CYM TKT

iTrader: (4)

If I was to make a custom T04S kit, what kind a of specs would I want to get on the turbo.. A/R, trim, etc etc.

thanks.

Manolis_D

iTrader: (2)

What're your goals? Stock ports? What will the car be used for?

As a general rule, many people seem to use something close to the following specs:

.70 A/R Compressor housing
60-1 compressor wheel
P-Trim exhaust wheel
.96 Undivided (or 1.00 Divided) exhaust housing

That's good for about 7psi by 3500 rpm or so (5th gear pull) on my stock port 1990 TII. If I had to do it again, i'd probably drop down to a .84 A/R divided exhaust housing -- helps spool up a bit and doesn't really hurt power much at all (especially not with the stock ports).

Give us more details!

-Manolis

CYM TKT

iTrader: (4)

ah sorry. I have pineapple racing street port, and I would like to make about 400 rwhp or so on pump gas around 15psi.. mostly a street car, but drag and autocross sometimes. if it spools by 3500/4000 I will be happy. when I go to the drag strip I would like to be able to turn it up to 20 psi on race gas. I will be using a microtech ecu, so the tuning shouldnt be a problem with rolo about an hour away.

I always though we used big A/R's like 1.15 or so? Im new to all this single turbo business, so bare with me.

Wargasm

A 1.00 divided with those other specs will get you 400 rwhp right around 15 psi no problem.

Brian

Spoolin7N

i asked this question a while back and riceracing recommended the .70 compressor and a 1.15 div turbine (i have the obx mani) with the 60-1. i have a local turbo distributor in town and bought a new turbo from him with all requirements except that it has a garrett -17 wheel (?) whatever that is. it has a 58mm inducer with a 75mm exducer. i hope that it will put past the 400rwhp mark.

vspecpgt

spoolin, do you have this setup on your car now? i just ordered the obx manifold and am wondering what turbo i should get. does the 60-1 with those specs fit without hitting the intake manny or the frame rail or did you modify it someway? thanks.....
ps do you think a t66 would fit without hitting anything?
harrison

weitzel1

I have the obx manifold. I was wondering what size wastegate I need and where is the cheapest place to buy a T04S with the apove specs.

Spoolin7N

no chance in hell of the T66 fitting. i haven't got it on yet- too many other things going on. that cars been on the back burner for over a year now. just been buying here and there. bacon has this setup and he said that a cure was to buy an exhaust flange from racing beat and another set of exhaust gaskets and use it as a spacer. he had a thread about whether or not to weld it to the obx but was recommended not to due to the different metals and expansion properties under heat(RB flange- mild steel/obx mani- SS). i was fixing to pm him and see how he's coming along til i checked back here.

the wastegate is a greddy/hks style flange. i was thinking of getting the tial 40mm and welding a new flange on it due to cost(i can get it close to that) instead of the hks or greddy. and how close are you to getting your car running? i might sell mine since i realistically don't see me finishing this car this year. better to help someone than be a scrooge......but people don't think i'm coming off my powerFC and datalogging/wideband setup!! that stuffs staying right under my bed where it's safe

DChan415

So the Tial 40mm wastegate wont fit onto the OBX manifold without welding the new flange? I have the OBX manifold, but no wastegate yet. The pictures I saw of the Tial 40mm flange looked similar to the one on the OBX manifold.

RacerXtreme7

iTrader: (2)

[QUOTE Spoolin7: i asked this question a while back and riceracing recommended the .70 compressor and a 1.15 div turbine (i have the obx mani) with the 60-1. i have a local turbo distributor in town and bought a new turbo from him with all requirements except that it has a garrett -17 wheel (?) whatever that is. it has a 58mm inducer with a 75mm exducer. i hope that it will put past the 400rwhp mark.]

Sounds like a T04B Super H compressor wheel. (2.298" inducer 3.00" exducer, or 58.37 mm and 76.20mm) Thats the only thing in the standard garrett line I find thats close. Its smaller then a 60-1 (2.324", 59.02" In and 3.00", 76.20mm EX). Some people are able to get to the 400whp mark with a 60-1 with the right combo of parts / ports and tunning, but not everyone is able to get to that 400 mark. You got a slightly smaller wheel then a 60-1, however I'm not positive what you got, so making 400 hp might be a challenge. Then again, no telling what that wheel is, it might have a large B-width.

The OBX manifold has a HKS/GReedy wastegate flange like they say, a TIAL wont bolt to it. But rather then cuting up/welding your OBX, you can make an adapter from the HKS to Tial.

~Mike

weitzel1

Is it the standard 40mm HKS/Greddy wastegate, the Gt wastegate, or racing wastegate that fits on the OBX manifold?

fastrotaries

Davis you're one nutty bastard. GO with a TOE for your applications.

88fc3sw/HX83

The HKS Standard and Racing WG will both bolt up. The HKS Racing SS and GT WG have different flanges.

88fc3sw/HX83

T66 will fit with some spacers, been there!