Same turbo but not same housing. The FP DSM housing is bigger and flows better than the 5 bolt 0.63 A/r.

 

Interesting... well the tuner himself rocks a 50 trim on his dsm and makes 70 more ft/lbs of torque and was getting 450-480rwhp. AMS was saying the only manufacturer of the .82 turbines didn't make a very reliable product... hope they wern't talking about treadstone.

 

It's not from Treadstone, it all comes from ATP they are just resellers of the recast housing. The thing is even a 0.82 5 bolt ford style is too small, it needs to be a T31 4 bolt or V-band.

 

I guess the best test would be simply to disconnect my recirc wastegate and vent it to the atmosphere to see how much power i pick up.

 

You'd still pick up more power with the larger housing. I'd listen to Aaron (John Bradley) personally, he KNOWS his stuff, it isn't speculation and if it is he would say so!

Either way, good luck with your build and quest to max out that turbo, I'm in to see the results!

 

I doubt it will do anything. Your problem is pre turbo not post turbo
The larger housing will do the trick

 

the GTX3076 has the same problem as the HTA3076. the 30R turbine. Running a larger housing will help coax more airflow along with bigger cams "might" get you close. however the real problem is the turbine wheel sucks *****. The 3076 is a bad mismatch compressor/turbine. Over-rated turbo IMO.

If you want to stay garret then the hta or gtx3576+bigger cams is really your answer.

 

If thats the case then the t3 vband housing from ATP is my best option.
http://www.atpturbo.com/mm5/merchant...egory_Code=GTH
What would a 1.02 housing do to my precious 4.5k power band :O Or could i go with the .63 option and still see top end gains?

 

3076 is one of the best street turbos you can buy. You just have to be smart when picking your supporting parts.

I made 562awhp and 484awtq on a old school FP3052,2.0,9.0:1,small SMIM, Old school hks272s, E85, 32psi dropping to 29 out the top.

 

1.02=the spool of a pte bb CEA6262 with 100+ less hp lol

 

Perhaps the best thing to do is weld a nut onto the egr block off plate to measure exhaust manifold pressure. Anyone know if it's the upper or lower hole on the egr that is exhaust?

 

Left side (no top/bottom). If you stare at the side of the intake manifold you can see how the "tube" is cast into it for the EGR.

 

What are the #'s i'd be looking at that would indicate it's not a huge restriction and what # do you think i'm likely to see?

 

Ideally we always want backpressure less than boost or no more than a 1:1 ratio. You run 30psi we'd hope to see no more than 30psi. I am thinking you well see more than that, how much more not sure, since the torque is starting to drop so drastically past 6200.

For reference on a 6262 we saw 34psi of backpressure at 27psi in 0.84 T4 housing.

 

- GT3076 has never been a good pump gas turbo because of the restrictiveness of the turbine wheel. However C16, E85/e98 people are able to coax an .82 housing to 50-52 lb/min range because of the anti-knock properties of the fuel.

- When you see the dyno comparisons between the GTX and the GT3076 you will notice there isn't much difference. The turbine wheel is the issue. I would be willing to bet the the GTX doesn't make much more power maxed out than the GT3076.

-There are LOTS of other turbos that outperform it. Case in point. Holset HX40 will absolutely blows it away. See below. Same car, same dyno, no other mods besides a turbo change to a Holset HX40 in a T3 .55 housing. 2.3L DSM, HKS 272 cams. Its also important to note that the GT3076 would NOT boost any higher than 30 pounds. It was done.


- I am not saying to go with a holset. However you can see how under performing a GT3076 is when a 20 year old diesel truck turbo blows it away. The HTA, EFR, and GTX turbos out perform anything a holset or GT turbo can make. Hence why I would drop that turd to a HTA3576 at a minimum. Or hell HTA3582 with give you some extra breathing room (but might be a bit laggier than you want)