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Holset Turbos, PART 9

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I am aware they are going to release it, but to me it looked like they were going to use the T31 housing, not the FP30 which is what I have. Looking for clarity.
 
The FP35 housing is just a FP30 housing that has been machined out. If the FP35 housing can be used then a FP30 housing could also. The FP30 housing is different from the FP T31 housing though and from reading that thread it looks like FP is starting with the T31 housing and machining it to fit the Holsets.

Do you have a link to the guy that used the FP35 housing?
 
urbansmoker1 said:
Someone here has used the fp30 housing, (for the dsm82) i believe and machined it. I thought the t31 was smaller than the fp35 housing.
Click to expand...

He said FP30....not FP35. And yes....a t31 is smaller in terms of turbine size but they're all .68 housings
 
rr06rs said:
He said FP30....not FP35. And yes....a t31 is smaller in terms of turbine size but they're all .68 housings
Click to expand...

He said FP 30 but he mentioned it was used on a DSM82 - Aka 3582. The FP30 and FP35 turbine housing are the same housing - one is just machined larger for the 35 wheel, so I'm missing your point.
 
92 GSR-4 said:
He said FP 30 but he mentioned it was used on a DSM82 - Aka 3582. The FP30 and FP35 turbine housing are the same housing - one is just machined larger for the 35 wheel, so I'm missing your point.
Click to expand...

I was saying YOU said FP30. That's why I quoted his post in my response. That wasnt directed to you.
 
I'm using an FP housing on my holset but its a t31 and the turbo is a h1c/hx40 pro hybrid so its using an hx35 size turbine and therefore, not really helpful to your question.
 
I can take measureme of my hx40 bep housing if you want turbine hole measurements
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if you wanna know how big it needs to be to fit the hx40 turbine. (Mine is 12 blade)
 

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rr06rs said:
I'm using an FP housing on my holset but its a t31 and the turbo is a h1c/hx40 pro hybrid so its using an hx35 size turbine and therefore, not really helpful to your question.
Click to expand...

No, but it sounds cool. What kind of results have you had with it?
 
I thought this might be useful. It looks like if I'm correct that 37psi (2.6 bar) is the max efficiency to getting the most flow out of the hx40 pro?. Am i reading this correct?
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That would be the farthest charted point to the right, yes. Choke is not going to be immediately on the other side of the line, but its like between the 9000 and 10000rpm lines horizontally. Now whether your motor ends up their at that boost and rpm relies on your combinations actual VE.
 
urbansmoker1 said:
What manifolds are prople running with the 52 out of curisoty. They barely fit in the bay.
Click to expand...

I would imagine a custom top mount. Thats my plan anyways, cause I'm currently driving a 63 swapped 89 colt, so there aren't many manifolds that would fit
 
As far as the turbo is concerned I have a ton of room. Bottom mounted, custom divided manifold, you can see in a few shots I have as much as 2 inches between both housings and the extra thick radiator, and no less than 3/8th inch from the block at any point.

Its everything else to support a turbo that size which makes it tight, add a few optional extras like all my hotside sensors, a giant oil cooler, scatter shield, twin wastegates and dump tubes, three meth nozzles, 3 inch charge pipes, etc LOL
 
urbansmoker1 said:
I thought this might be useful. It looks like if I'm correct that 37psi (2.6 bar) is the max efficiency to getting the most flow out of the hx40 pro?. Am i reading this correct?
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Click to expand...

Isnt it 37psi absolute pressure so its 23psi??
 
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urbansmoker1 said:
37 psi is 37 psi I'm not sure what equation you are doing, but holsets are efficient in high boost 6&7 blade, no way in hell 23 psi is gonna flow you 69lb a min...
Click to expand...

This isn't my first Holset sunshine, I've probably run more boost than you ever will.
23psi might not flow 69lbs on a 2l but on a 4L you might just flow 69lbs at 23psi. Can someone confirm the Y axis is absolute pressure or gauge?
 
The Y-axis is PR.. pressure ratio at the outlet vs inlet, under whatever conditions the compressor wheel was tested or used at as a function of turbine shaft speed.. That is all.

So 1.0PR, where the vertical axis meets the horizontal at the origin of the map.. would be atmospheric pressure. 2.0PR would be twice atmospheric.

If this is done at "sea-level" or DA 0ft then 1.0PR is 14.7PSIa, or 0PSIg

2.0 is 29.4PSIa or 14.7PSIg, and so on.

So caged is correct. PR2.6 = 39.2PSIa (Absolute) or 23.5PSIg ( Gauge indicated, or "Boost")

Bear in mind, caged has a compound setup on his 4G63 and the HX40 is his Atmosphere/Primary turbo.. he is artificially inflating the size of his motor with his Secondary/HP Stage turbo.

This means he will have a greater Engine Demand Flow to plot for each RPM line and he will need less engine speed and lower boost to max out the HX40.
 
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