The HTA 37R AMS tested was not the Garrett .82 . Quattro,Buschur made 628 on C-16 not VP-import,Buschur also tuned my HTA 35 on C-16.
Forced Performance has not yet released the HTA37R aka HTA 88 with the Garrett .82 turbine housing,4 bolt or v-band,3 inch.

 

That's the bad boy I was looking forward too not the one AMS tested wrong test

I wanna see HTA88/garrett .82 that's gonna be intresting I'm so tempted to try it out

 

The OP's car is falling off to 38.5 psi for the test, is this the same with Sharkbites? What was yours set to and rolling off to... if I remember your boost was over 40 the whole time on that 748 run, if I recall what was said in the post correctly.

Secondly, two different cars, different cams... wait, don't you have a carbon fiber driveshaft? This is a chassis dyno... what else? What rims?????

Now, that doesn't explain the testing on your car back to back with the different kits... only the two cars

 

Yes you are right about the two different cars and all.My numbers on Buschur's dyno were on C-16, 37R kit was 628/450.The HTA 35R made 649/535,on C-16.

 

But the .82 will be laggier than the .63 correct?

 

You are 100% correct crcain.

 

I'd say it differently

I believe that the combination of (1) a smaller turbine housing than recommended, and (2) a smaller wastegate routed back into the exhaust (assuming the AMS test was done using the AMS kit with their "off the O2 housing" wastegate setup) created a less than optimum set of conditions for this particular turbo's capabilities. But from the AMS perspective, it makes sense that they would do their test using the O2 housing that they include in the kit that they offer, right?

It's not a poor test, per se -- at best, it simply shows that using this particular parts combination the gains are different than were anticipated from the HTA35R testing. That's useful information if you're AMS and want to develop good test information for making turbo recommendations to their customers, using their kit parts and configuration.

I expect that more testing using parts closer to those that are recommended for this turbo will show a difference much more in line with those shown between a normal 35R and the HTA35R.

 

So you think that using a larger housing and an open dump will make the HTA spool quicker that the regular 37? (more in line with the 35r/hta35r)?

The HTA is making more peak power here, so which one do you think will make more peak power with a bigger housing?

 

Something worth thinking about, this turbo uses a T4 P-trim turbine wheel. It appears to be the revised P-trim with the improved aerodynamic features. I don't know about the rest of you, but I have seen VERY FEW P-trim powered cars break 720 WHP.

As far as the turbine housing choking it, that's hard to say. When you stuff a P-trim into a T3 housing, the wheel is big enough that when the housing is cut, the majority of the nozzle area in the housing is cut out. I believe the P-trim actually even sticks a little into the scroll area of the turbo. Now, I've never seen proof, but there has been claims that this kills turbine efficiency but does offer improved flow. I could see in this situation, the larger .82 A/R turbine housing doing very little for peak numbers simply because the limiting factor would still be the turbine wheel as it is a T3 issue and not an A/R issue.

This is an 80 pound compressor wheel, if I recall correctly. I do not think that we are seeing the limits of the compressor wheel at all on this test and we are merely seeing the limits of the P-trim in a T3 (any T3) housing.

FP needs to match this compressor wheel up to something more fitting on the turbine side. I'm not a fan of them, but the "GTQ" trim wheel has been proven over 800 HP numerous times. Toss it in the proper T4 housing and then come back with testing to verify that this turbo can not make more then 720 WHP.

I agree though, for what AMS is doing, this is a great test.

 

A T4 flange would be the cats azz, however it seems to me NO ONE in the Evo world uses these, and at some point the T3 has to become very restrictive???

A T4 flange with the p-trim wheel makes perfect sence at this power level. Many v8 guys use p-trm wheels and make outstanding power!!!

 

The gt series wheels are much lighter than the old school p-trim wheels. There for the I think the exhaust can spin the wheel faster and sooner, and keep it going longer on the top end. Now I also think if the sharks car was T4 flanged his power would be more than what you did?

 

You took the words out my mouth i was also waiting on more testing.

https://www.evolutionm.net/forums/sh...d.php?t=339470

 

Those are great numbers but that chart is also uncorrected...ours is posted in SAE

Eric

 

Which is a good thing to point out for sure. The incredible thing about that other car is that it was getting a new a*****e tore for dynoing so low last week, people could not kick that guy in the ***** hard enough (or crap on the turbo fast enough). Then they fix the broken valve spring and presto, car works all the sudden.

BOOST ON!

Robert Young

 

I made 735whp on a 67p trim and i could have made more.. This was with a .82 rear t3..