Holset Turbos, PART 8

[nightracer91]

Quick question, does the .55 BEP housing work for both the hx35 and hx40?

 

[Strm Trpr]

Quick question, does the .55 BEP housing work for both the hx35 and hx40?

Negative.
The hx35 has a smaller turbine wheel than the hx40, therefore the turbine housings are not interchangeable.

 

[nightracer91]

Thats what I thought. Thanx!

 

[dsm-onster]

The .55 housing CASTING works for both. But when one orders the housiing for an hx35, then it is cut for the hx35 turbine wheel. Yes, you can have the hx35 .55 a/r housing recut for the larger hx40 wheel. but, the other way around, no you can't make the cut smaller to go back to an hx35 turbine wheel.

 

[turbotalon1g]

Mr. Peepers just posted his results in the results thread, and I'm not sure if i'm allowed to comment in there, but that spool is awesome, way better than my .55ar hx35 ( i know lot of factors), but that is actually comparable to a 16G i think.

I am surprised however in how much it drops off up top. I would of thought it would of stayed up a lot longer than it did.

 

[JusMX141]

I am surprised however in how much it drops off up top. I would of thought it would of stayed up a lot longer than it did.

Must not be too extreme if he's trapping nearly 130mph on his shakedown passes.

 

[Morphius]

Mr. Peepers just posted his results in the results thread, and I'm not sure if i'm allowed to comment in there, but that spool is awesome, way better than my .55ar hx35 ( i know lot of factors), but that is actually comparable to a 16G i think.

Please remove your post. We're trying to keep comments out of that thread.

Thanks.

 

[Strm Trpr]

I'm sure more peak power has been made on the stock 1g intake manifold, but probably not much, if at all past 6500rpm.
SMIM will stretch that powerband over to the right a little?
272 intake cam will help as well.

True twin scroll set-ups will benefit much more from altering cam timing with adjustable cam gears on the dyno.

Dyno Time = money!

Great job on the whole set-up!

O2 Eliminator DP looks great!

 

[Morphius]

I'm sure more peak power has been made on the stock 1g intake manifold, but probably not much, if at all past 6500rpm.
SMIM will stretch that powerband over to the right a little?
272 intake cam will help as well.

True twin scroll set-ups will benefit much more from altering cam timing with adjustable cam gears on the dyno.

Dyno Time = money!

Great job on the whole set-up!

O2 Eliminator DP looks great!

Thank you for moving your post.

 

[nightracer91]

So I'm thinking about running the BEP .55 housing on this HX-35 that I have. Keith from Pure Tuning, a good friend of mine, suggested this set-up with an FP Race Manifold for some of the most ultimate spool from a larger framed turbo. He said I would probably max out around 450awhp on race gas on his Mustang Dyno. Any objections to these statements? My goal is high 10s on a ~2900lb car with DOT slicks. You can see my current build in my profile. Just debating if I should attempt the Twin-Scroll set-up or the bolt-on housing.

 

[Mr Peepers]

I think there is a good amount left in the stock 1g intake and probably the cams as well if they were degree'd but who knows.

Either way the current build progress is a 2g head, 2g pistons(1g rods), and an evo3 intake manifold. After I get the new engine broken in early spring(hopefully) it will be getting the 272 intake cam. Goal is a wide and early powerband/area under the curve.

The engine will be in a 1g auto awd shell I picked up and all the holset bits will be transferred over to it and see how the stock stall works out.

The current 5 speed car will go back to last years 14b/safc/sidemount setup with the current stock 6 bolt and see if I can beat 12.004

 

[turbotalon1g]

Jusmx - I know what he did, but it doesn't ignore the fact that shit fell hard like a 16G, which I am surprised at.

Morph - I deleted my post, sorry for the inconvenience.

nightracer, I'd go TS, the .55 HX35 left me wanting a lot more up top and if you want a drag car that is probably where you want the power.

Mr P. - I agree with you, but we know that a 272 would be worth more than the 264 anyway. I can't wait to see how it does on a stock stall. I'm itching to come back to the holset world.

 

[dsm-onster]

My stock cams with a 60-1 with a t31 turbine wheel and a bep housing fell flat on it's face at 6K, that's with a technically larger turbo than Matt's true divided 12cm^2 hx35. My 18cm^2 turbine housing with my h1c does very well up top. Spool is SLIGHTLY later than in bolton form, with the same setup otherwise (fp2x, 1g intake, 2.0, 8.3 wiseco/eagle). He would REALLY like a 16cm^2 housing. The 264 cam is really shaping that powerband too short. Especially with the stock 1g intake manifold. With a set of full 272s or fp2s or other similar duration, you see airflow still gaining after 6500rps, with a SMIM making more of a difference. Yes, 'there are alot factors', but the real factor is the 264 cam. But, it sets his general power band exactly where he wants it. Playing with exhaust cam timing would give him more up top.

I really believe that a true divided setup likes a more even coupling in total cam duration. It's all speculation. But this is because the entire setup "feels" much more n/a-like. And all the tuning I did really seams to mymic what you'd expect to do with an n/a setup.

 

[viperlp01]

Well guys. I am in the process of building a t4 twin scroll forward facing manifold for my new project. I am cutting from the strut towers forward off the car so I will have all the room in the world. No power steering and alt relocation. I am going to put the turbo somewhere behind to drivers side head light with the discharge shooting down so it will hit my FMIC perfectly. My twin scroll merge collector is being built right now and I will be building the rest of the manifold. All stainless 304 sch 10 tubing is being used with all stainless flanges. I will be using a hx40 60mm 7 blade with the 17cm^2 t4 divided housing. The car has a fuel cell and twin walbro 255s in parallel (e85). It will have my 9:1 CR stroker engine in it with a change in cam choice. Panda 2gb talon FTW ..

 

[turbotalon1g]

Matt, thanks for your statement/post.

I was wondering about his turbine housing size, I know there are multiple sizes. If he is using the 12 cm and my memory serves right that is actually quite small for a divided housing and I agree a 16cm or even 18cm would be very helpful to that top end.

Man i wish my car was running.

 

[nightracer91]

So with what I want to do, it sounds like the finger is pointing towards twin-scroll?

 

[untouchablecc]

I have been kind of hunting down a 12cm housing for my set up. From what i have been told the 18cm is not really great for our cars. Laggy but does flow a lot. I have two of those housings but i didnt think it would be ideal for my set up.

 

[Mr Peepers]

I would go with a larger turbine housing in a heartbeat. I have plenty of spool I'd be willing to give up and it seems power psi isn't as rewarding as it was in the 25 psi range(129 traps @25psi ). Only problem is finding one that will be a direct swap with my current one without having any clearance issues(turbine housing is hugging the block as close as I could get it) and without having to re-do the downpipe(not to mention having to exit at a sharper angle to clear the alternator). I think 16cm^2 would be a nice alternative. Then again it could just be the 264 intake cam but like Matt(dsmonster) said it does make a nice torque curve for the street.

 

[untouchablecc]

So your saying that a 18cm would be in your spectrum or just the 16cm. I noticed your still on stock internals like i am and you feel that a larger housing would not be a bad way to go? Are you currently running a 12cm housing? I am not shooting for an all out drag car i want to run good but still drive it when ever i want and i just didnt think running a exhaust housing that large would give me the spool up i want with the 18cm housing.

 

[viperlp01]

Then get the 17cm^2 that is right in between and build a twin scroll manifold. Twin scroll seems the way to go. It cost alittle more money to get the manifold but you are saving with our cheap turbos.

 

[JusMX141]

I have been kind of hunting down a 12cm housing for my set up.

If you're looking for one for a HX35 turbine, I literally have a pile of about (20) at my shop....come take your pick.

If you're looking for one for a HX40 turbine, you're going to be looking a long time....they don't exist to my knowledge.

 

[Mr Peepers]

I don't think you could go wrong with any turbine housing honestly, you just have to know what you want from the car and where you want your powerband. Not that the smaller housings couldn't make the power, but a larger housing may be able to do it at a little less psi.

 

[dsm-onster]

AMEN!. . . There is always a purpose for a setup. . . And there is always a setup for a purpose. Sounds silly and redundant; but really if there are things working, there's no reason to alter the whole scheme with something like altering the nature of the turbocharger. A cam alteration is one thing. And so is a better upper flowing intake manifold along with a a smoother entrance at the head.

 

[TSimage]

Hey jus.. is it possible for me to modify my hx52 with an available bigger wheel say maybe the 52pro or even something bigger? I wanna avoid going back to my BW475.

 

[dsm-onster]

Going back? How far did you get with either turbo ? Don't kick my a$$. I really want to know why you would change turbos with the potential of either? I recall you bellyaching about guying saying they are trying various holset turbos, then bailing. You where very upset they were doing that