Holset Turbos, PART 5

[dsmmatt28]

Hey guys last night i tryed to install my H1C setup i wanna run. But I came across some clearance issues. My compressior housing and exhaust housing are both hitting the block! The exhaust housing is hitting big time and the compressior is just a tiny bit. So what choices do i have to go with. Im definetely thinking the 21cm housing is gonna have way to much lag. Heres some pics. What do you guys think.

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Thats a big ass turbine housing. Its going to have some lag for sure.

 

[matt98eclipse]

My plan was to route the wastegate back into the exhaust then do a 3inch right out the front drivers side bumper. I still need to order the alternator relocation kit. I think it would sound nice with the new set of BC 272's i just got.

 

[95GSXCO]

Is that a Ebay header? If so I had the same problem with a 50 trim. One way I have seen it be fixed is to buy just a t3 flange and shave one side to make a wedge. It sucks because you will have to readjust your exhaust because you will be mounting your turbo 1/2 lower.

 

[matt98eclipse]

It is in fact a ebay header i figure what the hell ill give it a shot and see what happens. What your saying might just work.

 

[Raymos24]

Hey guys...Quick question about an oil line. I have an H1E in a BEP bolt-on housing and I have been literally everywhere to buy the oil feed line. I used to have a garret style turbo so I have the return line but not the feed line. The H1E has a 3/8" oil inlet and thats it so the adapter kit on extremempsi seems not to apply to it. Any help would be appreciated I have been to countless autozones and home depots to try to find an adapter. The end of my oil feed line right now i think is 1/8". Thanks for any help and sorry for the ridiculously long post.

 

[dsm-onster]

Matt, find a used hx35 turbine housing or buy a blown to he!! hx35. No need to even have fins left on the wheels. Use the turbine housign. It could very well clear as it is a 12 cm^2 turbine housing not a 21cm^2 housing. It will bolton if you can find 2 more bolts and grind down some washers on one side for clamping. The hx35 and h1c wheels are the same. And the hx35/h1c turbine wheel with the 12cm^2 turbine housing with the divider radiused and portmatched to the garrett flange will flow PLENTY to max out any h1c compressor wheel. Your spool will be 20ish psi by about 4K in 3rd gear, too.

 

[GST95]

Matt, find a used hx35 turbine housing or buy a blown to he!! hx35. No need to even have fins left on the wheels. Use the turbine housign. It could very well clear as it is a 12 cm^2 turbine housing not a 21cm^2 housing. It will bolton if you can find 2 more bolts and grind down some washers on one side for clamping. The hx35 and h1c wheels are the same. And the hx35/h1c turbine wheel with the 12cm^2 turbine housing with the divider radiused and portmatched to the garrett flange will flow PLENTY to max out any h1c compressor wheel. Your spool will be 20ish psi by about 4K in 3rd gear, too.

You still might have to use a spacer between the head and manifold. It will depend on how the manifold is shaped. I had to do this with my ebay header and wh1c with 12cm housing. You just need a flange, longer studs and an extra gasket to space it out. On my manifold, the turbo flange was turned slightly for compressor clearance which caused lack of clearance for the exhaust outlet.

 

[dsm-onster]

Still recommend the the 12cm^2 housing vs. the 21cm^2 housing

 

[Wicked95AWD]

Roughly how fast should an hx40 pro w a divided t4 mani and 18cm^2 housing spool? I'm shooting for 4k rpm spool and 650+whp on a 2.4 liter. Should I go with a smaller housing instead?

 

[dsm-onster]

No one knows at all. No one has done this before. I'd IMAGINE it would spool about as fast as the bolton BEP housing with the hx40 turbine wheel being that the 18.5cm^2 and 19cm^2 turbine housing has individual volutes with a critical area about as large as the bep bolton housing.

 

[GST95]

Still recommend the the 12cm^2 housing vs. the 21cm^2 housing

x2

 

[Wicked95AWD]

No one knows at all. No one has done this before. I'd IMAGINE it would spool about as fast as the bolton BEP housing with the hx40 turbine wheel being that the 18.5cm^2 and 19cm^2 turbine housing has individual volutes with a critical area about as large as the bep bolton housing.

In that case, I guess I'll be a willing guinea pig. The hx40 pro is balanced and on it's way back to polk now. I should have dyno results in two or three weeks.

 

[TimG]

I run a 12cm2 housing and it's definitely laggy. I'd IMAGINE a 21cm2 housing might not even spool.

 

[Wicked95AWD]

Twin volutes should improve volumetric efficiency and part throttle response while alleviating some lag and preserving top end power. A single large open scroll mani and hotside would likely be pretty laggy in comparison.

 

[matt98eclipse]

Thanks matt. I will keep my eye out on a 12cm housing. If anyone has one they are willng to sell pm me!

 

[talonDSMerr]

I think I have one I can get rid of. It's off a wh1c. How can I tell if it's 12cm?

 

[matt98eclipse]

Could you send me a pic of it?

 

[matt98eclipse]

Hey wiseman the wh1c and h1c have the same turbine wheels right? If so member talondsmerr has one he would sell me but im wanting to run a a external wastgate setup how would this work being the wh1c is factory internal wastgated. Would i need to buy a different type of flang. Im really wanting to run a 3inch vband exhaust.

 

[95burgundyesi]

I don't know where to post this so I am adding it where I think it fits best, I am trying to get a group buy on holset bolt on housings for hx35 and 40s going, I am getting one no matter what but figured witha ll these people attempting and buying holsets I could get a few names on a list once I get a hear back. Should be coming shortly

 

[We're on Boost]

Hey guys, I figure a bullseye .55 a/r turbine housing would have a "nozzle" area of about 7.3 square cm. That's just from my calculator and the fact that Robert Young says his FP30 turbine housing is 9 sq cm or about .68 a/r. Anyway, even if you had one apart the actual A would be hard to measure, right? But do you think 7.3 sq cm sounds about right for the bullseye housings?

Gary

 

[talonDSMerr]

I don't know where to post this so I am adding it where I think it fits best, I am trying to get a group buy on holset bolt on housings for hx35 and 40s going, I am getting one no matter what but figured witha ll these people attempting and buying holsets I could get a few names on a list once I get a hear back. Should be coming shortly

It would probably have to wait. From the sound of things, TimsTurbos is all out and TheTurboTrader had only 2 left when I called and ordered mine yesterday. The things are flying off the shelf full price, I don't think they need to do a group buy..

 

[dsm-onster]

But it would be nice of them. And they would be able to hit the market hard with their next production batch. They could make a huge batch really worth their while with a good group buy.

We're on Boost, we cant really compare the a/r numbers across brands. the 7cm^2 dsm turbine housing has an a/r ratio close to 0.55 a/r. but the R is much smaller than the BEP bolton R. You need to actually get an AREA at the same point along the volute between housings to make a comparison. Actually all that matters is the area, since it is only that which changes the angle of the exhaust flow over the blades; not the inlet hole area. There's comparison pics floating around here of the BEP bolton, FP30, 7cm^2 MHI, and .63 a/r bolton PTE areas at about the same point on the volute. The BEP area is much bigger than the 7cm^2 and the pte bolton. The FP30 is larger still. The BEP has a centered volute, while the PTE and MHI are offcenter. So not only is the MHI 7cm^2 housing have a smaller area, it has a much less efficienct design that henders flow and spool. This is why swapping from the MHI to the BEP bolton housing for my 18g had very little effect on spool but flow still increased.

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EDIT. . . . .

That little bulge to the left in the critical area of the MHI volute has the blades in it so that part isn't included in the volute area.
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Wicked95AWD, twin volutes act as one big volute (the sum of the the two small volutes) when runnign a nondivided runner manifold.

Matt98eclipse, All wh1c turbos from the factory came with wastegated 12cm^2 turbine housings. The wastegated version I think comes with a vband outlet 100% of the time. You just need a way to keep the gate shut as it only vents one volute (NOT good for performance or boost control with a gaser). Here is one option.

Wh1c turbine outlet:

 

[Wicked95AWD]

Wicked95AWD, twin volutes act as one big volute (the sum of the the two small volutes) when runnign a nondivided runner manifold.

Matt, I know that twin volutes act as one large one when running a nondivided mani. I was subtly trying to suggest that the reason TimG found the 12cm^2 to be laggy was probably because he is using an undivided t3 manifold. If he were to switch to a twin scroll (divided) manifold I would be willing to bet that the lag he is experiencing would drop significantly.

 

[SpeedAddict62]

So what do you think would be the optimal turbine housing for a HX35 on a 2.0L with a divided mani? I already have a 12 cm^2 housing and was planning to run it...but I'd be willing to trade someone for a larger housing and spool would still be reasonable and top end flow improved.

Also, does the wh1c turbine outlet bolt to the hx35 housing? I would love to find one, it would save me having a custom flange made and that v-band would be perfect.

 

[dsm-onster]

Yes the wh1c will work. See my above post about what you may need to do.

The 18cm^2 housing found on the big and small h1c turbos has individual volute size about the same as a bep bolton volute. You should have similar spool (or perhaps a little better) with mcuh better VE up top, because of virtually no back pressure issues.

Matt, I know that twin volutes act as one large one when running a nondivided mani. I was subtly trying to suggest that the reason TimG found the 12cm^2 to be laggy was probably because he is using an undivided t3 manifold. If he were to switch to a twin scroll (divided) manifold I would be willing to bet that the lag he is experiencing would drop significantly.

Oh I see . I think tim knows that too .