How I Rev Match PERFECTLY without being a good driver

[@BaldBozo]

" Scientifically Speaking this car fucks" - Rob

[@Innovaspeed]

Rob, GM abs has a huge reputation for going into "ice mode." This isn't anything to do with your tires. Look up the BMW Mk60 ABS swap and it is what you're looking for.

[@Vgk36]

🎉 guys have totaled cars with that dog shit gm unit. Been building cars since the 40s and can’t figure out abs 😂

[@Ayane13b]

Lift off oversteer is what you're looking for ;) Its a very real thing that happens, and is on all cars, but moreso apparent on others. This is why braking happens pre-corner, so you can let the car settle mid-corner to get back some of that rear traction. This is also why trail braking is a thing. Unloading the rear tires to get some more rotation IIRC

[@mstrdtiger]

One technique to avoid it, one to take advantage of it.

[@jeffessenn]

Isn't this also because of weight transfer when applying throttle? It's especially important for FR drivetrains since most of the weight is in front so when you let go of the throttle the weight shifts forward off of the rear tires where your power/traction needs to be.

[@bass2762]

@@jeffessenn I'd say lift off oversteer is more prominent on mid and rear engined cars due to more weight being on the rear wheels during acceleration but during braking, a lot of that weight transfers forward and causes the rear end to act like a pendulum causing the lift off oversteer.

[@MrTurbo_]

Lift off oversteer is even more noticeable on front wheel drive cars (because the engine breaking on only front wheels), but with fwd it is really easy to control and can be quite fun

[@pauljs75]

It sounds like one of the tricks to go faster with FWD, you go in a bit hot sometimes to get rotation. But I guess drivers used to RWD prefer the gas pedal.

[@dmp.performance8635]

Seeing you guys putting the trailer to use with all its features brings me joy. All the hard work and time you've put into all the cars, You truly deserve this and much more.

[@tardbucket]

You can tell robs a real one by the way he shows himself getting towed off track. Most people would edit that out to avoid embarassment. Nothing wrong with going to the track and finding out your not ready yet, thats how racing works

[@ViperKillerWannabe]

I don't know about most people, but there are definitely some out there that would.

[@M00n3at3r]

Makes all the little wins so much more special for Rob and all of us who love the rotary life and seeing what it can be pushed to do.

[@davessparetime83]

Do you purposely leave your trailer hitch ball loose?

[@shaynegadsden]

Yeah that was asking for trouble

[@jacobboone6078]

Yeah not good!!!

[@njinthemj52]

2:46 Insert some joke about loose balls or something

[@nata911]

Bro please tighten your trailer ball I lost a car for that same reason please don’t tempt fate rob

[@andrewable2634]

of course they would properly secure it lol.. its a small cut of the video

[@josephmatuszak3855]

The difference in the way the car goes thru corners on or off power can heavily depend on the type of differential as well as the gear ratios / powerband under load

[@Incognitodemons]

100% lsd/differential.

[@pandapanda730]

This car is pretty heavily rear weight biased now with the rotary too, isn't it? The way rob describes taking it through a corner is how people describe taking 911's through corners.

[@Jonathan_Doe_]

Yeah the difference between 1 way, 1.5 way and 2 way LSD’s is massive.

[@SaulHeno]

@@pandapanda730 I could be wrong but if hes letting off before/during a turn, the weight is shifting off the rear and moving more toward the front. That weight shift is good to give the front tyres some more bite, but ultimately sacrifices rear grip. Especially compounded by poorly setup geometry (like Rob noticed). As Joseph and Ashes said too it could be whatever way his diff is configured that it might or might not lock under decel, which would add more instability/unpredictability in the rear

[@chrisforte8229]

and whether you are spraying engine oil on your back tires.

[@scotty305]

New trailer looks really helpful. If your fuel tank has provision for a fuel level sensor, you can usually rig up a pullup resistor to convert the sensor resistance to 0-5V or 0-3V voltage. Then start with an empty tank, fill up one gallon at a time and note the sensor voltage. Depending how flexible your ECU or dash are, you can convert from voltage to gallons or just set an alarm to remind you to fill up when the level gets below X gallons. Be prepared that the fuel level will slosh around quite a lot, the OEM fuel gauges have so much smoothing they will be slow to respond when you refill the tank at the gas station.

[@scotty305]

Also I'd like to hear about all the various oil leaks or failures you've experienced, and how they might be prevented.

[@Torstein720]

You should torque your ball on the hitch up. 2:45 - 2:47 you can see the ball itself moves. As far as I am aware that should never happen.

[@danielpeck6269]

I've noticed KZbinrs inserting clips of things that are obviously wrong just to boost engagement with the video.

[@ThomR34]

​@@danielpeck6269I dont think Rob is that type of person.

[@Torstein720]

@@danielpeck6269 I'm not sure if you are right or wrong on this one. I have not noticed that "youtubers" are doing things wrong and intanitaly doing things unsafe, but it is not right! the ball should hard mounted!

[@NeighSayer12]

Watching that ball wobble on the split lock washer really made me nervous. Happy I'm not the only one to notice it. It is odd that it was a spliced in clip all by itself.

[@alexcecil89]

If it was on camera like that, my guess is they saw it and thought it was funny and videod it so we'd have a good laugh and then they tightened it

[@Tclans]

That mood lighting absolutely kills it. Superb Addition 👏🏼

[@DeweyWRX]

Bummer weekend. Happy you are living the "get to the track early" life now. It's a game changer for sure. Can't wait to see you at Laguna!

[@andrewbarroso96]

Rob appreciate everything you do. All the engineering and self teaching is super commendable. Have you guys ever toyed with the idea of doing a rotary swap with one of the 86 twins. A 10k 5-700 HP handling grip machine. A mild flat torque curve with max HP at redline. I can't help but wonder what you guys would be able to pull off with a platform like that

[@kajunkat72]

Rob Dahm, nothing but love for the content, been following a long time! Just wanted to make a polite suggestion, I have been transporting 20 years, I wouldnt trust those size straps ever to hold a car. They may seem fine but in an emergency manuever I would not trust them not to fail. Good properly sized straps are well worth the money!

[@sirseven3]

Rob don't forget. Pressure readings are measuring resistance, you don't necessarily want high pressures as long as you have high volumetric flow.

[@gupti]

injectors often require a minimum pressure for good aerosolization

[@sirseven3]

@@gupti I'm talking oil pressures not fuel. At the end of the video the oil pressure was high causing leaks which indicates a flow issue or too much pressure. Pressure =/= volumetric flow.

[@patrick1112223]

you're partially right, even with high flow, you can have a bearing come out of tolerance and cause low preassure

[@sirseven3]

@@patrick1112223 no I am fully right, if the tolerance opens up then that is more area for the oil to flow. It is a lower pressure but allows more oil to flow. Because the tolerance is larger it will lead to a failure eventually but in this hypothetical it's still supporting what I am saying.

[@patrick1112223]

@@sirseven3 true, but I think u get my point😁

[@mstrdtiger]

If you want the rear to be more planted on corner entry weight shift, you can toe in the rear a little. Having it toed out makes your car 'slippery', or kick out, act nervous, shift wierdly under weight transfer and generally try to kill you. Toe in keeps it planted in the rear.

[@JoeMadds0]

Great content Rob! But I'm worried about Isaiah, what's he been up to?

[@Borgschulze]

@Rob Dahm Please tighten your hitch ball... that's an accident waiting to happen.

[@elideville]

4:48-4:58 is such a mood. Thank you for the video Rob ❤

[@Taverius]

Sounds like your diff preloads (too much decel) or your damper settings (too much rear rebound) are off? Could also be roll center/antidive depending how much you lowered it.

[@Iseenoobpeoples]

Does he even have a clutch pack LSD? Looks like Open/Torsen

[@QMan1234red]

Rob would you ever track the Diablo? Maybe at a motoring club? I know thats your baby but would love to see that thing get some screen time doin what it was made for.

[@Kopa_Malphas]

Rough 2 days for sure, but man, that's how it is...especially with a weird engine swap car that is practically a bespoke build. A lot of trial and error. Keep killing it dude!

[@a1jay124]

I love the whole catalyst track overview looks amazing and is very insightful💯

[@housearea]

I love the jumping around the cars on every episode!

[@NFSGamerful]

Ah sick! You went to dirtfish! Can we expect a vid on rally driving soon?

[@chrisf2726]

that camera setup for the car on track at 8:18 is nice

[@WarShrike]

Time for some rotor shaped tail pipes lol. Car sounded awesome. If the oil leak gets taken care of and ruled out but still experience the weird ABS behavior, believe you might be experiencing the dreaded GM ICE Mode. Terry Fair at Vorshlag has a solution for the C5 using a BMW ABS module.

[@shadywhisper8455]

The on-power = more traction thing is quite interesting, thought I'd offer help if I can. To me, it seems to be caused by a suspension stiffness issue. I'm not sure how the weight distribution compares to a stock Corvette, but I presume the rotary (even with turbo and all other accessories) would be lighter than stock, leaving the rear end to be heavy. Off throttle, the rear end will want to pass the front due to too much weight transferring to the front tires, leaving the rear end loose and like a pendulum. On throttle however, the weight transfers to the back and gives enough traction for what's needed. (Think Classic Porsche 911) Other than adding/ striping weight to solve this, you can stiffen the front springs, and even go so far as to lift the front ride height/lower the rear. This helps keep the weight toward the rear for more bite. Tuning handling (without downforce) is 100% about weight transfer and how to manipulate it. Learning how to tune became much easier once I thought of it like that (at least for me). Hope this at least gives a few ideas! I don't remember the full journey this car has taken and what suspension mods are installed (or the full extent of your knowledge), so hopefully this didn't come off as classic "Internet Snob"

[@KingTroopa]

lift off oversteering, gotta be more gentle on removing accelerator pedal if doing so midcorner. If I am understanding correctly atleast.

[@teabee44]

HELL YEAH!

[@robertd8164]

Sounds a lot like power off oversteer which is great in a front wheel drive car but rather disconcerting in rwd. Try softening the dampening / rebound in the front shocks or increasing it in the rear. Same with spring rates. Tyre pressure can make a huge difference as well. Less pressure in the rear vs fronts will also help induce oversteer when coming off the throttle.

[@LuxGamer16]

Let me tell you, rev match in a daily is a blessing. Really smooth ride

[@lawrenceh.7011]

Rev matching via heel & toe (also known as "blipping") is a skill every track driver should know. Practice, practice, practice!

[@amnesite3573]

As someone who just enjoys beating on & having a bit of fun in their lil' old car, what is blipping?

[@anyau]

@@amnesite3573 press throttle when clutch is down to bridge revs up

[@SaulHeno]

@@amnesite3573 tap of the throttle while the clutch is in while downshifting. Helps better match rpm to the gear youre dropping to and stops the car lurching. I do it in my work van daily its fun :)

[@amnesite3573]

@@SaulHeno I've been doing that in my car too but I didn't know there was a name for it 🤔.

[@amnesite3573]

@@SaulHeno new question, is there an extra trick for downshifting like this from 2nd to 1st without hurting the transmission?

[@jimcarriesa1911]

I am glad I am not the only one to notice the ball having play in it. I ran it back 3 times and slowed it down to confirm. Lock washer should do what it do but best to double-check its tightness. The general rule is for a 3/4" shank tighten to 150 ft/lbs For a 1" shank tighten to 250 ft/lbs, and for a 1-1/4 inch shank 450 ft/lbs.

[@racerx2084]

Get yourself a Mr. Buddy Heater, they work great. The single bottles last about 4hrs do get the bigger dual bottle one. They have a wall mount also.

[@MHSDankusPotatus]

Dudeeee the glamours on the Vette under the trailer are damn gorgeous

[@TierManDag]

Ahahahhahahahaha, funny as hell after everyone roasted him about his driving last video

[@dustinh4175]

I just realized he might not be exhausted. Might be some super dabs

[@fishua5564]

Can tire warmers be used as heated blankets? Asking for a friend.

[@krnt13]

I noticed that the car lifts the rear and seems to get into positive camber during braking, you can see it leaning the weight of the car mainly on the outside of the tire, not sure if it is related to you lift oversteer but might as well look into it.

[@bryanrosenberg1552]

I have a 2019 ZL1, rev matching has me spoiled. Cool to see you could add it to old cars, I can't go back to the clunk lol

[@dustinh4175]

Hey they gave you a break, sweet. Welcome back

[@MrZemIan]

Giving it some gas while turning makes perfect sense. You always want to apply a tiny bit of aid gas in lack of a better word for it. Not really enough to accelerate but just to keep the speed. Helps keep the car stable when cornering.

[@XboxUnitD77]

when you are off throttle the car will naturally turn in more, when you are on throttle the car will tense up and turn less sharp as it wants to go straight more. By holding a tiny bit of gas you keep it neutral. while that may help in some situations, what you don't want to be doing is changing throttle input so much that it upsets the car. Next slow corner you take at some speed, give and take away throttle slowly and you'll feel how the car turns in and out of the corner.

[@MrLowe-on8kc]

Pure Michigan ✊🏽✊🏽✊🏽✊🏽 I'm in Michigan and right now the weather sucks, no V action at all 😢

[@zenmoto369]

7:20 Hey Rob, an idea, prepare the 4 rotor for Pikes Peak and ask him to drive, let's see what happens!

[@matthias18]

God damit missed you rob

[@AnimaEterna996]

you should try to get some legs for that awning, one good gust of wind will bend the roof beams and it'll never go back in

[@jacobboone6078]

Tighten the hitch ball bro

[@TKDWolf]

I would be interested in bringing out my mostly-stock, pretty much 100% factory parts C5 Z51 that I have set up for STU class (SCCA Autocross) to compare to the Rotary Vette. (It has Z06 suspension + bilstein b8 shocks, oil cooler and oil pan baffles, delrin control arm bushings, and different rear sway bar). Got laid off so road trip sounds fun :)

[@ActionScripter]

Always love seeing Corvettes tearing it up at SCCA. It's way too much car for AutoX and that makes it all the more fun.

[@Kenshin_Tran]

lol i love how honest you are, i fuking suck at rev matching so imma let this computer do that shit for me. work smarter mentality. love it lol. good shit and damn you got you moneys worth from that trailer. that awning and lighting is dope af.

[@relatabl0]

"Scientifically proven, that this car fucks😏" -Rob Dahm hahaha, i love it!

[@xTinBenderX]

Building, tuning and sorting all vehicle's settings are usually diff steps. Rob does them all in one video. Was gonna say, "Get in with an instructor or like any of the top trusted pilots at the track to give you some car feedback. Either from the pass seat or driver's.

[@dadhats]

hope you get the setup fixed! there's plenty of time left to be found once it gets dialed in! not sure what your suspension setup is but I have a feeling that light weight rotary up front is affecting the balance of the car, you might need to try different spring rates

[@jamesmullen4308]

Just having non-oiled tires might make all the difference in the way it handles.

[@quinnemery1228]

Always Cool Rob, Isiah and Joel!

[@RX7FDfreak]

Dude I was like damn! Something bad happened. Who didnt put gas in it? Lol

[@kumakaroshi117]

Beautiful sound

[@lolololol2791]

Ik it’s sounds crazy (kinda counter intuitive) but lack of body roll of the chassis will cause u to have to gas it through the turns. when gas it it will force the suspension to tweak more and grip up on the outside wheels vs no gas u will scrub your tires and slide as your grips on the inside tires. Idk if u have any chassis braces or really stiff sway bars (specifically in the front) but I’d look there for answers)

[@Kurtster600]

I rev match perfectly with help from this video’s sponsor, KEEPS

[@valentin7746]

2:14 best moment 🤣

[@sumatrican5990]

Such a dorkfish. Got to love him

[@lilboi630]

Lets go early access!

[@dertmatyui]

It needs a big WANG! and reminder when you spin out… clutch in, hard on the brakes, when you just roll and turn around people may try and go inside (like that white car) and you will just smack into them

[@Berm_Blaster]

Does FabDaddy Isaiah have any desire to drive on track? If he does he deserves a few opportunities to drive. Hes always at the track wrenching and filming but doesn't get to drive. I would get frustrated even tho I love wrenching more than driving its nice to get a chance to drive once in awhile.

[@lukaszM46]

how does it know you are about to downshift? it needs to know before you release the clutch pedal right?

[@LeoTonius]

Any one else noted the tow ball nut is loose? 2;46min in.

[@rimka11]

Judging by the symptoms, you have a healthy MR2 :D That suspension is fine.

[@merkel_user]

Daiuumm booaiiih that revmatcher is going to get the cops on y'all

[@91ludesit]

How are you detecting which gear the car is in?

[@tedheierman1181]

Do you have the OEM interior door panels on this car?

[@josebriceno97]

It’s about weight transfer. That’s how it works when driving at the track. When weight shifts to the rear due to acceleration there’s more grip in the rear tires. That one way to overcome oversteer. If you are oversteering hitting the brakes in the corner makes it worse.

[@Ckcdillpickle]

Do people have issues with rev matching? if you can't rev match how are you even driving a manual in the first place?

[@Niickizi]

Heeey I was that white crx that spun right behind after you spun lol good times

[@robertleonardi]

Where has Isaiah been

[@firebry23]

What's going on with the 12 Rotor?

[@NorwayVFX]

They are currently doing R&D on the external parts needed for it, designing and simulating stuff.

[@ttsupra87]

How did I miss a rob video!!!?? KZbin notification slacking

[@angrymitch1566]

2:47 tighten your hitch ball, would hate to see one of the cars wrecked over something so small yet commonly overlooked

[@scottpilcher473]

That telemetry is so cool 😎

[@billyverduzco2337]

I just got my first rx7 and bought a spare 13b, please teach me your ways!!!

[@connoisseuroftigolbitts]

Go back and binge all his rebuild videos You’ll learn alot

[@sberry80]

Where is the 12 rotor content rob? Love all your video's,. But been waiting on 12 rotor content for 6 months

[@280zxNate]

What haltech are you running rob?

[@motogeee510]

I think u an crew can an will figure out how to make better fittings for those things an even if higher oil pressure or gas pressure aren't need who knows how much safer you will feel an how much harder you could push the limits of all ur builds by doing so man yall got this ! 👍 ❤

[@linuxguy1199]

2:46 That ball is loose AF, you guys need to tighten that before you loose your trailer!

[@Caterisma]

FDs will rotate the same way off throttle but the FD chassis can attack corners better that’s why you experience lift off oversteer more FCs are where that shines through a lot and a lot of times sideways is the way you attack the course in an FC just due to how they want to handle (not overgripped) it’s like how the aw11s and ap1s had notorious oversteer issues is from lift in corners left foot braking helps a ton if you can dial in your technique cause you can start brakeboosting a little at the beginning of the turn in and take off way faster

[@cecilwilliams8468]

Where is Isiah?

[@CluelessUri]

Ever looked into a "Toy Hauler" but for a car in your case? im sure they would love your reach into car venues vs just camping

[@gavingriffith37]

Issue with toy haulers is the room for a vehicle isn’t made for cars, bought a $70,00 toy hauler when I had a formula vee and it barely fit, bought a spec Miata and it is absolutely way too big AND way too heavy even with it only being 2100 pounds, toy haulers on paper are a great middle ground but realistically cars, especially rhabs, are just too big and too heavy for them

[@petetofani4896]

Trailer lights are great.

[@ThePandasian34]

AYE THATS MY White CRX in the background, and the car that spun out behind you lmao, sorry for photo bombing you 🤣

[@extec101]

cant say i know the rear hooking to the ground during power what it is but it sounds a bit like it got good amount of antisquat.

[@Kernewek_Gaming]

Have i missed something, wheres Isaiah these days?

[@andrewable2634]

He's been out living his life. Its mostly just Ethan, Joel, and Rob now. Not sure if thats subject to change.

[@PH03N1X_83]

Session ended due to blinker light fluid leak @19:38

[@DallasGarage]

Patreon crew unite!

[@ianm432]

The breakup coming out of corners is traction control im pretty sure. For the small investment, pick up a Chinese diesel air heater. They use so little diesel and pump out a bunch of heat.

[@krakdaus5442]

I used to suck... I still do... But I used to too.- Rob Dahm

[@sirseven3]

"Scientifically proven that this car fucks" should be a t-shirt like yesterday 😂

[@sberry80]

Are you gonna keep the C5 as a 13b car or eventually add a 3-Rotor?. Either way I live it. It went from being a troll on chevy guys to being a solid car

[@kevpatt]

Rob is real. No denying it.

[@theshippingcontainergarage]

"This car has been sitting in the corner of the shop getting no love..." sad 4 rotor noises

[@izzy4real311]

Ye'h rite; I hate those round about's !!!

[@klmx6]

I know you already invested in this but if this engine ever blows a 4 rotor would really suit it especially since gm was gonna do one

[@dankolicious10]

It might be suspension settings, but dripping oil under the tires doesn't help the tail stay in line either.