Thread: Help to get 450-500 hp

What pistons are you using to boost 24 psi?

How reliable is this unit?

GT30R/T3 BALL BEARING TURBO .82 TURBINE .70 COMPRESSOR by JDM Sport its 50% cheaper than garett



GT30 Dual Ball Bearing Turbocharger!!
Oil and water cooled cavity for longer life expectacy and reduced oil cooking.
Huge T4 .70 ar compressor housing with built anti surge ports for excellent high hp applications.
Large single scroll T3 turbine with 59mm x 45mm inlet opening .82ar for fast turbo response and low back pressure.
Shaft bronze bushing used for fast turbo spool & low friction.
Dual cartirige ball bearing center section for faster turbo response and higher spool efficiency.
High performance bronze thrust collar bearing used for low friction.
High performance cromoly oil ring's used for long life expectancy.
Light weight ductile casting only weighs 15.80lb for reduced manifold strain.
Compressor Spec:
T4 .70ar housing
4" Inlet
2.5" Outlet
Big shaft T4 compressor wheel
61.37mm 2.416" minor
81.96mm 3.227" major
Coolant cavity thread 14x1.5 banjo bolt style
Turbine Spec:
.82ar
Large mouth t3 opening 59mmx45mm
75.32mm 2.965" turbine housing outlet
High flow tapper 4 bolt outlet with 99.60mm 3.921" spacing
Big shaft T4 turbine shaft
62.26mm 2.451" minor
67.78mm 2.668" major

these 2 together dont make much sense ....

Shaft bronze bushing used for fast turbo spool & low friction.
Dual cartirige ball bearing center section for faster turbo response and higher spool efficiency

I would stick to a PTE or Garrett , or a Borg Warner for the best results , no Ebay copys.....And as for the the GT35r and the SC6262 , I have used both on the same setup and the GT35r was a tad faster spooling , but the SC6262 I have is the non BB model and the GT35r I have is BB , they are both great , but if I was building a race car such as the one you are building , I would look at a smaller gt30r ( like the GT3071r ) and you will make 450whp , but you will have power through a larger powerband , inless you plan or reving to 9k like some of us do , but most of us that do we are not racing the cars on a short couse the kind of power I am making will smoke the tire in 4th comming out of a corner , it it was me I would be focused on response and relibility , at these HP levels keep the oil temps in check is going to be tricky really tricky in a drfting trying to pass situation like you should be seeing in a short track race .....I am only saying this because high oil temps kill bearings and the power you make the high your oil temp I would rather have a 350-450 whp car that lasted and and was responsive then a car that made 500whp ( that had a turbo capable of 700+whp) and was possibly being a little to laggy , but if I was on a big course like Laguna Seca or somthing I think the 500whp car would be great ......but on a small track the larger setup would be like lighting a bottle rocket and wating for the fuse to burn , for the car to build boost out of every corner ......but this is just my opinion

i have a ve head gt3071r stock det block and im rippin 3rd gear on 16psi over 16 i lean out my injectors before wot made 360 on 12psi. i know a guy makin 480 with a t28 on 25 psi 11s all day on the track

What injectors are you using?

msd 50lb

JE 8.5:1 VE-T pistons.

I think for 450whp the GT3071r is your best bet. It will do 400whp rather easily, but won't surge like the GT3076r can on a small housing. The .82ar rear housing is the only one to get on the GT30R turbos, because you don't sacrifice ANY response going with the larger turbine housing. It's actually proven that the .82ar housing on the GT30R is more efficient and spools nearly identically, but makes a lot more power.

Largest T2 turbo avaliable? I'm seeing 2871....

The GT2871r is same compressor as the GT30 series, but the turbine is slightly smaller. I think the GT2871r with the .86 exhaust housing will do pretty good #s if you get the right CHRA. BTW they make like 6 different variants of the 2871r. Some rated as high as 475hp.

last time I did the VE-T project the engine exploded at 15psi with some 350++ Hp on T3 but it has nothing to do with the boost but rather the N1 cams i used. I have JE pistons on mine right now DET thou, it doesn't have the valve pockets.

Say, I go with OEM VE cams should I still replace the pistons with VEt's going on high boost? Or just keep the RPM managed if I wanna push it to 400?