What Is Power Shifting? (And Why It's A Bad Idea)

[@EngineeringExplained]

The whiteboard is back!!! And bigger and greater than ever as many have requested! I’ve been moving offices so it was taking a bit of a break, and I still have some lighting tweaks to make, but overall I’m stoked about the full-background whiteboard. What do y’all think?! Hope everyone’s having a wonderful day!

[@Diddy_Doodat]

You should get one of those white boards that connects to a PC

[@EngineeringExplained]

General Cigar sounds too advanced! Haha, problem is filming computer screens generally gets weird on camera. Frame rate can cause weird lines and distortions. And I like coloring with markers haha.

[@Diddy_Doodat]

@@EngineeringExplained screen capture looks good on camera

[@timmayaz3182]

I prefer the videos where you drive and talk about things. Usually the white board technical stuff goes over my head. I know that's what your channels about though and what makes you unique so I get it. I watch it all anyway. Keep it up, Jason!

[@henninghoefer]

I noticed it in the video and thought you had removed the background in postprocessing... 😆 Love the huge board!

[@chrisfix]

Dude we all know it’s a Hyundai... no need to tape the logo!

[@EngineeringExplained]

Don't be hatin' on my ride mate! Probably just wish your Chevy Mustang could keep up. 😘

[@anonymous-ky8gg]

Chrisfix here 😁😁 the sopy woder guy..

[@jitter_snipz9936]

Ladies and gentlemen we got em

[@MrRandom125]

*YOUR FEELINGS CHANGED, LIKE THE WEA-THER!*

[@chrwl007]

WRONG! It's a Honda. It even says S2000 on the floor mat at 3:55.

[@stevebarnes2]

This is a great technique if you're a 1970s F1 driver who gets a new trans after every race

[@jasont.9559]

Nah, I've done it thousands of times in over a dozen cars and never had a problem. I've even done it in old clapped out cars with 170,000 miles on them and not had a problem. It's a very similar concept to doing a clutchless upshift on a motorcycle. You're really just unloading the transmission just enough to get it to shift gears. It doesn't actually do any harm when done properly.

[@imadecoy.]

@@jasont.9559 When you clutchless upshift a motorcycle you roll off the throttle while doing so... unless you have a quickshifter. If you do somehow manage to get one to engage the next gear with the throttle on then it would be powershifting.

[@ameraldas3641]

so how about matching the rpm so that you dont even need to put your foot on the clutch

[@dopeass791]

@@jasont.9559 A motorcycle gearbox is a dog box type, that you can shift easy without a clutch. A car gearbox have syncros and don't work the same way.

[@therealfearsome]

the difference between "speed" shifting and "power" shifting

[@eoinkenny3188]

My way of looking at it is, power shifting results shock loading some point in your drive train. Shock loading = things breaking

[@gravemind6536]

It can be quite counter productive to acceleration in the lower gears too, you power shift from 1st to 2nd in any car with reasonable power you will spin the tyres some will do it in 3rd too.

[@SvenTviking]

It will wear the gearbox and clutch, no doubt, far worse than a clutchless up change.

[@Joke9972]

You are right, just don't do that, and that is the major reason not to do it! Can become expensive.

[@FordMaverickFanatic]

This is why you get a slipper clutch to prevent shattering your driveline while doing so...

[@eoinkenny3188]

@@FordMaverickFanatic Are there slipper clutches for cars? I've only ever heard of them on motorcycles

[@RanLinlayrian]

People who do power shifting are on the other end from those who do heel and toe.

[@EngineeringExplained]

Ran Lin haha yes, one is an art, the other is a tad lazy.

[@alexstromberg7696]

@@EngineeringExplained it's faster to powershift when everything is about a time. Not about lasting parts.

[@minghaoliang4311]

unless it's a drag race, changing parts can always results in more time lost

[@ggerely]

@Alex Faster than what? Power shifting is for up shifting, H2T is for down shifting.

[@alexstromberg7696]

@@ggerely faster than clutching on the upshift, but if you want to shift faster get a seq tranny

[@mojitocod]

So many shifts... I think I'm watching fast & furious lol

[@MatthewTaylor3]

No, fast and furious has over 10+ gear ratios to change through.

[@CarsAndZebras]

Haha, that's pretty funny

[@JasonW.]

@@Jtzkb need a minimum 2 speed diff

[@morrisdxdx]

But this one having A WAY MORE SHIFTS than F&F

[@jpteknoman]

@@Jtzkb its a bit like french tanks. 1 gear forward and 6 gears in reverse

[@joshhayes3433]

Did this in my old C5 corvette with TC/SC off - put it sideways in going to 2nd gear. It was a great intro to power shifting and I learned not to do it again.

[@EngineeringExplained]

Haha, thanks for sharing your story!

[@calvinhoward2277]

Never power shift in a Chevy in a low gear, they are one wheel wonders. The rear end sucks! 😂

[@islami658]

@@calvinhoward2277 too much torque

[@shaunwalsh85]

C5 owner here. Power shifting is great for import fwd drag cars if you can avoid bouncing off the limiter. Doing it in my c5 definitely ups the butthole puckering a few thousand notches. 🤣😂🤣😂🤣

[@KingENDLESS]

Gotta be careful with these damn C5’s 😂

[@ZylonFPV]

2:36 - Thank god you censored the Honda logo on your S2000! It will really stop people from being able to identify your S2000!... I mean.... Uhh....... your CAR.

[@EngineeringExplained]

Nothing gets past this guy, nothing! I'll tape the whole car next time.

[@TheBeso1994]

@@EngineeringExplained :D :D :D Tape it up with a yellow tape.

[@joshuanicor7806]

Blurs arent ment for hiding brand I dentity. It just means he is not sponsord by the brand.... and avoid lawsuits are stufff.

[@propstoyou9792]

@@EngineeringExplained use flex tape😂

[@psnmadracer27]

@@EngineeringExplained just like the pros do it at the nurburgring

[@HumbleMechanic]

If you cram the shifter hard enough nothing matters! My R32 has a tune option for NLS. Cool idea, but not something I have, or need. LOL Also I forgot my Last Pass password.

[@EngineeringExplained]

HumbleMechanic haha Charles there’s one rule, don’t forgot the one password!!

[@HumbleMechanic]

I know! So maybe I need Last Pass and Next to Last Pass that will remember my Last Pass password. I think I just got caught in a loop, just like time travel.

[@Firelogic00]

Maybe you should stick to recommending products you understand (no offence meant there). Saying a service/product is secure because it uses strong encryption key is similar to saying that the vehicle with the bigger engine is always faster. Both claims focus on one part and ignore the whole. You're awsome and we, your loyal viewers, trust what you say - i believe you should not promote or recommend a product/service that is so out of your field.

[@lukluk1914]

@@HumbleMechanic there should be two factor authentication so there is a chance of recovering master pass. Additionally if they compromise the master pass SSO page you are boiled completley. And well, it happens from tome to time regardless for how strong your cipher is.

[@Firelogic00]

@@lukluk1914 two factor authentication come as "double-lock", not as an alternative. If you have two locks on your door and you lost one of the keys, the door won't open.

[@jfisch]

My friend power shifted his Mustang all the time and now he complains that the clutch is out and he won't pay the money to fix it because it's his dad's car so it has just sat there in his yard for a year and a half. XD

[@EngineeringExplained]

J Fisch so did he learn haha?

[@xxxWINTERMUTExxx]

J Fisch this is why you should only ever do this in rental cars

[@autorecon]

@@xxxWINTERMUTExxx hahahahahaha come on guys rentals need some love too😂

[@fartmerchant762]

I feel bad for the dad

[@jfisch]

@@EngineeringExplained he's not really a car guy so he doesn't care which is sad. He's perfectly content driving a 93 Ford Ranger even thought his late 90's mustang was modded and made approximately 400 chp.

[@anthonyc4033]

Back when I drag raced my Evo IX, I powershifted all the time. But I had a no lift to shift patch added to the factory ecu. Once you touched the clutch pedal, the upper switch would activate and the rpm would drop a designated amount(operator set - normally about 1500 rpm). Then it would go into antilag creating boost. If your timing on shifting was good, you dropped the clutch at the same time as the antilag and you get close to full boost. The advantage of it was that it allowed a slow down of the drivetrain which help synchro of trans reducing the impact force.

[@AffyisAffy]

Oh that sounds really satisfying. I don't powershift 100% but it is sort of a halfway powershift/up blip the throttle to maintain momentum in the higher gears because otherwise my boost will drop.

[@RennieAsh]

50% comments = you covered the Honda logo on the steering wheel. Cool, nice new way to generate interest on your video!

[@TheLastHonk]

This is why I have a WOT Box. I no lift shift all of the time when racing. At WOT, once I hit the clutch it cuts ignition for 150ms to unload the engine while I shift and I don't have to lose boost between gears. It actually goes into gear easier than shifting normally. Now, if I ever misshift I'm pretty boned..

[@EngineeringExplained]

Yep! As mentioned there are some aftermarket solutions that adjust throttle, and even some factory cars that do it, but do it right. Thanks for sharing about yours!

[@Kyle11b]

This works great for NA cars too

[@Questchaun]

How to blow your clutch in 5 easy steps.

[@minghaoliang4311]

4 maybe?

[@stevek8829]

You don't even use the clutch.

[@blackfyre8837]

@@stevek8829 then you blow your engine

[@JAMESWUERTELE]

Ryan Warner I don’t think anybody realizes this.

[@guillaumejoop6437]

Actually it's only 2

[@micheals1992]

my driving instructor told me off for doing this on one of my lessons (I've never driven an automatic). I've been driving for years now though and I only ever keep my foot on the throttle when downshifting and all of my shifts are rev matched to reduce mechanical wear as much as possible and it also gives an incredibly smooth driving experience. I've also noticed that there's a bit of throttle loiter so I generally lift off for a split second before engaging the clutch so the intake manifold pressure has time to drop and the revs will instantly start to drop when you press the clutch instead of having to wait that extra time while having the clutch is pressed in. If you do it correctly you feel no engine breaking because the clutch target is when the engine is just passing into the neutral power point (I like to think of my engines power production as "Negative, Neutral, Positive") and as I re-engage the clutch I press the throttle so the engine re-engages rev matched to the gear and back at a neutral power point. I find this technique is extremely smooth and you can barely feel the change in gears.

[@brickswisher7672]

Right. Sure if you keep the accelerator to the floor and shift normally, all kinds of things could go bad.

[@williamko4751]

What a worthless technique. Go watch Touge . They sometimes put a camera on the foot. If Keiichi Tsuchiya and other drivers don't do it, then no need to do it. Case close

[@Sidewinder5]

"Granny shifting, not double clutching like you should"...😀😀

[@worldtravel101]

Lmao

[@vampyrew0lf]

You never had me....you never had your car...

[@MillionairesDiary]

The most well known quote in the entirety of car culture

[@Patrick94GSR]

More like, the entire movie script is the most well known in the entirety of car culture.

[@robertr7923]

@@henrym5889 me too

[@andrewwilkinson9961]

Love the old white board you explain everything so easily to understand nic11 Jason

[@natemanten1558]

I'm fairly certain it was originally used in F1 (first by Gilles Villneuve I believe) so it makes sense that it would be brutal for the clutch/transmission. The Ferrari had brutal turbo lag at the beginning of 80s in F1 so the reasons for why they would powershift also makes sense.

[@armadillolover99]

There were a lot of interesting solutions that drivers had back then to deal with turbo lag, like Ayrton Senna used to continuously blip and unblip the throttle through corners to keep the turbos spooled up without really putting any power down.

[@ClellBiggs]

I'm 39, been driving stick since I was in my late teens, and didn't know people did this.

[@JustA.Person]

Same lol, I just found out my mom has been doing it her entire life and finds it super normal

[@williamko4751]

What a worthless technique. Go watch Touge . They sometimes put a camera on the foot. If Keiichi Tsuchiya and other drivers don't do it, then no need to do it. Case close

[@CFITOMAHAWK2]

@@williamko4751 No its not. Its fun, and makes you win races. Not for dorks..

[@williamko4751]

@@CFITOMAHAWK2 do you even know what Touge is?

[@CFITOMAHAWK2]

@@williamko4751 You cannot power shift much when drifting, it will slide. It is for straight ahead driving.

[@Ryan-re7oj]

This sheds some light on what irreparable damage most likely incurred to my first 5spd transmission. There was lots of experimenting and learning done with that car. RIP mighty Saturn.

[@EngineeringExplained]

Hahaha, the mighty Saturn taught you the way, worth it!

[@Str4vv]

I really wish there were a few more shots of shifting from 1st to 2nd. I still didn´t quite catch it :D :D :D

[@EngineeringExplained]

Fast & Furious style 😂

[@Str4vv]

@@EngineeringExplained i really only did a power shift once by accident from 2nd to 3rd on the autobahn. Took a few seconds for the clutch to finally catch up. Felt just plain terrible. Anyway, nice vid, keep it up!

[@Baphometus666]

You covered the steering wheel logo, but not "S2000" on the floor mats.

[@zokusharuuku1091]

Cobb acessports allow you to set an rpm at which the engine bounces at when power shifting. This way you can rev up to 7200 rpm and setting the rpm to 6700 rpm it’ll drop and bounce at 6700 and when you shift the rpm drops to 65-6600 rpm. This makes a big difference in boost in turbocharged engines especially for cars with large turbos. When I do not power shift the boost drops 10-15 psi and with a large turbo takes a bit for it to spool back up. Na cars probably should not be power shifting but in turbocharged cars with large turbos it is almost vital to do so.

[@niacal4nia]

I've been power shifting for 180k miles on a Porsche 928. My original clutch was replaced @ 150k miles and my synchros still work. Car came with twin clutch disks.

[@NieJestemzPolskiPL]

Why did you cover honda logo in steering wheel?

[@EngineeringExplained]

NieJestemzPolskiPL it goes faster when it doesn’t think it’s a Honda 😂

[@therealsnow]

Because it's free advertising

[@autorecon]

@chez421 not now😂🤓

[@youkofoxy]

They didn't pay Jason the tax.

[@fairladyz9957]

No it’s a Miata

[@radioactive9861]

This video explains why I was so hard on my manual transmission vehicles. I was not very 'coordinated' when it came to shifting...sometimes I would over rev the engine and sometimes under rev the engine thereby causing more wear and tear on my clutch and having to replace it WAAAAY too soon.

[@ProDigit80]

Jason, can you do an episode on clutchless shifting, and how it works internally (within the transmission)? Thanks!

[@dillonparkhurst8027]

Was hoping someone would mention this. I'd like to know the difference between doing this in a synchronized and non synchronized. I love floating gears in my 5 speed xj, ofc I have synchros and no real reason to do this but enjoyment. I've prolly shaved a few miles off learning xD.

[@Tsch6373]

@behexen250 did up- and down-shifts on a non-syncronized trans floating the gears. Needed the clutch to start and stop. This vehicle had no tach, listened to the engine. Not doing this 'power shifting' in my car. My clutch is going to last for the life of my car. Never knew anyone who did this.

[@elkvis]

Aftermarket fuel management systems, such as the Holley Dominator system, allow you to connect one of their inputs to a clutch switch, and allow you to program it so that you can hold the gas to the floor, and when you depress the clutch, it cuts off fuel until you release the clutch pedal. This is intended to obtain faster shifts, but it also has the added benefits that there is less risk of damage from over-rev, and it allows the engine revs to come down for the next gear. Edit - I wrote this before I got to the part of the video where you talked about this LOL

[@austin8898]

Fun fact: The Chevy Cobalt SS came from the factory with no-lift shift. Probably one of the cheapest cars to ever have it stock.

[@EngineeringExplained]

Neat! Yeah GM seems to offer it on several cars these days.

[@serfnuts]

SRT-4s did too.

[@jasontruong48]

Too bad 95% of them already at junk yard.

[@angryindividual7030]

I used to have an ss damn i miss it, it would shoot flames with the stock exhaust everytime i power shifted. My subie definitely isnt as fun as the ss i had.

[@SupraSav]

Enjoy body work. Have yet to see one of those not rusted right out in Canada..

[@CFITOMAHAWK2]

You can also Power Shift at low power. Its not Full Power Power Shifting always. Im used to do it even while slow cruising the streets. Low Power Shifting is called. Lots of fun without damaging any parts..

[@OMGitzBadCompany]

Small correction, the key used in the encryption is 256 bits long, not 256 digits. 2^256 vs 10^256, that's a big difference lol

[@ellenorbjornsdottir1166]

dis

[@megahurts2]

Dang, it is so weird for me to watch a video and recognize the landscape haha. "I know where that is!" Awesome video!

[@geofrancis2001]

i have a 1.0 2000 VW Polo with 50hp and power shifting is kind of essential for any kind of acceleration lol, im not worried about gearbox or clutch as both are rated for more than double what im putting through it.

[@discerningmind]

Very good, and I'm in complete agreement with you. Power shifting is going to be more effective with a vintage car or one that doesn't have a computer acting upon engine control. With a vintage car Power Shifting can be added-in with other effective means to make fast happen, such as the driver being fast off the line, and having an adept right arm. But I want everyone to know that there's a dangerous event that can happen during a drop-clutch launch, and Power Shifting. I'm not talking about loosing control of the car. It's the deaths and severe injuries that have happened when a flywheel isn't up to par. Flywheel bolts can shear and the flywheel itself can blow right out of the bell housing. The force is so strong that the flywheel will slice right through the floor of the car and go on from there. And there have been cases of decapitation. This primarily dates back to the 1960's-70's but it's not say the danger wasn't present after that period. I think most of these events took place when guys would build-up an engine but use a flywheel that's too weak for the power, or lame worn out bolts, or a flywheel without as many bolts as a heavy duty version would have. But this isn't to say it can't happen with a modern car. My suggestion is before using any racing techniques, it's going to be safest knowing what the mechanicals are in a given car, and determine if that car is up to how you're going to drive it.

[@CesarMartinez-wi7wc]

I'm impressed he didn't pull out transmission and clutch . . .

[@vanquish421]

"I didn't know what that meant at first, so I went down a long rabbit hole and learned about encryption." Jason, this is why I like you. It's that kind of mind that we need more of in this world. Be curious about EVERYTHING! And take advantage of our entire history's worth of knowledge right at your finger tips and often free of charge.

[@fletcherluders415]

I don't power shift, but maybe I should stop fast shifting and stressing out my synchro. Thanks for pointing that out :D

[@LongNguyen-lx8if]

Fletcher Luders but...fast shifting is sooo funn

[@Akyomi777]

Aren't like synchros built that way?

[@Luis-cr1tw]

What is the problem with that? Because if i do it slowly is far worse...it slips and it is harder to engage...Also, i loose power.

[@HenDawg.206]

I found this very helpful to learning manual transmissions, as a car enthusiast who has owned two 300+hp automatic vehicles in their 5 years of driving while barely grasping the real world (when you’re actually DRIVING one) experience/knowledge of how manual cars throttle works (vs being explained the concept or using video games). Needs an addition to title “and manual trans engineering explained” lol. As always, solid video! 👍🏼👍🏼

[@sirtinley-knot2944]

'car enthusiast' that's never driven a manual🤦🏻‍♂️

[@WJHandyDad]

great explanation... in the ~20 years I drove a manual as a daily driver, I never could make myself powershift... always took foot off the gas for a brief moment while I shifted. Now after seeing your video I'm glad I did!

[@Edelhif]

He has a very strong friendly trusting relationship with his Car, when he start getting excited and really deep into explaining stuff, his Car knows he will do emotionally gestures and kindly does the steering for him.

[@timothyparker9070]

This all depends on how your engine and your transmission ratios align. My toy will idle at 25mph in 5th. To get smooth shifts during light acceleration I have to half throttle every shift. It's all about rev matching.

[@anthony-i1k8c]

The Chevrolet Cobalt SS turbo was designed to be power shifted. Which was pretty cool! When tuned then it wasn't a wise idea as it is pretty stressful on the clutch in the first place. GM put in the biggest clutch that would physically fit.

[@SilverHunterIsHunted]

I tried this last night just to see how it was. Bad smell for about a mile. Won't do it again without a no lift kit or tune

[@EngineeringExplained]

Haha, clutch doesn’t smell great!

[@TONOCLAY]

Luckily enough EastPhilly burning the clutch here and there doesnt cause too much issue. The people that burn up there clutch are the people that blip their throttle over and over while trying to take off lol.

[@jakegarrett8109]

@@TONOCLAY Ooooh, good video idea! Does blipping throttle actually lead to significant more wear, and also compare higher revving launches (something reasonable like 2k-3k rpm). I know at 6k+ rpm I could smell burning clutch for a ways, but hey, its a little rotary engine, those things don't make power much below that. It's really difficult to take off, for example, the tire shop stalled my car no joke 6 times moving it 50 ft back to the parking lot, I was busting out laughing... I guess I have a good battery after all!

[@quackman]

I was thinking of going full LastPass, nice to see someone like you backs it as well. Also, awesome vid as usual!

[@Kiret123]

why honda badge on steering wheel gumtaped?

[@OnlyNotes]

Copy written logo? I'm not sure, but that's my best guess

[@noelmedina6925]

To not get glare on camera

[@CarsAndZebras]

It's in the middle of a brand identity crisis.

[@propstoyou9792]

Because the car goes faster when it does not think itself is a Honda

[@NidalRashid]

Because he was in gammutappu deathmatch.

[@mychevysparkevdidntcatchfi1489]

There can be large benefit in acceleration in that you're taking advantage of stored rotational energy to accelerate the car if done quickly enough. You kill the clutch in the process as you point out, but it will result in quicker acceleration. And one might have to do this if competing against electric car in acceleration.

[@williamko4751]

What a worthless technique. Go watch Touge . They sometimes put a camera on the foot. If Keiichi Tsuchiya and other drivers don't do it, then no need to do it. Case close

[@fernandoanatomia]

This is the kind of video that makes me to regret a lot of mistakes I've done while learning how to correctly drive. Thank you!

[@EngineeringExplained]

Haha, all good! We all learn at some point!

[@omialmanza1900]

Unlike other car youtubers, i swear to god you deserve a gold metal for all you videos. Thank you.👍

[@RdTrpBrgr]

*laughs in automatic*

[@saintshaggy1372]

Lol

[@saintshaggy1372]

*laughs in horse drawn carriage*

[@derian345]

Laughs in bus 🚎

[@minghaoliang4311]

laughs in bike

[@richardschofield2201]

Cries walking home from a failed MOT

[@FrangoTraidor]

Powershifting, also known as full-throttle shifting or flat-shifting, is a method of shifting used with manual transmissions to reduce the time where the driving wheels are not powered. Unlike a normal gearchange, in a powershift the driver does not let off the accelerator (unlike speed-shifting, where the throttle is let off very quickly, simultaneously depressing the clutch and shifting into the next gear, rapidly). The clutch is briefly depressed while the shift lever is rapidly shifted into a higher gear, keeping the engine in its power band. Keeping the engine in its powerband allows it to put down power quicker when the clutch is "dropped" and power returns to the transmission. In most cases, there is a method of cutting the ignition or fuel delivery, in a manner similar to a rev-limiter, which prevents the engine from over-reving when the load from the transmission is removed. Many aftermarket engine management systems provide this functionality as either a standard feature or as an option, usually combined with launch control.

[@itscasper4683]

Why is there tape on your steering wheel though?

[@EngineeringExplained]

ItsCasper I heard stickers add HP!

[@RanLinlayrian]

Same question, did Honda threaten you not to show the logo?

[@itscasper4683]

@@EngineeringExplained well, thats very true actually

[@itscasper4683]

@@RanLinlayrian Honda would copystrike the video

[@kuvisit]

Seriously though, why?

[@789pokey]

I started driving in the '60's. In Street racing back then if you wanted to WIN you power shifted, just that simple. Off the line you can feather the clutch and be part throttle because you want a little bit of wheelspin but you keep adding throttle as the tires will take it. You should have the pedal to the floor before the end of 1st. Once you get it floored you NEVER lift till you cross the finish. And you don't disengage the clutch, you just brush the pedal enough to loosen the pressure plate so you can muscle to the next gear with a big arm on the linkage. (that's why Muncie had brass synchro rings, so any shavings wouldn't damage the gears)

[@thephantomzoneboxing]

so just abuse the car? got it

[@789pokey]

@@thephantomzoneboxing; If you want to win, you power shift. If you're a loser, never mind.

[@joestorey3210]

Hey Jason, I'd love to see a video on modern manual transmissions/clutches. Mainly around delay valves/rev hang and what can be done to combat it ? I love your channel and an explanation from you on getting around this problem with modern manuals would help a ton! Cheers

[@chippychopper4459]

Actually if you synchronize the engine speed with the transmission speed you can shift without a clutch and it will not damage anything. But you must practice the technique to get it right.

[@fomalhaut86]

Why did You cover that MOMO logo on the steering wheel with gray tape?

[@Snootchiebootchies699]

Question for normal daily driving. What I do is Stopped at a light or whatever Give minimal gas Slowly and smoothly release clutch Clutch out, gently roll onto the throttle for normal acceleration (not trying to be speed racer) As the revs rise, smoothly roll off the gas to the point where I am no longer accelerating but not decelerating either. For numbers sake let’s say I’m at 3k RPM. Clutch in, holding the gas pedal where it is at. The revs don’t jump up, but fall at a slower rate then if completely off gas. Pull the stick out of first into neutral, then to second. Clutch released out smoothly. Rinse repeat. My question is, is this as bad as power shifting when floored? Just going by feel, everything seems really happy mechanically. Shifts are smooth like butter and the synchros practically pull the gear stick out my hand where I can shift with only one finger.

[@austincline5960]

Starts at 1:30

[@codydietrich4246]

I drive a 3/4 ton truck with a 5-speed manual transmission it also has synchronizers. In between every tooth of every year is a very tiny space. That space is utilized by acceleration one side of the tooth or deceleration the second side of the tooth. You can go from accelerating to decelerating and there's a space in between where it slips out of gear. This is is what the clutch does. Then once it's out of gear you either accelerate the engine to match the speed if your downshifting or that the RPMs drop for a higher gear. It's called rev-matching and slip shifting. I do it in semi trucks. They just don't have synchros. Most people driving a manual transmission don't understand rev matching

[@Ronald.Golleher]

Jason, what you talked about today on the transmission and synchronizers reminds me, would you talk about floating gears (shifting w/o clutch, matching engine speed)? I know it mainly used in big trucks as an alternative to double clutching, but have had to do it personally when slave cylinder on my (diesel, lower RPM) truck went out

[@NickDiNunzio]

The theory behind powershifting isn't to get a lurch between gears, or to cause a boost in acceleration. It's to minimize the amount of momentum loss during gear shifts, and honestly, if you're executing the shift quickly enough, the amount of additional wear is negligible. Quite frankly, if you're causing significant wear from powershifting, you're doing it wrong. But there isn't really much evidence behind powershifting in and of itself causing significant wear on drivetrain components. It's just simply more quick to shift that way, providing you're doing it correctly

[@robomatt1600]

I've taken network security at the college level. Most of the password managers out there are just garbage, cryptographically speaking. I use LastPass as my own password manager. It even has good export and backup features. You picked the right product to promote :-)

[@mik13ST]

It is not open source, that's what matters when personal security is concerned.

[@robomatt1600]

@@mik13ST I completely agree, but right now, open-source projects can't keep up with the constantly changing browsers and mobile platforms. In theory, open source is best. In practice, you have to trust and pay a company to get a good product. They will decide if they want their code to be open source or not. If you've found an open-source platform that is integrated across the latest versions of Android, iOS, and windows, that actually encrypts the passwords, let me know, and I will happily stop paying for LastPass.

[@stevek8829]

Like you know the difference between RSA & DH.

[@markonfilms]

Yeah I agree. LastPass has a good long term reputation too. Anytime there's been even the slightest security issue they took care of it fast. Plus any decent password manager will be better than using the same password over and over. There's best security and then there's the fact that even techies are lazy. Let's face it... Who is going to want to go to all the trouble of manual password management to the level you would with something like LastPass.

[@TheGIANTgonads]

Well i made a little program that spits out a random string when you seed it with a password, I use the number of programs currently generated to influence the seed so that each password is unique, i select the program/site from a list, then enter the seed and i get my password for that program/site. I think it's good enough to stop most common attacks.

[@ghost-jesus]

Worth noting that while in a small displacement engine or an engine with a very lightweight rotating mass it doesn't give much of a boost in acceleration, but in a large displacement engine with a heavier rotating mass can result in a a slight wheelstand even when going into 3rd or 4th gear. It still is hell on your transmission, but a pro tip, if your transmission has spur gears it's easier to do without the clutch and the trans will tolerate it a lot better

[@slurmisgood]

I've seen you use this road a few times, are you from Boise? Great video, thanks!

[@glenb.9811]

Only time you'd flat-shift with no clutch is when operating a vehicle with a sequential box and a powershift (ignition cut) switch, because sequential boxes generally have constantly-meshed gears. Watch Australian V8 Supercar racing (which use sequential boxes) or motorcycle racing (ditto), and you can see when they show a footwell shot (or rider shot), the driver doesn't lift anything (or operate the clutch). You can hear the unburnt fuel ignite when they release the shift lever and the ignition cut switch allows spark again-there is one heck of a bang...

[@animalpeeps]

Yooo liking that whiteboard tho 👀

[@ColeSpolaric]

Do you do other topics other than cars? I ask this seriously as the name of this channel is engineering explained which is way more than just cars. None the less, you do a good job explaining these topics.

[@AX-xi2pw]

Ok so bottom line is: clutch kicking is bad Ye, so is putting stress on any other part of the car which happens alot in motorsport. Ye it's not good to powershift your way to work in your commuter just like it's not good to pull sick 10 feet jumps or even reving the engine over 2.5k But on a drag strip when you're trying to shave off split seconds, wear and tear is the least concerning aspect.

[@EngineeringExplained]

Sure, on a drag strip is has its place! The pros are replacing their clutches after every run, and rebuilding the engine each run!

[@stevek8829]

@@EngineeringExplained No they are not. After hundreds of runs the gears get some wear but pressure plates and disks hold up well--stock & super stock.

[@jordanbell4420]

Nothing wrong with revving the engine, so long as A) everything has warmed up to operating temperature, B) you have enough oil, C) you don't push it past redline

[@starwarrior125]

Steve K It depends on how high your going in regards to needing to replace things. In the Higher tier of Racing Yes people are rebuilding their motors each run/race and even replacing their clutches. There are people pulling out melted Pistons and Rods along with replacing heads if needed after every run. Heck some people need to replace the entire motor because the Bottom end blew up throwing shrapnel threw the block leaving Fist sized holes after a single pass. The rest of the drive train doesn't fair much better.

[@AX-xi2pw]

Jordan Bell I guess you're right. Altho there are a few things you would wear out faster at high RPM use piston rings, timing belt, water pump, oil pump and probably some other stuff. But maybe a bad example. My point is that wear and tear is in the nature of racing, so saying that a racing specific technique is bad for the car is kind of redundant in my opinion.

[@MotoRacer171]

Now on a dirt bike, the transmissions are so perfectly engineered you can shift with the throttle wide open and not have any issues. in fact you dont even need to clutch most of the time whether going up or down. Obviously the drivetrain is much lighter aswell.

[@NC-vm6dv]

2 Million subscribers coming up!!!

[@mm6705]

None of that matters. Shifting fast (lifting throttle) will still create the rpm disparity. No lift shift programs in aftermarket ecus and many oem performance cars don't allow the rpms to go higher, but you still have the same rpm difference for the syncros. If you drag race, street race, or w2w, no lift shifting is extremely beneficial, and easily shaves 1/10 off EACH shift. More time benefits if you have a turbocharger. Yes, you are absolutely trading synchro life for time gained, but transmissions are easy and cheap to rebuild, and most people would agree that winning your class, or race, or getting a record lap or personal best is worth it. Absolutely not worth it if the car is your only vehicle, and you daily drive it. Unless you win a bunch of money betting on yourself in a street race or something, but still.

[@ollyhere123]

I don't see any reason why you would do this, if you're that desperate to keep your turbo on boost us an antilag system, great video as always

[@shenaniganshop3309]

Oliver Leahy antilag is way worse for your car then no lift shifting, your turbo and exhaust valves are on borrowed time if you use antilag and it will absolutely destroy your catalytic converter. Antilag is really bad for your exhaust haha.

[@jordanbell4420]

There is only one reason to power shift- because its 1159, and you need to drop the rental car off by 1200 to avoid the late fee.

[@adamurmos9270]

It's such a no-brainer, my instructor pointed out the I am riding the throttle while shifting during our first lesson. Its an easy mistake to make if yoh have not yet learnt the pedal positions yet, but I had no idea people were intentionally doing it!

[@TheJamminest]

S2000 on floor mat. Censored Honda logo on steering wheel 😂

[@nodarikirtadze8220]

Maan, my knowledge and enthusiasm for cars have sky rocketed

[@martinvranovsky7085]

Wow, this is the first time I heard that someone actually does this. I thought it was one of the things they beat out of you in driving school.

[@awesomexistence]

Years 1970-75 i drove my 68 Camero “bang shifting” regularly. I had installed an heavy duty clutch and fast reflexes on/off the clutch provided a load of street racing fun. Only problem i had was a loosened shift linkage on occasion and blew the pinion gears once. 😂Sure miss those days!

[@evil_me]

I just run antilag on my subaru, maintains boost and doesn't destroy my "glass" 5 speed gearbox

[@mobilePCreviews]

But it also blows out your turbo

[@evil_me]

@@mobilePCreviews when set up properly it puts no more stress on the turbo than the engine does under full boost. True it can have issues if you just set the ecm to enable antilag without any tuning. I have a true als on the car that includes a pwm controlled bypass valve, egt sensor and turbo speed sensor, which is the correct way to have antilag but is expensive so no one goes to the hassle.

[@mobilePCreviews]

@@evil_me anti lag is literally sending an explosion into your turbo, that's what anti lag is, that's why you'll spire out of your exhaust pipe and keep the rpm up. The explosions coming from your pistons have to go through the head first which cools them down a little and smooths out the airflow before it hits the exhaust impeller on the turbo. With anti lag it's just an explosion happening in the exhaust manifold due to rich fuel conditions when off the gas. Saying anti lag doesn't hurt your turbo is like saying rallying your car doesn't hurt your suspension. Theres numerous articles talking about the damage anti lag does to your car, good tuning or not.

[@skifree0]

@Wing Phoenix, It's not the ignition within the turbo that's the issue. the main issue is turbos are not designed for that kind of abuse. it's the shockwave itself (and the extra heat) created right next to a turbine spinning at 100k rpms....with 1 flimsy bearing and 1 oil line. There is no way you can expect a turbo to live with that kind of heat and pressure being experienced. You are essentially creating a crude turbojet outside of the block with ALS.

[@halofreak1990]

@skifree Not sure if things really work that way, as people run 2steps on N/A engines as well. If a 2step has a measurable effect on an N/A engine, then I doubt there'll be much damage to the turbo in an actual turbo setup. Cleetus McFarland (check out his KZbin channel), for example, has had a 2step on his 1500HP twin-turbo V8 for ages and never had a damaged turbo.

[@monstar2one]

Love the video. Keep it up. I know you talked just a little bit about factory vehicles with no lift ship at the end but I would love to see a whole video on just that topic. The way Porsche does it with their new 911 is super interesting but there’s just not enough content about it out there.

[@lancebaker120]

You haven't drag raced!

[@taylorclark6927]

You are awesome man, I remember watching your videos in my teens, learned so much from your videos since, reliable information genuine passion to teach, keep it up 👍🏻👌🏼

[@resiflo99]

Lol @ the duct tape over the honda emblem on the steering wheel

[@TorchedRC]

Your loading energy into the flywheel while shifting. Especially beneficial in drag racing if you still have the regular weight flywheel.

[@andershifdt6847]

But Jason, why did you tape over the Honda badge on the steering wheel of your S2000?

[@EngineeringExplained]

To troll the comments section haha.

[@cybersteel8]

You had a good opportunity to mention dogbox transmissions in this video, it's kind of on topic when talking about clutchless shifting

[@Cekmore]

Could you explain a 'dogbox' transmission?

[@scottthomas6679]

TL;DR on a dogbox is gaps in the gears so you slam through the gaps going gear to gear. Not a recipe for a smooth driving car but when 10th's win the race...

[@diabetic]

Local Boise fella here. Thanks for the quality content!! I see you around town all the time and just saw you jay walking across Broadway. “Engineering Explained!!”

[@EngineeringExplained]

Haha, don't tell the police. Always been a bit of bad dude.. 😂

[@_M27_]

could you make a video about sequential gearboxes?

[@andrevinicius1360]

Good ideia...

[@clarkreddick480]

Step two is not to push in the clutch but to preload the synchros. Powershifting as described will likely result in a failed shift and redlining the motor with no load. Power shifting in certain classes of drag racing is the difference between winning and losing.

[@DrummerBoii1411]

You could maybe leave your foot on the gas when you’re downshifting. Let’s say you’re in 6th at 30mph. You need power and want it quickly. I do it only downshifting to overtake cars not when up shifting tbh.

[@MillionairesDiary]

Why are you in 6th at thirty? do you like pinging your engine with LSPI?

[@DrummerBoii1411]

Tim toft lol if I’m cruising and my car is able to do 30 in 6th and be steady above 1K revs. Why not do it? 😂

[@youkofoxy]

Nope, having driven a Toyota bandeirante with bad clutch hidraulics. I can say you shouldn't floor it while shifting, unless you do it so quickly that the engine doesn't rev up to much.

[@MillionairesDiary]

Because LSPI is incredibly destructive to engines. This entire video is about why you shouldn't do something just because "you can" or "you want to"

[@DrummerBoii1411]

Tim toft Yeah but if I’m cruising steadily I’m not going to put the engine on a load with acceleration if I need to accelerate I’ll drop the gear 🤷🏼‍♂️ 😂

[@jackrabbit7389]

Powershifting is a MUST on drag racing. You never want the RPM to drop very much engine has to fight back through the RPM. If you are racing power shift this guy knows not what he is talking about.

[@Redtooth75]

It is a bad idea on a street driven car. Power shifting is very hard on a transmission and entire driveline. Drag cars are built to handle it, street cars are not.

[@789pokey]

Jack, absolutely. If you want to win you power shift. Street,track whatever.

[@BlackCubone]

Video starts at 1:21

[@TheSilent1998]

Not all heroes wear caps 😂

[@matthewmcewen1]

@@TheSilent1998 nor capes

[@CFITOMAHAWK2]

Power shifting Its fun, and makes you win races. But it is Not for the coward, the clumpsy or for dorks..

[@tazanteflight8670]

"Never lift" refers to letting off the gas in a turn, which can initiate a spin.

[@Akyomi777]

MR2 intensifies

[@megahurts2]

You can kind of do "No lift shifting" in the 3rd gen Tacoma's. More specifically, you can leave the cruise control on in the Manual Transmission setup and when you push the clutch in it cuts power to the engine and brings it back when you let the clutch out. Kind of a weird feeling lol.

[@sarmatiancougar7556]

Isn’t the power shifting without a clutch going to just break the selector fork apart? Especially if you’re dealing with high torque engines like Dodge 440 or Chevy LS?

[@stork7930]

Power shifting is effective for drag racing, there's really no debating that. It's obviously not great for the drivetrain but neither is racing the car in general so it is what it is. I have a couple of videos on my channel of me drag racing while power shifting if anyone is interested to see it in action.

[@gonzomuse]

What a ridiculous idea. "Power" shifting sounds like something dreamt up by someone that has only ever driven in video games. If you have more than a couple of hundred horsepower it's a good way to lose traction. Let alone the added stress to your entire drivetrain and an annoying jerky change. I'd encourage a quick compassionate slap in the chops, and a brief "stop that doofus" if you ever catch someone doing it.

[@Tilmann5138]

So, Rally drivers only ever have driven in video games? Good to know.

[@gonzomuse]

​ @Tilmann Giese LOL, yeah. Go back to Drift. Rallye drivers are extremely careful with throttle inputs. There is no way in hell you would ever catch one changing gear in this manner, unless it was a sequential computer controlled shift, and that is clearly not what "power" shifting is referring to.

[@Tilmann5138]

@@gonzomuse didn't know that there was computer controlled anything in the 80s. You do seem to know a lot!

[@gonzomuse]

@@Tilmann5138 Didn't you? I owned my first computer in 1982. Again, any professional driver doing WOT shifts will have a device, mechanical or electronic for cutting the throttle during changes to allow the revs to drop for a short period. That isn't what this video is referring to.

[@Tilmann5138]

@@gonzomuse wow, nice sarcasm detector.

[@lw216316]

One word left out - racing - mention made of a "bump" and of a "little bit" - drag racing is often won by hundreds or thousands of a second if you win then you use part of the money to buy a new clutch.

[@saintshaggy1372]

Great way to *break your clutch*

[@jasont.9559]

Not if know what you're doing. The trick is to preload the shifter and only depress the clutch pedal enough to get the car to shift, don't push it all the way to the floor. I'm sure it adds a bit of wear to the clutch but if you're quick and smooth about it it's not as bad as you think. I've been doing it for over 20 years and never broke a clutch or had one wear out prematurely.

[@SupraSav]

@@jasont.9559 If anyone is still amateur enough to put the clutch pedal all the way to the floor when shifting, you should not be trying to powershift..

[@CFITOMAHAWK2]

Its fun, and makes you win races. Not for the clumsy or coward, or the dorks..