The 9cm2 he351 turbine housing is magical. With upgraded turbine sizes like the 67mm it can make well into the 800hp range. Great info. The magic’s is all in the turbine and nobody knows it :) you need way less compressor than the internet will tell you.
Loving these videos regarding the holset. I'm running one on a Pinto (2.0 8v) with a fully forged engine and have a 12cm housing, it's just a standard turbo not a fancy billet wheel. I want to make 400hp+ currently makes just over 300hp at 17psi and comes in at 3500rpm and holds all the way out to 7200. Would I benefit from changing to 8cm housing or going for one of these new ones with the billet wheels?
Spool arounds about right for a 2ltr, power is pretty low but if the N/A engine is making 140-150bhp then a touch over 300 at 17psi sounds on the money. I mean that’s low boost, a Cossie at similar boost makes similar power. This spec would spool faster though of course as it’s a smaller housing. Your power isn’t likely down to anything but the fact the boost is low on an engine that doesn’t make a whole lot of power without the boost.
Hi Mr Stavtech. Thanks for sharing your wealth of knowledge with us all. I recently acquired one of these holsets or very similar in size and specs. One difference I have noticed is that mine has a conical ring that looks to be held in place with a circlip that's covering what I think are the anti surge ports. From what I've seen on some your vids, this ring isn't there or you've removed this part. Are you able to give any info on this and whether or not I should remove it and any pros/cons of doing so? Thanks.
Thanks for sharing your knowledge Steve. I was wondering if HE351 with 12cm housing would be a perfect fit to my Buick 3800 series II V6 engine. I want to have about 350-400ish very streetable horse power. It's still plenty for stock Borg Warner T5 transmission and factory 10 bolt 7.5" Chevy rear end. I'm also curious about HE221 with 6cm housing in BMW m52b20 if it will have similar performance to Borg Warner B3G a45 AMG Turbo. Cheapest alternative to turbocharged this tinny 6 banger would be TD04-19 or Chinese gtx28. Target is about 250-300HP
Hi @Stavtech, I'm thinking to use a HX35 with twin scroll 10cm housing on a VX220, keeping it low boost with dual 38mm wastegates for max 250hp. Later changing the engine to a built B207 and aiming for 400hp. Would that make sense or would you use a smaller turbo for the Z22se engine? Would like to keep it as responsive as possible. Thanks in advance!
I’m using a HX40 with a 16cm housing on a little 1.8 with a twin scroll setup and on the dyno the graph showed 0.5bar boost by 3000rpm, 1bar by 3500rpm, 1.5bar by 4200rpm, 2bar by 4500rpm and held that to the 8000rpm limiter. On a bigger engine and smaller turbo like you’re talking about you’d be way faster spooling if done right.
You reckon a he351 with an 8cm housing would be too small for an rb25neo? would be a twin scroll setup and i know people usually recommend a 12cm housing but just curious of other opinions
Planning on one of these on a forged 3sgte, hks cams and twin scroll manifold. Do you reckon spool at around 3-3500 would be achievable? Plan on running anti-lag too to make it as drivable as possible. Just worried it might be a bit big
Easily. Even with a bigger 12cm housing these are proven seeing 25psi by 3500rpm on 2ltr 4G63s. I’m seeing 30psi by 4500 on a much smaller 1.8 using a much bigger HX40 16cm
Hey man, stumbled across your channel while looking for info on the Garrett g series. Thank you. I wish this video came out in November when I ordered my Garrett g30-770😅. It’s for the new Subaru 2.4l DIT cars and I went with a massive 1.01 AR for this mid size turbo 😅. Wish I went with .83 in hindsight. If I may ask, What are your thoughts on .83 vs 1.01 for the bigger g35-1050? That is my end goal turbo for 750-800hp. Thanks!!
Depends what spec HE300 8cm, as this turbo here, the HE351 8cm is also sold/classed as a HE300. For single scroll and keeping T2 flange the 7cm HY35 is a decent option, but this 8cm HE351W would probably spool the same if using a twin scroll manifold
Been toying with the idea of chucking one of these on an M57 with a cast twin scroll manifold, probably a 35d for the fancy fueling. Any idea how that would spool as there's very limited M57 info on HX/Y/E35's on them
@@allanbeckett1537hi mate, for those goals I’d use this 351 and a twin scroll manifold. On mine I use the bigger HX40 16cm and a twin scroll cast SPA manifold making 514 but way more to go if turned up more. For 450 or so a 351 with either the 8cm or 12cm on that same or similar manifold would be perfect imo
Hi. What turbine housing do you recommend for a bmw m52tub28 with hx40 super? (Compressor 60 / 86mm, Turbine 75/65 mm) The power goal is 500whp (with pump gas ron98 and low cr), I'm thinking of getting the 16cm but afraid of late spool.
I’m the bolox who keeps reminding people Ken block was the greatest driver ever of my woman’s page 😅 tell me this. What holset would you use on sr20? Have a Gtir i toying with upgrading. Cosworth hg and studded with 660 injectors and question 2. What would you run a bmw m50b28 with forged pistons? Decent top mount with 1000cc injectors. Ken block for life ❤️
Hahaha superb! I wondered who it was! 😂 1- Depends on your goals, if you had a twin scroll manifold one of these 8cm HE351s would be good. 2- Again depends on your goals as 1000cc means you could have all kinds of power. A HE351 12cm would spool up from cock all and still proven at 500+ on M50s, though I think if I had a built engine and big injectors I’d put a HX52 on it and send it
Technically, big wheel small housing is the most efficient way, and usually how works race turbos are. But the actual difference in efficiency I don’t know. It’s a trade-off to some extent regardless as technically a bigger wheel means more mass to rotate, but it’s a better way to do it if possible. Generally though manufacturers have it mostly right with wheel sizing and just gotta choose your housing to suit your goals though.
@@StavTech So basically it's just a trade off of leverage vs mass? Can you also explain how to read turbine maps? I use a rule of thumb of about 20-25hp per lb of turbine flow on a Garrett map but it's not based on any science.
The K04 on the Volvo is so teeny tiny. Makes 20psi by 2300rpm but by 6000rpm it’s back down to 15psi as the engine wants more air and the turbo can’t flow it. Peak power 5500rpm lol. Wish you could decently twin scroll a 5 cylinder. Oh well.
Tbf I’m not convinced you can’t. Not perfect but I’d wager it’s got a good effect. But yeah, same turbo but only running say 10psi and peak rpm will be higher, though power lower
Depends on your boost, and what engine. Torque kills rods. This VR6 is low boost so not big torque, and they have mega strong rods anyhow. If you pushing a stock engine, yes bigger the better, but if you not near its limit, not a big issue
not really as it would give a false impression of housing size on things with more area before the wheel etc. It's the area around the wheel, the main scroll section, that counts@@Gamesplaytoday
The 9cm2 he351 turbine housing is magical. With upgraded turbine sizes like the 67mm it can make well into the 800hp range. Great info. The magic’s is all in the turbine and nobody knows it :) you need way less compressor than the internet will tell you.
Yep. Most obsess over the comp wheel and forget the turbine side.
Tech videos FTW. Interesting and well explained
I like these turbo tech videos. 👍
Loving these videos regarding the holset. I'm running one on a Pinto (2.0 8v) with a fully forged engine and have a 12cm housing, it's just a standard turbo not a fancy billet wheel. I want to make 400hp+ currently makes just over 300hp at 17psi and comes in at 3500rpm and holds all the way out to 7200. Would I benefit from changing to 8cm housing or going for one of these new ones with the billet wheels?
Spool arounds about right for a 2ltr, power is pretty low but if the N/A engine is making 140-150bhp then a touch over 300 at 17psi sounds on the money. I mean that’s low boost, a Cossie at similar boost makes similar power.
This spec would spool faster though of course as it’s a smaller housing. Your power isn’t likely down to anything but the fact the boost is low on an engine that doesn’t make a whole lot of power without the boost.
Hi Mr Stavtech. Thanks for sharing your wealth of knowledge with us all.
I recently acquired one of these holsets or very similar in size and specs. One difference I have noticed is that mine has a conical ring that looks to be held in place with a circlip that's covering what I think are the anti surge ports. From what I've seen on some your vids, this ring isn't there or you've removed this part. Are you able to give any info on this and whether or not I should remove it and any pros/cons of doing so? Thanks.
Silencer ring. Used to reduce turbo spool noise. Can remove if want
Stav I’m building a Toyota iQ 1.33 4 cylinder what size turbo for 200 plus please
This is only a bit of fun I want to beat the turbo micra and turbo Toyota aygo cheers
Thanks for sharing your knowledge Steve.
I was wondering if HE351 with 12cm housing would be a perfect fit to my Buick 3800 series II V6 engine. I want to have about 350-400ish very streetable horse power. It's still plenty for stock Borg Warner T5 transmission and factory 10 bolt 7.5" Chevy rear end.
I'm also curious about HE221 with 6cm housing in BMW m52b20 if it will have similar performance to Borg Warner B3G a45 AMG Turbo. Cheapest alternative to turbocharged this tinny 6 banger would be TD04-19 or Chinese gtx28.
Target is about 250-300HP
Hi mate, for 350-400 this 351 with a 12cm sounds ideal on a 3.8. The 221W idea on the 2ltr doesn’t seem a bad plan either!
Hi @Stavtech,
I'm thinking to use a HX35 with twin scroll 10cm housing on a VX220, keeping it low boost with dual 38mm wastegates for max 250hp. Later changing the engine to a built B207 and aiming for 400hp. Would that make sense or would you use a smaller turbo for the Z22se engine? Would like to keep it as responsive as possible.
Thanks in advance!
I’m using a HX40 with a 16cm housing on a little 1.8 with a twin scroll setup and on the dyno the graph showed 0.5bar boost by 3000rpm, 1bar by 3500rpm, 1.5bar by 4200rpm, 2bar by 4500rpm and held that to the 8000rpm limiter. On a bigger engine and smaller turbo like you’re talking about you’d be way faster spooling if done right.
You reckon a he351 with an 8cm housing would be too small for an rb25neo? would be a twin scroll setup and i know people usually recommend a 12cm housing but just curious of other opinions
Depending on goals, that would be fine imo. It’s still a big high flow turbine wheel regardless
Planning on one of these on a forged 3sgte, hks cams and twin scroll manifold. Do you reckon spool at around 3-3500 would be achievable?
Plan on running anti-lag too to make it as drivable as possible.
Just worried it might be a bit big
Easily. Even with a bigger 12cm housing these are proven seeing 25psi by 3500rpm on 2ltr 4G63s.
I’m seeing 30psi by 4500 on a much smaller 1.8 using a much bigger HX40 16cm
Hey man, stumbled across your channel while looking for info on the Garrett g series. Thank you.
I wish this video came out in November when I ordered my Garrett g30-770😅. It’s for the new Subaru 2.4l DIT cars and I went with a massive 1.01 AR for this mid size turbo 😅. Wish I went with .83 in hindsight.
If I may ask, What are your thoughts on .83 vs 1.01 for the bigger g35-1050? That is my end goal turbo for 750-800hp. Thanks!!
I have Hx27w 8.5cm T2. Max 270-280 on my diesel application.
Would a HY35 7cm T2 be a decent upgrade? Or a HE300 8cm twinscroll?
Depends what spec HE300 8cm, as this turbo here, the HE351 8cm is also sold/classed as a HE300.
For single scroll and keeping T2 flange the 7cm HY35 is a decent option, but this 8cm HE351W would probably spool the same if using a twin scroll manifold
Been toying with the idea of chucking one of these on an M57 with a cast twin scroll manifold, probably a 35d for the fancy fueling. Any idea how that would spool as there's very limited M57 info on HX/Y/E35's on them
Would spool out of nothing for sure. 3ltr and twin scroll, will be pulling hard from about 2k is my guess
Hi Mr @StavTech
Thanks for the video very interesting. What holset turbo would you recommend for a 1.8t for fast road use?
What’s the power goals?
@StavTech it will be fully forged but look for about 450bhp
@@allanbeckett1537hi mate, for those goals I’d use this 351 and a twin scroll manifold. On mine I use the bigger HX40 16cm and a twin scroll cast SPA manifold making 514 but way more to go if turned up more. For 450 or so a 351 with either the 8cm or 12cm on that same or similar manifold would be perfect imo
Hi. What turbine housing do you recommend for a bmw m52tub28 with hx40 super? (Compressor 60 / 86mm, Turbine 75/65 mm)
The power goal is 500whp (with pump gas ron98 and low cr), I'm thinking of getting the 16cm but afraid of late spool.
16cm seems a good idea to me. I’m running a 16cm on my HX40 on my 1.8T and spool is fine
@@StavTech all right, thank you
Holset HX40 super familiar to you? #16 twinscroll manifold. Im putting it on B230 with 16V head.
I’m running a HX40 16cm with a twin scroll manifold on my 1.8T
I’m the bolox who keeps reminding people Ken block was the greatest driver ever of my woman’s page 😅 tell me this. What holset would you use on sr20? Have a Gtir i toying with upgrading. Cosworth hg and studded with 660 injectors and question 2. What would you run a bmw m50b28 with forged
pistons? Decent top mount with 1000cc injectors. Ken block for life ❤️
Hahaha superb! I wondered who it was! 😂 1- Depends on your goals, if you had a twin scroll manifold one of these 8cm HE351s would be good. 2- Again depends on your goals as 1000cc means you could have all kinds of power. A HE351 12cm would spool up from cock all and still proven at 500+ on M50s, though I think if I had a built engine and big injectors I’d put a HX52 on it and send it
So is it better to go big wheel small housing or the other way around? Is there any difference?
Technically, big wheel small housing is the most efficient way, and usually how works race turbos are. But the actual difference in efficiency I don’t know.
It’s a trade-off to some extent regardless as technically a bigger wheel means more mass to rotate, but it’s a better way to do it if possible.
Generally though manufacturers have it mostly right with wheel sizing and just gotta choose your housing to suit your goals though.
@@StavTech So basically it's just a trade off of leverage vs mass? Can you also explain how to read turbine maps? I use a rule of thumb of about 20-25hp per lb of turbine flow on a Garrett map but it's not based on any science.
For a audi/vw 1.8t what holset would be close to a gt3071r spec from factory? Looking for 380+hp around 3k spool or so.
This turbo is part way between a GT30 and GT35. Personally I’d run this with a twin scroll manifold.
The K04 on the Volvo is so teeny tiny. Makes 20psi by 2300rpm but by 6000rpm it’s back down to 15psi as the engine wants more air and the turbo can’t flow it. Peak power 5500rpm lol.
Wish you could decently twin scroll a 5 cylinder. Oh well.
quick spool valve :p
Tbf I’m not convinced you can’t. Not perfect but I’d wager it’s got a good effect.
But yeah, same turbo but only running say 10psi and peak rpm will be higher, though power lower
It’s actually better for a stock internal engine to have a larger rear housing. Keeps the rods in
Depends on your boost, and what engine. Torque kills rods. This VR6 is low boost so not big torque, and they have mega strong rods anyhow.
If you pushing a stock engine, yes bigger the better, but if you not near its limit, not a big issue
im suprised they havnt started included the volume of the housing in the measurements
Literally not a single turbo company on the planet has ever done that, as it doesn’t mean much
@@StavTech would it not be a more universal metric across flange sizes
not really as it would give a false impression of housing size on things with more area before the wheel etc. It's the area around the wheel, the main scroll section, that counts@@Gamesplaytoday