More Turbo Power! What can you do to make more HP per PSI of Boost?

[@henrysordia9844]

This guy is awesome...I hated school when i was a kid. But i will sit in any class this guy gives.

[@richardholdener1727]

Henry Sordia I don’t want an apple from my students but I do accept waste gates, Turbos or nitrous!

[@henrysordia9844]

@@richardholdener1727 lol...Damn dude I am down the rabbit hole now watching all your videos. Good stuff especially the LS 1000Hp since i am trying to build one at the moment.

[@richardholdener1727]

Henry Sordia enjoy the journey

[@exploranator]

The fact is that the engine needs to inhale and exhale an amount of air per hp. A) Bigger valves B) More lift/longer duration C) Faster opening and closing of said valves, as in roller cam behavior over relaxed, lazy, stock valve speeds D) Removing all restrictions possible from the intake and exhaust plumbing, even if the gain is somewhat minimal, as in, long tube headers. Then, temperature management: E) Biggest aftercooler possible. Dropping temperature to ambient is never bad for power. F) Aggressive cooling of the heads to enable maximum timing G) Aggressively insulating exhaust tract to preserve the precious exhaust gas energy to the turbine H) insulating the turbine housing More on breathing: I) Huge intake and exhaust ports to make sure they are not the bottlenecks. J) air intake that is fed from a reliable high pressure zone. K) large exhaust pipe diameter after the turbo(s) and Borla-style or just straight-through mufflers to reduce pumping losses. I have more to add, but it needs to be patented, so I will just leave this as is.

[@cameronwaters5695]

Richard Holdener, I would love to see some lower octane fuel (91-93) testing because alot of guys do not have access to e85 or want to run race fuel. Love seeing the amount of work you put into this stuff!

[@richardholdener1727]

I don't do much pump gas stuff unless its NA. But I can show you how much the reduced timing costs you in power. Got a vid or two on that coming up

[@andrewdwyer6848]

@@richardholdener1727 I'd love to see it as well, the nearest e-85 is a 100 miles from me. After watching one of your videos with meth injection I'm scared to use it and go above the 10 psi I'm at now(saw video after I bought the kit) with the stock intake. will a high ram distribute the meth better in your opinion?

[@YZFoFittie]

@@andrewdwyer6848 meth injection is tried and true, but you get what you pay for!

[@antwain7942]

@@richardholdener1727 have you showed the video of how much reduced timing reduces power. yet? I may have missed it. I hope your getting payed for the time and money you put into these videos without commerciales!

[@thraxbert]

The big thing: 1. Make the NA motor more powerful BEFORE forced induction, so the "multiplier" of boost has a bigger impact. (Example: intake, cam, headers, P&P) The little things: 1. Size of the turbo compressor/turbine matters. Make sure it meets the airflow needs of the power you want to get to. 2. Reduce intake air temps (IATs) via intercooling, active chilling, intercooler spray, etc. The cooler/denser air makes more power and is safer. 3. Make sure your downpipe and exhaust are as large as you can possibly fit after the turbo. More is always better, and spool is better.

[@MWR-lg9qp]

Once again I'll say it. You sir are a genius! Your ability to explain the complex engineering at play in a way that is so easy to understand is amazing. Thank you.

[@0727Mtl]

Legit video, keep up the great work

[@richardholdener1727]

will do

[@Craigy82]

Longer vids are the bomb. Thanks mate

[@richardholdener1727]

go some lengthy ones on the way

[@sstevocamaro]

OG Richard was THE MAN!! Love the new Richard too!!

[@Hamza-or7jm]

I love the way your videos are structured simple yet detailed.

[@c-moneycantrell]

Super helpful,,, truly appreciate you making it simple for all of us and sharing the wealth of knowledge you’ve worked so hard to obtain,,, thank you!!!

[@chriscampisi5452]

Thank Rich that was great. Chris Campisi

[@martintran7837]

School maths has just teach and practice on books, but I collect more explanations like your videos that help me go short cut.

[@hu3.789]

@Richard Holdener - How do most people apply what you're suggesting to their own cars? When you apply your formulas, the engine is connected directly to the dyno. Most people don't remove the engine from their cars to get a dyno reading. They get their dyno readings at the tire. I used the calculation on my car to see what I would get. My 3.7 V6 Mustang produces about 250 horsepower and about 240 foot lbs of torque stock. I Procharged it and at 9 lbs of boost my car now produces 420 horsepower and 352 foot pounds of torque on a Mustang Dyno. Stock my car my car produces about 17 horsepower at sea level. Under boost it produces about 17.7. The formula seems to work as an approximation. I think what happens is that the drivetrain losses decrease as a proportion while the power used to spin the supercharger increases as RPM increases. I would think that the horsepower per pound of boost would increase at the tire with a turbo because it is more efficient than the supercharger.

[@UnityMotorSportsGarage]

Brother, this Video was amazing...your Physics class was spot on where anyone can understand what you are saying!!! Keep up the great work... I have always admired your work.. I have your Ford 4.6 Book. You also inspired me to start my own channel!

[@ToddDavey]

So great to see you have a channel for longer videos. You need to tell the story behind the Porsche 917!

[@richardholdener1727]

it had a 12-cylinder Ferrari TR motor in it

[@ToddDavey]

Interesting, any place where i can read more about the car?

[@richardholdener1727]

@@ToddDavey not that i know of

[@rotaryray]

29.4 psi will theoretically increase power by 200% , but at some point you will run into diminishing returns because of the heat of compressing the intake charge among other factors.

[@richardholdener1727]

unless you run a good intercooler -like our ice water on the Big bang motors.

[@n8_b123]

Usually cylinder pressure is high enough your begin to get octane limited, at 29.4psi in most applications your exceeding 1:1 boost / backpressure ratio, exhaust backpressure post turbine comes into play, pressure drop accross the intercooler core etc etc.

[@samharveyb]

What a well made informative video! Great job

[@viciousrap700]

@Richard Holdener, you've asked what we'd like to see so here goes. You do so much LS stuff that's interesting, informative and entertaining and I think it's great but there are still those of us out there with the Pre-LS GEN2 LTX engines. We're seeing growing popularity in our platform with turbos as well and seeing some really fast LTX 4th gen cars. I'd love to see you share a bit of love with our older LTX, maybe even including ditching the notoriously problematic Opti distributor and showing us how to make the Holley system work for us. LS PCM swaps ate becoming more and more popular with us but I'd kinda like to see an aftermarket ECU working and throwing some boost love at the LTX! Thanks man!

[@user2917]

Thanks for great information but what about fuel injectors size thanks

[@deathunit1]

Uncle Tony told me to check you out. Subd

[@richardholdener1727]

welcome-Tony does great stuff over there

[@markdogbone1969]

I been following him for years in muscle mustang magazine i used to read all his articles he knows his shit for sure!!!!!

[@richardholdener1727]

thnx for the OG support

[@masterz28]

Hey, I recognize that wrecking yard anywhere. lol he goes to the same one I do.

[@Rivermarx]

Sweet sweet knowledge per usual from the great holdener 😎 keep it up my dude we love it!

[@boosted2813]

Glad you posted this, Hope it opens some eyes, Hate the phrase this 5.3 responds to boost so well.. All engine do.

[@mirage2991]

Sloppy Mechanic has proven many of those 90% things you are talking about. He is one of the pioneer of the 1000whp junkyard combo that wasn't a one hit wonder...from testing cheap Chinese gates to re-using head bolts...eye opening...inspired me to go LS turbo 5.3 on my latest hotrod for a fraction of the cost of what a build 496 would have been (my last BBC was a 496, still have the receipts that stated it wasn't cheap lol...anyway love your videos!

[@overlordisgoogle8431]

Your channel is gold thank you for sharing.

[@RyanlaBlue51]

Love your videos. By far the best info to date.

[@richardholdener1727]

thnx-tell 1M friends

[@RyanlaBlue51]

I sure will I’ve been trying to build a twin turbo LS swap in my 76 c10 for two years now. Flooded myself with videos to learn the right parts to use and how to do it. I can’t afford the trial and error especially the errors. I would love more info on ring gap and fuel injectors.

[@richardholdener1727]

Ryan LaBlue gap to .028-.030 and get big injectors for the required hp level -let me know the power level and I can help with sizing

[@RyanlaBlue51]

Thank you Sir! My motor is a 4.8 I’m running a Elgin cam. 283 Intake Duration, 286 Exhaust Duration, 228 Intake Duration (.050" Lift). Motor is from an 01 Silverado. I have a 4l80 trans no converter yet. Stock truck intake. Cathedral heads. Fi tech ultimate ls wiring system with trans control. Twin turbos from vs racing. Twin 61/62 T3 Special v-band discharge 3" .82ar. No intercooler yet or injectors. Was shooting for 600 ish to tire.

[@richardholdener1727]

Ryan LaBlue that should be easy

[@BigMikesGarage]

Love the video as always. You do good work. Thank you. One minor nitpick...because I'm a little OCD. In the math you wrote .68% which would actually be .0068. Either the 2 position decimal or the % sign, but not both(unless that's the actual number).

[@richardholdener1727]

I see now-I never said I was smart!

[@BigMikesGarage]

@@richardholdener1727 I disagree. I think you are very smart. I love the way you explain things, and try to make your comparisons "apples to apples". Thanks again for what you do!

[@j.skinski9730]

Awesome video! I love the beginner/90% aspect of the video! I'm just starting to research forced induction and you make the info easy to understand! I'd love to see some tests with carburetors vs injection, and engine management! I subscribed, and told my car friends to do the same!

[@richardholdener1727]

I have run carbs vs computers a lot!

[@Samuel_el_toro]

So you're the one pulling all the 5.3s at Ontario Pick a part? 🤣

[@richardholdener1727]

Samuel Morris yep

[@JohnDoe-ft8zs]

Ya where are all these 5.3 lol. I see lots of holes where a 5.3 would be.

[@henrybrown1063]

I would like to see using liquid nitrogen used in a intercooler application to cool the inlet air charge to get sub zero temps

[@oscarcabrera3478]

Dude I would work for FREE for u if I didn’t have a wife n kids Seeing u in action with sooo much Passion is contagious Thanks u for all u do Can’t wait for the SS2 vs the world test I can’t wait to run my LR4 wearing LS1 heads with a blow through carb being fed by a ebay GT45 with a 1.05AR. It’s all stuff u tested. Let me know when u start a Academy PLEASE 🙏

[@johnboy9769]

Love the longer videos

[@richardholdener1727]

more on the way

[@hooligans_garage7465]

I do as well.

[@CrossCudi]

Awesome vid !!

[@bludogfam7]

Most informative and educational information on the web. I have a 08 Silverado. I put a on3 turbo kit on the 5.3. 70mm turbo , dod delete vvt delete. I turned boost up & lifted heads. So. I bought a ly6 6.0 to put in truck. Put a LSA cam in it out of a 09 ctsv. Then I put a on3 78/75 billet wheel turbo on it. I'd love to know if you have any recommendations for me going foward. It is a daily driver but I like to be able to hurt feelings of the mustang ,camaro and challenger guys.

[@MJTAUTOMOTIVE]

Thanks Richard, Looking forward to the up coming videos. Subbed. 👍

[@richardholdener1727]

welcome aboard

[@inspector13jjf]

This is great! I'm always looking for more power with my Typhoon. My goals for it are going to be pretty hard to reach as it is & I'll need all the help I can get. I look forward to future videos.

[@Mrrockbucketman]

I watch all your videos and love them all. So much good information. Keep up the great work!

[@Thehouseofboost]

Great Video Richard!

[@richardholdener1727]

Thehouseofboost thnx

[@boosteddartls2833]

Lots of great info, looking forward to learning more

[@nicklockard]

Have you tested pre-conpressor water injection?

[@richardholdener1727]

THAT IS COMING

[@farleyskennelsandoutdoors6499]

Great video so glade someones finally doing some testing!! Starting my first build 5.3 with BTR stage 2 turbo cam and a ebay gt45 turbo this week all going in a lightweight foxbody!

[@richardholdener1727]

We've run that turbo a lot-its good for 800 fly hp!

[@farleyskennelsandoutdoors6499]

@@richardholdener1727 thats good enough for me for now car should be under 2800lbs and powerglide with transbreak. Any suggestions on what heads to run? It currently has 317s from the previous person wanting to lower compression for some reason

[@richardholdener1727]

@@farleyskennelsandoutdoors6499 Stock 706/862 heads would be a lot better

[@PBMototsports]

Could you possibly do a test on ata and atw intercoolers on an na motor? I think it would be an interesting video to test the importance of reduced charge temps on na vs boosted applications.

[@tptrsn]

Fantastic video Richard!! Can't wait to see more. :)

[@richardholdener1727]

thnx

[@XHikotheproX]

Not only the airflow of your turbo manifold matters, but I think that the heat and pressure differential matters more so the closer and shorter path from exhaust port to turbo is going to make for a more efficient turbo setup. Edit: dang I was wrong.

[@bikerdillagaf1265]

Richard you are truly gifted i am thankful for all you do to help us make educated decisions

[@tensixtythreevideo]

Love the videos. Good stuff

[@chriskruger4157]

Awesome as usual please do a blow through carb vs intercooler temp difference

[@danielsullivan9865]

Probably going to have issues with the stock valve spring holding the exhaust valve open killing the horsepower. Need really good springs for back pressure and some Holley smart coils for additional Spark

[@richardholdener1727]

we include spring upgrades to go with cam, but the stock coil packs work well with the right dwell

[@craiglloyd7185]

Love your videos Richard, please keep going with them mate. I would like to listen to your thoughts and experience with compound turbos.

[@markbuskens6070]

Thanks again , great information as always👍👍

[@johnhughes4202]

Great vid! Do more Mopar stuff. Thanks

[@emma_freerider]

Hello Richard IT would be awsome if you make some tests in the 3.8 ford supercoupe motor, im swapping the supercharger for a turbo gt35

[@jessemurray1757]

Sort of like, why would I install a TVS 2650 instead of a TVS 2300 on my stock LT1? Efficiency and room to grow. What's lag? Keep it up Richard, I'm liking the longer video format. I'm looking forward to the Turbo back pressure video. A friend of mine has a full length 3" catback on his turbo Camaro and I've been telling him he need a 4" dump.

[@richardholdener1727]

for turbo exhaust, bigger is better

[@jessemurray1757]

@@richardholdener1727 agreed, differential pressure

[@arr7561]

I want to see a 1999-02 Saturn 1.9L turbo charged engine. Yes I know but I thought I would give it a shot lol. Project 2 is a land speed car with that combo . 99-02 used the same style rods that LS engine run

[@richardholdener1727]

I raced in SCCA orld Challenge when the ICY Saturns were running. Good stuff. I have set a few Bonneville records-Including my 227-mph Honda Civic.

[@arr7561]

Richard Holdener awesome! I’m going after Lisa’s record and I want to do it with a real Saturn not a general motors 2.2 eco-tech. So for I think my biggest restriction is going to be RPM as I do not have the aftermarket support for different gear ratios. I know the connecting rods that hold up to 30 pounds of boost but realistically long RPM runs probably 18. I plan on running the 1.9 L twin cam from a 95 to 98 the bottom and from a 2002 because it comes with the girdle when did tray and some rods. And a manual trans out of the single cam car . Over the years I have talked to Turk about this and he’s answered all my questions except for one because he doesn’t have experience in it and I see you do. And what were if any difficulties you had at slowing that car down being that it is a front wheel drive car?

[@kevinmartin7257]

When’s the turbo exhaust vid coming?

[@richardholdener1727]

patience young Jedi-I'm knee deep in broken lifters right now

[@kevinmartin7257]

How about a vid showing the difference from a stock non ported head vs an aftermarket head with turbo application

[@markalanspencer]

Great video! I would like to see a comparison betwee equal length tube headers and unequal length tube headers on a turbo application. Is there a difference in backpressure or performance? Thanks! Most inline and v engines won't really encounter this problem, but in a boxer application equal length is sometimes hard to fit in the car with a single turbo

[@richardholdener1727]

I have run tests on equal vs unequal headers-minimal difference

[@3800TURBO]

Im not sure what our 3800 would make NA. She made 590whp@14psi. I remember because at the time it was our base gate spring. Hard to beleive she would make near 300whp NA. I guess its possible. Love the vids Richard. Keep uploading.

[@richardholdener1727]

Track Days. The math says 280 hp na which seems healthy for a 3800, but with the right heads, cam and intake that’s only 73.5 hp/liter-the equivalent of a 368 hp 5.0L ford or Chevy! That’s not hard with decent parts.

[@3800TURBO]

@@richardholdener1727 she made 1000hp @29psi with the twin gtx3582r and a big W2a and e98. Still stock block and crank. At the wheels. Not at the crank. So I guess you can add 20 odd % to that as well for losses. So at a rough guess 1200 fly.

[@rickyr7790]

It would be awesome to see how keeping the same AR and changing to a turbine larger wheel would work with exhaust flow and boost. Also turbine clipping! No one has done any professional comparison / testing

[@justavillain]

What about a turbo with nitrous? That would cool the charge air, added to the intercooler????

[@richardholdener1727]

i have vids coming up on using nitrous as the intercooler and using nitrous with an intercooler

[@littleherms3285]

And you don't need much, a 50 shot works wonders on inlet temps. Gives you more like 75 to 80hp actual because of the boost. Win win.

[@redlinepullers3277]

I would love to see u put a nissan VQ40DE to the test. I have one in my truck and can't find many parts to upgrade the power output. As far as I can see there similar to 3.5 and 3.7L that are in the Z cars. Every thing I can find said that it has forged internal. If u can find any info I would appreciate it Thank for your time

[@richardholdener1727]

Ill ask around

[@redlinepullers3277]

@@richardholdener1727 thanks in advance

[@simpleman2004]

Check out Brian Crower on the web, he has some Nissan stuff. Dig around on his site and there is some nissan stuff in there, I was looking at some cams the other day.

[@redlinepullers3277]

@@richardholdener1727 any luck finding info on the VQ40DE

[@richardholdener1727]

@@redlinepullers3277 NO SIR

[@VI0LET539]

Dry ice back in the day was perfect to cool your intercooler and port the trottle body for your ac line

[@n8_b123]

Well, in your theory, the 300hp engine running three atmospheres (29.4psi boost) would make 900hp. To account for compressor efficiency, exhaust restriction (cant always run an open 4 inch exhaust outside of the dyno) id assume an efficiency of around 87% (first atmosphere of boost is usually almost double, but the second and third usually get up in cylinder pressure and you get octane limited) so 300hp of engine with two 87% efficient atmospheres of boost at 261hp each would make it a 822hp combination.

[@richardholdener1727]

winner

[@jasonfikes9514]

What are all the roles of a waste gate? My little understanding of them is to release the pressure when you take your foot off of the gas pedal, do they have a job to do when you are In the throttle making boost?

[@richardholdener1727]

what you are describing is the blow off valve. The wastegate dumps exhaust before the turbo to reduce the boost pressure produced by the turbo

[@jasonfikes9514]

@@richardholdener1727 ok, thanks for sharing.

[@jasonfikes9514]

In theory at 29.4 psi , I would think it would triple in power. For example in my thinking is 300 h.p will become 900 h.p under boost.

[@richardholdener1727]

exactly

[@Spudstrodamus]

In theory yes but in real life probably not

[@richardholdener1727]

@@Spudstrodamus Its harder at that boost level

[@robertelmo7736]

KAboom! LOL

[@richardholdener1727]

@@robertelmo7736 but with style

[@keithaxtell7457]

Now I know that A/C takes away from HP but would it be worth it to integrate some kind of set up in the intercooler from an A/C system?

[@MrZX1206]

I remember the article you wrote about the Kenne Bell 302 that made 500hp. A few of the cam sizes got messed up in the dyno charts but I think the conclusion was the XE274HE was the one you used to get the 500hp. What was the compression of that engine? Could the combination be improved on today? I would also be interested in seeing what OEM ECUs have done to power through the years.

[@richardholdener1727]

Yes-EX274HR cam and there is a lot more power to be had but the stock block will ultimately limit that-I wish there was an iintercooler

[@Go4BrokeOffroad]

Richard Nye the horse power guy! Hahahaha. Awesome video sir.

[@richardholdener1727]

The best!

[@mikeeiben3430]

Is it true that you don't want torque converter stall speed to be too high on a turbocharged engine because you need to load the engine to make boost?

[@pmd7771969]

You need to take full advantage of intercooler e85 and boost so 1400 hp to perhaps 2000 from a 427, 454, 496 is doable. Boost till you detonate. Bloodviking

[@pmd7771969]

Most engines that are streetable make 1 to 1.2 hp per c I. So if you can do that on 9.1 mechanical compressi9n then boost your combo to 8 psi then pump gas works and you won't double hp but it's still alot. So 600 is obtainable, so on 20 psi boost to double your initial n . A figure run e85 and get 800 to 1000 hp from e85. Bloodviking

[@byronhoesman7643]

I was wondering what you thought of 862 heads . That's what is on my 5.3 factory

[@jorgelozada5582]

have a great channel man congrats...ls powerrr

[@muaminhugsy4964]

Love this channel 👌

[@ryder2shae]

What's the world do without you, Richard?

[@tomrados7512]

Have you ever done testing with propane? A place I worked at had turbo Ford 460 generators they were natural gas though. Ran good but weren't attached to a dyno.

[@boosted07rodeo14]

awsome ,.... my vortech blown ls1 makes 450hp at the wheels on 8 psi , with 10 per cent overdrive balancer and pulley change 12 psi should see 540hp . excellant power for an unopened stock ls1

[@richardholdener1727]

sounds like fun to me

[@fartnuggets3155]

good shit brotha, keep up the good work ;)

[@jimkillen1065]

I really appreciate all of your videos and information . Have you ever written a book or on video or tuning and or builds like how to build a 6 . 0 ls that can run pump gas boosted and be able to spin to say 6800 and make 900 plus hp . This may not be possible , perhaps less hp . I dont mind paying for good information its a lot cheaper than broken parts

[@richardholdener1727]

I wrote 10 books-none of which will answer that question. but videos are up for 6.0l builds

[@christianteddy]

if i’m not mistaken, atmospheric pressure changes from place to place. so what exactly do you mean atmospheric pressure, and how do you figure out what the atmospheric pressure of an engine is? is it based on conditions in the area you live in? or am i missing something?

[@richardholdener1727]

atmospheric conditions change with temp, pressure and altitude-the formula assumes standard pressure and temp

[@hooligans_garage7465]

I really appreciate your videos!

[@richardholdener1727]

Ill keep them coming

[@Hatcher426]

I thought there were some pretty good gains found when back pressure dropped changing from holley turbo manifold to header style hot side?

[@onecheekfabadamwilliams8346]

Where can I see this?

[@Hatcher426]

@@onecheekfabadamwilliams8346 I thought it was a vid he did because they measured back pressure and boost levels for both. it wasn't huge gains but good enough for me.

[@richardholdener1727]

I did a test on the Holley manifolds vs tube turbo race headers-that video is not up yet but at high power levels, the Holley manifolds are not as good as the race headers. But they were not designed for 1000+ hp stuff.

[@Airman..]

Great mentor

[@davidbradley3982]

have you done any testing?.

[@richardholdener1727]

Thousands of tests for the last 25 years

[@MrShawnc992001]

Would it have made a difference spraying the nitrous into the turbo? That would be a good video.

[@richardholdener1727]

i might try that later

[@MafiaboysWorld]

Using this theory, would it be better for throttle response to use a pair of 300hp turbos on T2 flanges as opposed to a bigger 600hp single on a T4 flange? Overall the size combined of the T2's flanges are slightly larger than the T4 so it would be interesting to read your opinion.

[@richardholdener1727]

a single at 600 hp on a 5.3L V8-that would be plenty responsive. So would the smaller T2s, but probably too small-even for just 600 hp

[@MafiaboysWorld]

@@richardholdener1727 I should've been more specific in my original question to you Richard, my apologies. I have a 1JZ so only 2.5L to play with. I know a 600hp T4 turbo makes them laggy off the line (3582, 3076, etc.) so I'm looking at twin 2860s or 2867s off the T2.

[@boatherton3018]

love these videos. I believe at 29 psi the point of diminishing returns will start to play into power output

[@richardholdener1727]

Ive only run that much twice-both were successful-one on the Gen 4 6.0L Big Bang and the other on my 2.0L Bonneville Civic B series

[@GnarshredProductions]

there actually is no point of diminishing returns, if you can increase the boost pressure while keeping intake temps under control you will make more power. I know people who run over 40psi of boost with subaru engines and e85 fuel, that is just what it takes to make an STI run 9 second passes i guess lol.

[@cmdr_stretchedguy]

Honestly, I just wish I could afford a fresh rebuild (4.8/5.3 with 862 heads) and 5lb belt run turbo on my 06 Silverado.

[@richardholdener1727]

Mike K4ISR that is a fun combo in a daily

[@briantownsend8425]

Is there an advantage to running twins on a big block Chevy versus a single turbo which one works better? I'm building one I'm building the engine part now trying to decide on who's induction system I'm going to use all I know is there's going to be a power adder for sure

[@richardholdener1727]

that ussually a fitment thing-both will work

[@csorse]

Does this formula work for single cylinder engines? Like on my turbo 125cc Honda grom bike.

[@philistineau]

Looking forward to the exhaust stuff. I’d love to see VVT on Gen IV examined/dynoed.

[@richardholdener1727]

philistineau wish I could run vvt-we Test with Fast and Holley which won’t run vvt

[@Darkhalfcustoms]

@@richardholdener1727 get Haltech to help out they know VVT.

[@richardholdener1727]

@@Darkhalfcustoms thnx for the heads up

[@ChadLisonbee]

Awesome video as always. Excited to see the exhaust video. But it makes me curious to see how a cammed N/A LS responds with stock exhaust manifolds, vs eBay headers, vs something high end. Is the juice worth the squeeze in the real world.

[@richardholdener1727]

i have a header test coming up that runs stock and cheap and expensive

[@ChadLisonbee]

Great minds think alike I guess.

[@t6378tp]

Would be nice to see non intercooled, vs intercooled vs air to water with a box ice comparison on a turbo blow thru carb setup

[@richardholdener1727]

ive done lots of intercooler testing-non ve IC, using nitrous as IC, IC vs non on carb application-the upshot is always use intercooler

[@t6378tp]

Could you post a link, I've looked on your Facebook page but can't find it

[@richardholdener1727]

@@t6378tp they are all separate tests on different motors

[@jackboi1383]

I Love your videos you can really learn alot by just taking the time and watching. 👍

[@thegrumpyoldmillennial328]

How about y pipe diameter vs spool time vs back pressure?

[@richardholdener1727]

The Y pipe diameter will not likely change spool time-and its difficult to measure on the engine dyno-the load is artificial and not like on teh street or chassis dyno. Spool rate is primarily determined by the power output of the na motor vs the tubos sizzing

[@thegrumpyoldmillennial328]

@@richardholdener1727 I have seen people neck down before the flange. The claim is the that the bottleneck causes an increased in exhaust gas velocity, which translates to better throttle response. Or it could be a crock!

[@richardholdener1727]

@@thegrumpyoldmillennial328 joining two pipes almost requires them to neck down but the turbine housing is almost always the restriction

[@has4896]

Saluting your hardworking sir...💯👏👏👏👍

[@juanmangerita]

Would 2 50mm turbos make as much as a single 100mm turbo ? Response on the small turbos prob better?

[@logical_volcel]

that depends on the flow of the turbos

[@turbomopie]

Bad ass, good stuff!

[@richardholdener1727]

Ill keep it coming-got a lotta mo!

[@junechris]

And then if we started with a billion horsepower and doubled it.........lol Just jokin man, so the exhaust after the turbo , being more important, what size should I run if i'm estimating my power goals of my Saturn engine to be 325-340 HP? I know that my CV axles in the Saturns are rated up to 375 HP so that part, I should be ok, but I'm going to do .20 over, 3rd generation 6 counterweight crank and lower tie plate, ARP main and head studs, a stage one port and polished head with polished combustion chambers , port and polished intake manifold with port matching , bigger throttle body, dual intake cams, mild de shrouding of the intake valves, mildest bowl blending offered, and adding narrow blended 1-2 mm valve seats and shim the valve springs to .15'' with 14 PSI of Boost, and I haven't decided yet if i'm going to run it on E85 , unless you can tell me how to safeguard my fuel supply parts to run it safely, thanks, if u can let me know, always enjoy watching your great work and great channel.. ;)

[@richardholdener1727]

THAT WOULD BE A BIG TURBO!

[@junechris]

@@richardholdener1727 For the joking billion HP? or the 14 PSI?...lol

[@Big2009Gee]

Compression ratio!

[@jordanh1313]

What would you gap your rings to on a 5.3 ????

[@richardholdener1727]

we normally do .028-.030 for high or sustained boost

[@jordanh1313]

Richard Holdener .030 top or the bottom ring or both match the same gap on top and bottom

[@richardholdener1727]

Jordan h both the same-it’s not critical

[@jordanh1313]

Richard Holdener thanks!!!!!

[@littleherms3285]

Most engine builders go .002" bigger on the second ring to relieve pressure between the rings. Helps with ring flutter on the top ring.