Ive been looking around for a while and still hardly understand what all these numbers mean. I know I need to find the volumetric efficiency of the motor, how much air it can flow, etc. Can anyone help me with some websites or something?

Im looking to find the correct turbo for a 231 ci motor and looking to hit 400+ whp. An S2 or S3 turbo cam and all other goodies im my sig will be on the motor too. So far most people with this engine are running the following turbos. I need help finding out what my A\R's should be on the hot and cold side and the wheel trim.

One of them is the Garrett T04S 60-1 (0.70 A/r, 0.69 on the exhaust), TIAL 38mm w/g, and HKS SSQ
Does this sound like a decent setup? If so how much would one run?(Terry?)
Since I have a higher stall converter I would like something that spools by 2500-3000 rpm and ends up around 6500-7000 rpm.
Thanks for any help.

Thought I would add that the 400 whp was attained with the above turbo (in kit form), a very small shot of nitrous and a stock motor.

 

anyone?

 

garret has compressor maps on their sight for pretty much all the turbos they carry. also try and pick up a copy of maximum boost by corky bell, amazon.com should carry it. the book has all the info you need to pick the right turbo for your car. good luck!

 

hey pm me with some specifics like how much boost you plan on running, liter of motor, how much HP your lookin at now and down the road.
I am to lazy to explain it all
But basically I look at the compressor map to determine compressor housing/wheel size and the there are conversion charts for specified turbine sizes. I can offer you advise if you wanna pme me.

Or you can try calling SP or turbonetics and they genereally give good advise

 

I have a garrett T70 with a 71. inlet and a 84. outlet a/r, its good for 600WHP+, I am trying to get rid of it ASAP i got bills I will sell it for 450 bucks.

P.S. Its brand new with no shaft play and spins freely.

 

Thanks chapter8, Im sending you a PM soon. My goal is to hit around 20lbs I\C'ed on a stock bottom end. Im looking for the 400+hp mark and the motor is a 3.8 liter with compression around 9.6:1, home ported heads and the cam will most likely be changed since its an NA cam in there now. I just have trouble reading the maps.

Here are the cam specs if it matters.
The Stage 3 Turbocharged Cam should NOT not be used with stock cylinder heads and/or stock valvesprings. It is engineered for use with highly modified cylinder heads and oversized valves, and is a perfect match to the INTENSE™ Stage 3 CNC L67 Cylinder Heads. The powerband is strong from 3,000 to 7,000 RPM.

CAM-903 - INTENSE™ Stage 3 Turbo Cam, duration @ .050": 223º/214º, lobe lifts: .338"/.332", valve lifts with 1.60:1 rocker arms: .541"/.531", lobe separation angle: 116º, intake centerline: 110º


SR20DETNX2K, are you selling this on SCR too? I talked to a guy about one there.