jj_008

iTrader: (8)

I made 375whp & 335 TQ at 22psi.

Steiner

iTrader: (3)

Vector...I've been going back and forth between the 3076 and 3071 myself. I think it's important to point out that there are some other (financial and performance related) things to consider besides the snail itself. I think engine management is a huge factor. You can spend all this money on a nice 3076 kit and then discover when it's tuned for race gas that the stock MAF is killing your mojo. That means throwing lots of money at something like an AEM EMS if you're going to get the most out of this big turbo on high octane fuel. On pump gas it's my understanding that the 3071 and 3076 put down similair power, but with the 3071 biting about 200-400 RPM's sooner. It's also my understanding that, when it comes to pump gas, anything short of a GT35 is fine for the stock MAF setup.

For me I've more or less decided on the 3071. I've never fed my car anything other than pump gas and I don't intend to start now. I'm also not interested in sinking all that money into a turbo + standalone EMS that only really becomes cost effective IF you run race gas. My EcuTek will do everything I need at a fraction of the cost.

I'm not trying to dissuade you from the 3076...just making sure you understand it only becomes better than the 3071 when you feed it race gas. And even then your MAF sensor may hold you back. Let us all know what you decide.

andenbre

iTrader: (4)

unless there is someone that can convincingly dispute this, you have just answered alot of my own questions and made up my mind on what I intend on doing to my car

Vishnu_Evo8

iTrader: (6)

dont get turbo upgrade for auto x.. its great for open track days and drag racing though, and teh occasional z06 thrashing on teh freeway.

andenbre

iTrader: (4)

I just plan on driver ed days and back road rips myself. I will wait and see what I can pull out of my stock 9 turbo though.

Vishnu_Evo8

iTrader: (6)

the 9 should make big power.. i cant wait till shiv makes an agressive race gas map on the dd dyno.. i wonder if it can make 350whp?

mmoranda

iTrader: (24)

Tell shiv you will give him a 9 turbo as trade towards a stage 2 or 3 kit. That way he can put it on an 8 and show us whats up.

rraulston

iTrader: (2)

so now the question is 3076 or 3037.......I have an AEM........

jj_008

iTrader: (8)

GT3037 is a GT3076.

Here is a little history lesson. Back in the good ol' days, before the Fast & the Furious, HKS decided they wanted to make a good, responsive turbo for a 4 cyl car. They went to Garrett for their turbo needs. Garrett was mostly making diesel turbos. So Garrett & HKS came up w/ a hybrid turbo that used a GT30 (60mm wheel) turbine and a GT37 (76mm wheel) compressor. The HKS GT3037 was born. As the years went by, the GT3037 compressor evolved from the old diesel wheel into the most modern version of the GT3076-12.

The GT3076 comes in few variations, -11,-12,-13. The -11 uses the smaller GT30 turbine wheel. The -12 is basically a modern CHRA that the HKS GT3037 uses and flows 52lb/min. The -13 uses a bigger inducer, flows 55lb/min, and is laggier.

It should be noted that HKS makes their own compressor and turbine housings. The turbine housings use a T25 flange instead of typical T3 flange.

Ludikraut

iTrader: (17)

If you have a stock Evo 9, then I don't think the 3071 will end up being an option for you. From what has been demonstrated so far, a tuned and cammed Evo 9 with full exhaust will come very close if not surpass a GT3071 based Evo 8, especially on pump gas.

l8r)

Steiner

iTrader: (3)

That's hard to believe. Not doubting you, but who is doing this testing? I've love to see some empirical evidence of their findings.

shiv@vishnu

iTrader: (20)

Just an update: Han's Stg 2 w/gt30r made 390whp at 28-27psi on ~98oct last night. On 91oct, it made 315whp at 22psi. With MS109 fuel, the system could support more aggressive tuning and potentially make 410-420whp. And it looks stock under the hood

Shiv

TwStDeVo

iTrader: (62)

is this on your dyno? if so, nice numbers, would the 98oct tune be the same as 91 and alky, if not then what would the results be like on pump and alky? is this the 3076r? how aggressive was the tune on 98oct?

shiv@vishnu

iTrader: (20)

Yep, this is on our DD dyno. As for 91+meth, I have a hunch that the numbers would be better due to the cooling effect of meth. The only problem is that meth tends to run out when you least want it to The 98oct tune was as aggressive as it could be given the fact that it was only running 98oct and not high octane race gas. I'll post up dyno graphs later 2day.

Shiv

TwStDeVo

iTrader: (62)

cant wait to see the charts! also, what octane is 91oct and meth comparable to?