HOW TO PICK THE RIGHT TURBO. BIG TURBO VS SMALL TURBO-WHAT WORKS BEST?

[@richshim4621]

I legit don't understand how this channel is not bigger. The content is gold, the commentary is up beat, and the intro music gets my bobbing lol! I get so excited about seeing these on my news feed.

[@richardholdener1727]

go tell like 1M close friends

[@MRBoatwrights]

This is not a negative comment but this type of channel is appealing to nerdy type gear heads like myself. There is a limited number of us out there. The big time automotive channels are produced like a reality tv show which does not appeal to me I am here for the information.

[@evanc6110]

@@MRBoatwrights I agree. I think a lot of people end up watching the TV stuff.

[@jared96ek9]

@@MRBoatwrights there is not as many intelligent viewers as there are ones who like the other crap

[@deegan727]

@@MRBoatwrights Agreed, too many people just want fast 60ft and ETs, burnouts and other shenanigans and don’t care how the HP was made. If more people watched Richards content they would know how to optimize their setup and/or learn why their setups aren’t doing what they expected.

[@oneounceslugAPEX]

Channel obviously deserves to be bigger. I think the problem is that he proves all these little rice burners or want to be enthusiasts to be wrong. For example there's no such thing as a boost cam or turbo cam. And God forbid he says a bigger turbo isn't better

[@macdonmar]

20 years ago I used to love messing on a old Australian website that had an interactive compressor map trying to find that perfect setup

[@wannabeetiger]

I wish that u had a software link for that, it sounds pretty cool.

[@deanstevenson6527]

Halls Turbo. It was great. METADATA took it out. There was a Weber and DellOrto Independent Runner carb selection and jetting website too.

[@elijahguzik4618]

@@wannabeetiger borgwarners matchbot does this but better

[@Saddedude]

Richard talking so much sense as per normal. I have a street car 5.3 ls. Its a daily and i catch a ton of flack for my tyrbo choice from the ls community. Its a single s366. And it lights like a candle and makes an easy 5-600whp. Thats all im looking for in this car so why would i size a larger turbo? Im making positive pressure by 2500rpm and am walking away from all kinds of street cars before the even realise it. 800, 900, 1000hp is fun. Dont get me wrong. But a torquey street car with good turbo response is a blast too drive around in.

[@richardholdener1727]

that is a good turbo

[@999Lucas]

Easy thing I was taught: 2 high 1 low value of: Compression Amount, Turbo Size, and Engine size. Another thing to note about turbo sizing is that, big turbos can help with fuel economy by keeping an engine off boost at cruising RPMs, and help to control EGTs and engine tempratures. With the awesome housings and wheels these days, and even VGT or twin scroll setups, its great how tailored the geometry can be for your flows and pressure ratios.

[@observingrogue7652]

Thank you. This was great to see. I was worried that I would always have oversized turbo problems, because I am interested in turbocharging small single and parallel twin motorcycle engines, that are around 200cc. If the smallest turbo I can find is still useless at half or even 2/3rds rpm, then I accept that, for either low rpm economy, or, I will just use electric motors to handle low rpms and launching out of a corner or dig, and have the turbo handle sustained high RPM power, that EVs struggle with. Parallel or Series Hybrid, I'll accept this.

[@jonj4357]

I run a 46mm Garrett gen 2 on a 2.4l with no variable timing cam and a 6500 rpm redline. Def on the small side but spools damn near instantly. Stock cams and my powerband falls off after 6k pretty drastically. But it’s a primarily street car and still very fun, not often I take it past 6 unless I’m racing

[@deanbryan3034]

Good video Richard, I think we all.love boost, nearly as much as you do! It always makes me think that if you mirrored a Honda dyno graph it would look like a standard v8 graph lol

[@kellyheath8547]

seems like street turbos have tight exhaust housings and full race setups will usually have bigger hot sides for more flow.

[@802Garage]

Velocity and flow pretty much everything in an air pump. :D

[@Bill-flatplanefool]

Re: long tube header. What I’ve noticed is that longer headers allow the charge to cool off more and give the effect of a larger turbine. By that I mean reduced back pressure and a less responsive turbo.

[@linoleumshake]

I had a 2.4 turbo and people told me it was too small. I was on wastegate by 3k and had torque instantly. I didn’t want to wait to 5500-6k for power

[@hayden6056]

3 isn't tooooooo bad I had an rb25 with a td06, vct still and 4.3 gears. I had 23 psi by 2500. Being able to open the gate at 60kms an hour in fourth gear got old really quickly.

[@jonj4357]

I have a ka24de on a gtx2860 which is way small for that displacement. Needless to say, it’s always in the powerband but falls off past 6k due to stock cams. Street car with Instant spool tho

[@vr6swp]

I'd like to try the 7875 on my car (3.2L 24V VR6). Seems like the K24 doesn't quite move enough air to spool it.

[@ferrnanimal]

I really love this channel but I wish I could actually see video of the engines running. Everything else is great but a short clip of the engine making power would be amazing

[@richardholdener1727]

watch the latest (or many other) videos-plenty of running clips

[@Adrianzx]

Richard you know what I like

[@nolanmcevoy2547]

Can you do this on the Ameri-barra. I’ve always wondered what that motor could do with a smaller turbo oriented for lighter duty truck applications. Why should Dodge be the only one to get turbo inline 6 truck power

[@rogermarshall8991]

Turbo lag ??? Has anyone else heard of the Blaylock switchblade turbo. ??? For Diesel applications it's awesome.

[@GIGABACHI]

Variable Geometry Turbos (SwitchBlade it's a variation of the genre) are the answer to any application that needs to keep at bay lag.

[@mgfofoklahoma4018]

Okay....A commercial application on a Kubota V1505T engine with a TD025M turbo. Will a TD025 Turbo offer any benefits? The TD025 is slightly larger and used on that engine for Bobcat applications

[@greywuuf]

So close .......run this same sequence on the 4.8 LS

[@tjberry5899]

Wish I could’ve given more than one thumbs up!

[@arcdestriumph586]

I usually pick based on sound .. A whistle that goes Schwweeeeeeeeee when it comes up on full boost.

[@Hohmies86]

So if I wanna be a bandit in my eg whippin in and around traffic on the road or rippin up deer lease roads, I want a smaller diameter turbo.... Subbed

[@jackthayer904]

Love this video it would be interesting to see this on the other extent with pushing a small turbo past it’s efficiency range

[@fastredcar97]

The good thing about running e85 is that you could push an engine very hard in the lower rpms and have the psi drop out later in the curve.

[@Zach4046792]

Idk if youve made a video on this before could you do a video explaining and testing turbo A/R and the responsiveness or lag there of say between like a 0.84 and 1.25 or similar

[@BrodeyDoverosx]

Great video and it’s applicable to my four cylinder engine. Thanks!

[@Adrianzx]

Every said my 57mm efr was too small for a 7m but it flowed double of the stock turbo and didn't spool much different

[@802Garage]

EFR is also one of the most if not the most advanced aftermarket turbo available right now. Will out flow turbos with older tech twice its size. Leagues ahead of The Garrett GT and GTX series and still better than the G series. Watch TurboDirect S.A if you want to learn all about it.

[@salvatorehayes2753]

@@802Garage I'm Gonna Look Into Those EFRs 👍

[@aftastosk6016]

Richard, this test is between the biggest possible for street application and a ridiculous sized turbo for both engines. In a much more credible comparison would had been between a T3/T04E for the K24 and a some kind of GT28xx (a 2867?) for the B16. Also, since it's a turbo test, you should give more details like turbine housing a/r size etc.

[@richardholdener1727]

the test showed exactly what was intended-the change in response rate-the turbo sizing (or lack thereof) was covered in the video

[@aftastosk6016]

@@richardholdener1727 all i am trying to say is that nobody will install a 57mm turbocharger in a B16.

[@hillsidesavage1413]

I feel a small turbo would be good for a nice sbc 350 setup what u think ? I’m just looking for that 600 hp market

[@theozman38]

Our lord Turbo Christ has spoken

[@GIGABACHI]

👌🙂👍

[@phillipchastain2295]

This makes me think about extreme upsized turbos on compound boost, since responsiveness increases and a mechanical can still cut them at top it would seem easy not to go over.... I don't really know anything just thinking

[@phillipchastain2295]

Given the blower could become a restrictor at some point

[@seran2316]

Hey Richard!, wanted to ask on the t3/t04 B16 Dynograph, what octane race gas was used?

[@richardholdener1727]

114

[@jstdrv]

Love the content Richard, but i think it's time the intro music got a rebuild! My neighbors hate me now

[@davidperry4013]

If I get an Infiniti M37X, I would go with 2 Garrett GBC22-350 turbos for instant boost and up to 700 hp.

[@mikezakel3490]

Have you done a video ahowcasing the affects of to small of a turbo and what the data results show like restriction boost and gead ect? Also what about having way to big of a turbo. This video shows boost lag pretty good but can you have to big of a turbo and make almost no boost?

[@richardholdener1727]

yes-take a look at the video where I ran a GT45 turbo on a 454 BBC-very high back pressure. As to running too big of a turbo, if you keep increasing the size, you get more and more lag until the motor can't spool the turbo

[@mikezakel3490]

@@richardholdener1727 what's the name of the video

[@tomhall3940]

What size turbo did the early buick V6 engines use? Looks kind of small to me. I have a 87 or so Regal set Up.

[@davidsabyan2481]

One consideration for oversizing a turbo is too minimize bent stock rods and or broken pistons. This might be a consideration between two turbos that are close in size.

[@psiwog]

Why do you say that can increase rod breakages? You can tune out cylinder pressure through peak torque

[@young11984]

Well im glad i went with the 66/62 for my 2.5 Duratec now, which one did you use on your Zetec focus?

[@richardholdener1727]

we used a 67mm on the 512-hp version, the Fmax kit was a small T3

[@keiracurro8407]

Dads 4.0 falcon went really good was responsive, then they went bigger size bigger wheels, don't feel exciting anymore, it would need ultra low gears to get that power down & more revvs, whenever they suggest mines too small i resist they all say it.

[@AmericanThunder]

On a little engine like that, why not just run compound twins?

[@MrBlackbutang]

The difference is 4 cylinder and vs v8 displacement is the problem

[@andrewchristmas2026]

What was the difference in the turbine housing size. Also were theses single scroll or dual scroll?

[@TheMoody876]

I have 2 gen 1 vs racing 7875's on my sbc

[@michaelgarrow3239]

Have a cj-5 with a 232 -6. Want to pull stumps. Lol. What would be a good turbo. I I’m kinda new to pressure. But .030” over pistons, small cam, and Offenhauser and 450 CFI 4b. 3 speed manual.

[@monikhushalpuri]

Holset hx30 would suit you, do some research and look at dyno graphs on the internet to figure out which hotside is best for your displacement and needs...smaller hotside means more low end torque and less top end power.... also go to this UK website called stavtech and look for his holset articles...he lists correct exhaust housing cm To AR conversion reference which is key for you to figure out what's needed to pull stumps a little faster or pull on other cars

[@richardholdener1727]

the cheap gt3582 or even smaller gt3076

[@michaelgarrow3239]

Thank you! Would a junk yard Honda turbo be in the ball park? Also, would the Chineseieum turbo last? I know they do well in a Dino but would they last? Do they have bearings or bushings for the turbine shaft?

[@austinmaxi]

Has there been anything said on different turbine housing A/R sizes on the same turbo? and how that affects spool and peak power and stuff?

[@richardholdener1727]

tighter changes spool

[@chipcurrey653]

Is there any proof a next gen 7875 will make 1000 crank?

[@bobbondarul7448]

Nice What turbocharger specifications you recommend for an 1.6 tdi engine to obtain over 220bhp ? Thank you

[@michaelgunning347]

This is just for the pig iron of it or u may point out something I missed , so I seen bk to bk if garret and persission turbos there was a Hugh difference in the , but this was years bk , and I know u did these tests with stuff lying around but maybe keeping the brand but a bigger as the k24 the bigger turbo should not make similar Bhp at the same boost it should be less psi but yet it is so us this showing up the point of the cheap turbo

[@gothicpagan.666]

Interestingly on the last graph the No,s at the start of the run were the same before they diverged. Is that a result of the way the dyno was loaded and then the transient rate of acceleration during the run?

[@richardholdener1727]

response rate is always the same-just higher boost allows more power

[@gothicpagan.666]

@@richardholdener1727 Some thing i missed, Steep old learning curve, I'll watch it again. Many thanks

[@Haya3usaGsxr]

Hello, could you do dyno also for check gains or loss when using different size of intake piping please on diesel ?per exemple 63mm , 76mm,90mm ...

[@richardholdener1727]

I don't do diesel

[@Haya3usaGsxr]

@@richardholdener1727 then on petrol please?

[@minineji7050]

Out of curiosity, have you had experience with s252 or s257 borg turbos on these k24 motors? I am about to place an order for one of them, but am really curious if the 5mm differences will be extremely noticeable for a street build. I've never had a turbo car before so I'm just curious about what your experience is with these sorts of motors

[@richardholdener1727]

I have not run those turbos before

[@minineji7050]

@@richardholdener1727 shucks lol, well thanks anyway and excellent vid! I learn a heck of a lot from your content 🤝

[@ArifKhan-xy3cn]

Hey man, what size of turbo do you recommend for a 1500 cc engine. Street car, daily driving?

[@richardholdener1727]

what power level?

[@johnhalbasch1519]

Is it possible to run a turbo on a 390FE w/ trick flow heads at approx. 10.8:1 compression on pump gas. If so, what turbo would give that responsive low end power.

[@richardholdener1727]

yes-a GT45 would work

[@robv.o.1777]

Do a sequential turbo setup, Little turbo out of the hole, big turbo to take it to "Beam me up Scotty"!😁👍

[@richardholdener1727]

complicated plumbing

[@justsying]

What about a vgt

[@utahcountypicazospage5412]

V8 guys can have backpressure issues.make sure not to go to small it’s not worth the problems. be patient LOL or get a small camshaft to help down low you’ll thank me later

[@MrAndrius12]

What is the name of the intro song?

[@AllmotorTurbo]

Bigger turbo bigger rpm hp peak power? Or same peak power rpm? Sorry my english

[@richardholdener1727]

bigger turbo can change where the motor starts to make boost-other wise it doesn't change where it makes peak power unless you have a rising boost curve

[@AllmotorTurbo]

@@richardholdener1727 what turbo has rising curve? I have t3t4 same peak rpm in n/a set up

[@salvatorehayes2753]

Lol Me With A GTX3582R With .82AR Housing On My 5.7 Hemi hahaha It's Pretty Similar To The 500hp Precision 62.

[@expertmotorcycle9648]

Why don't you measure back pressure? And when are you going to test the new Electric Garrett E-Turbo? Even bigger Turbo with no Lag!

[@richardholdener1727]

we usually do measure back pressure

[@jhaymgaming4476]

Sir so bigger turbo is more hp per psi than smaller turbo?

[@richardholdener1727]

MAYBE

[@jhaymgaming4476]

@@richardholdener1727 why maybe sir example all stock internals 1.8 engine, boosted by medium and big turbo

[@bretteinhorn2629]

B vs k vs h series. Where does h series rank?

[@richardholdener1727]

its bigger-so it works well

[@bluepen215]

God bless sir

[@Projekt5.3]

I lik ze funky dance muzic intro yaaaah

[@markbulva4188]

I luv this content. The hour long let’s talk about it content not so much

[@genemounce8302]

sup buuuuuuuuuuuuuddy?! Long time no typey lol

[@TheProchargedmopar]

Billet 78/75 should be just about perfect for my 400 BB mopar. Responsive TQ and decent HP for a DAILY DRIVER. Everybody wants a BIG block AND a TURBO!!! 😝

[@TheMoody876]

I have a 400 small block chevy with 2 billet 78/75 turbos

[@deanstevenson6527]

Or put nitrous from 4000 to 5500 on a big turbo to make it spoooooooolllllll. 75 units of torque can be easily spiked by a bottle of giggle Gas....

[@unclesquirrel6951]

Personally I blame squirrels

[@bobbywalter5320]

Damn.

[@gavwilldo]

I thought you’re meant to put the biggest turbo you think the engine might spool, then add nitrous when it doesn’t 🤷‍♂️

[@richardholdener1727]

yes

[@bluepen215]

Good a

[@GurjB]

Vroom vroom

[@KreatorOfDeath1985]

First wooo

[@michaelblacktree]

I had to give a thumbs-up for that username. LOL

[@jdcarguy1242]

56mm on b16 is a street turd.

[@jonj4357]

Needs 46mm or smaller or actual fun lol

[@daverr8163]

Having that turbo so far away ,no wonder you had lag. turbos run on heat.

[@sohctony]

🤢🤮 "thanks" for this incredibly vague comment about data from a 15+ year old dyno only oriented build.

[@Hunteratloppshop]

This video took way too long to come about

[@brianlafollette7530]

So many variables So little time.