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Holset Turbos, PART 5

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The Hx35 turbine wheel does not flow as much as the Hx40 so it would require more of a wastegate passage.
 
Some creap. Mine didn't. Even with no exhaust. If it does you'll wish you had it off. Although if you're planning on running a 38mm gate. It would be a waste to port more than that. Radiusing the entry of a 38mm hole in the housing is all that you should need to do.
 
Some creap. Mine didn't. Even with no exhaust. If it does you'll wish you had it off. Although if you're planning on running a 38mm gate. It would be a waste to port more than that. Radiusing the entry of a 38mm hole in the housing is all that you should need to do.

Just ordered my HX40, in the mail. So which is the better route for a DD car, the BEP .55 mitsu housing, or the T3. Looking for at least 400-450 ponies, more after this car turns into a track or road race or time attack car.

James :laser::talon:
 
Just ordered my HX40, in the mail. So which is the better route for a DD car, the BEP .55 mitsu housing, or the T3. Looking for at least 400-450 ponies, more after this car turns into a track or road race or time attack car.

James :laser::talon:

DSMLink was estimating 470hp on my hx-40 car at 25psi on the Mitsu .55 housing.
 
I know it may be kinda anal but my hx52 has very slight play in it. Too much for my likings as I plan on running 45psi so I picked up a rebuild kit from goldfarb today. I'm just gonna have garden state diesel rebuild it so it's perfect and I know it's good to go. Anyone looking for good rebuild kits should hit them up they only charged me 75 shipped for it.
 
Looks like someone has been poking around diesel forums a bit. The diesel guys seem to be popping these hx52's quite often.... they claim they are a very "unreliable" turbo and you should be going with turbos with better exhaust housings (for diesels). Leaves more for us at least , yay!

I am going to be picking up a 52pro here soon, going to be doing a mid 800whp 2jz next month.
 
Looks like someone has been poking around diesel forums a bit. The diesel guys seem to be popping these hx52's quite often.... they claim they are a very "unreliable" turbo and you should be going with turbos with better exhaust housings (for diesels). Leaves more for us at least , yay!

I am going to be picking up a 52pro here soon, going to be doing a mid 800whp 2jz next month.

No I don't look at diesel forums I just really am anal with turbo's now after my experience. Figure another $100-$150 to know that I have a stout turbo, def worth the investment. I don't know what you mean by 52pro but I take it you mean billet wheel hx52 but either way good luck to you on your build.
 
DSMLink was estimating 470hp on my hx-40 car at 25psi on the Mitsu .55 housing.

And do you feel that your car had more it could do. Any drop in boost at all? I have 280 cams, q45, magnus race manifold, 3 inch cold side from intercooler, race porting from Wes Hess (may he RIP, also the last head he did), built 2.0 block. This car is stout. I want to run this car to at least 8200-8500 rpms. I dont want the turbo to not perform in the upper ranges, and leave me hanging.

James :laser::talon:
 
And do you feel that your car had more it could do. Any drop in boost at all? I have 280 cams, q45, magnus race manifold, 3 inch cold side from intercooler, race porting from Wes Hess (may he RIP, also the last head he did), built 2.0 block. This car is stout. I want to run this car to at least 8200-8500 rpms. I dont want the turbo to not perform in the upper ranges, and leave me hanging.

James :laser::talon:

The car def had more in it, I simply blew the hg and put it away for the time being. I'm also rockin 280 cams and revvin to 8500. Car really comes alive at 4500 and never stops pulling. Don't let the small bolton housing mislead you. While the car was running it most def. had my "sig" HX-35 car beat hands down. Blowing the tires off from a roll in AWD is pretty amazing....
 
I know it may be kinda anal but my hx52 has very slight play in it. Too much for my likings as I plan on running 45psi so I picked up a rebuild kit from goldfarb today. I'm just gonna have garden state diesel rebuild it so it's perfect and I know it's good to go. Anyone looking for good rebuild kits should hit them up they only charged me 75 shipped for it.

A dry journal bearing turbo is going to have ALOT more play in the shaft than one that has had oil run through it recently. But a rebuild for a used turbo is always a good thing.
 
The car def had more in it, I simply blew the hg and put it away for the time being. I'm also rockin 280 cams and revvin to 8500. Car really comes alive at 4500 and never stops pulling. Don't let the small bolton housing mislead you. While the car was running it most def. had my "sig" HX-35 car beat hands down. Blowing the tires off from a roll in AWD is pretty amazing....

So, you are saying that, the HX40 with the dsm housing will take you into the 10's?

James :laser::talon:
 
And so how well are these turbos working with pump gas?
 
A E3 16g will make comparable numbers with much better spool.

What gives?
 
A turbo provides volume flow. What you do with it and how you measure your results is up to you. Asking for dyno numbers, which vary so greatly from user to user and brand to brand, is superfluous. At least be asking for 1/4 trap speeds, which gives consistancy across the board where race weight is accurately known. Data pointing to volume flow at certain boost with general modifications is what you need, as pumpgas has a general limit of tolerance from heat and such heat is much more heavily biased towards increased PR vs compressor efficiency. What you do with that increased flow potential is up to your skill and your money invested.

With that said, as the turbine flow potential increases so does the flow per psi of boost. For example, my bolton h1c (hx35 turbine wheel) flows 2 lbs/min more at 2 psi less and 15 degrees warmer intake temp at the same altitude vs. my 16g which was NOT at maximum compressor flow (this data was taken at 30lb/min). Clearly a much higher volume flow per psi is exhibited with the hx35 turbine wheel and .55 a/r housing as opposed to the 16g turbine wheel and turbine housing after the sole, direct swap. It is showing the higher volume flow since there are 90 more hertz (volume flow number) at only 5300 rpms and less boost. 2.0L, STOCK manifolds, fp2 cams, 3" exhaust, ebay fmic. To get my 16g to flow 2lb/min more or display over 90hz more volume flow metering would take a smim upgrade in the least at the 2psi higher boost than the bolton h1c; or 2-3 more psi of boost, which would degrade pumpgas potential.

How much more would an hx40 *flow per psi*? Datalogs of the hx40 in the bep housing showing flow and spool speed. Stock Block/Head/Intake mani, BC272, FP Race Mani, FP Intake, 3" DP w/ 3" Cutout, over 50lb/min at 26psi. 20psi by 3900rpms. Very similar basic upgrade list to Kawboy and me. Versus my 16g at the same 5300rpms, the hx40 displays 10lb/min more airflow at 10 degrees less inlet temp and only 4psi more boost. Even if 4psi increase equates to around 5lb/min more flow, it's not even comparable. Of course, the hx40, or even the hx35, won't fizzle out after 600cfm or 2700hz (safe metering limit of the 2g maf) like the evo3 16g will.
 
That is true..

But "only 4 psi" is a huge jump on pump gas ;)
 
If the hx40 car logged at boost pressure 4psi lower, what would the flow be? The turbo is flowing over 50lb/min at 26psi with a stock intake manifold and a 2.0L motor! My logs are proof that the hx35 in the bolton housing flows way more than a 16g at the same 'pumpgas usable' boost under choke flow. If all you can manage with a decent tune and pumgas is about 22psi (this is all I could do before injecting water), then the 4-5lb/min more flow that the bolton hx35 provides at that same boost speaks for itself. The larger turbine wheel of the hx40 will afford even more flow at the same boost. This is what I was getting at.

Yep. 4psi means ALOT with pump gas. BTW, the hx40 car linked to above was running 93 octane with no injection ;)
 
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