so im having a pretty hard time with choosing what turbo would be best for my set up. i have a built motor and forged internals with 10.5 compression but im not sure what would be reliable and efficient for my dd. i know i want a t3 of some kind and about 300hp or so with a little room to grow. i was looking at a hx35 but im not sure if i want to go that way or more of a bolt on system. i need something with an a/r .63 or little bigger to keep my egt down but thats all i really know. im pretty new to understanding the advanced side of a turbo set up so any advice would be appreciated thanks.

What are you tuning with? MS? if your only looking for 300hp then id go with a turbo along the lines of a 30r. What fuel are you using? On high compression and on pump gas(93oct) you could start off at 12psi and see what kinda power your making on that to get a baseline. You cant run too much boost on high compression on pump gas BUT if you run e85 or some alternative fuel to keep cyl. temps low you can really boost up that high comp. motor

Originally posted by Gruff511
What are you tuning with? MS? if your only looking for 300hp then id go with a turbo along the lines of a 30r. What fuel are you using? On high compression and on pump gas(93oct) you could start off at 12psi and see what kinda power your making on that to get a baseline. You cant run too much boost on high compression on pump gas BUT if you run e85 or some alternative fuel to keep cyl. temps low you can really boost up that high comp. motor

currently running 91 we dont have 93 where im at just 95 and race gas but we have e85 which i think ill be wanting to go that way. and ms is a must for sure, right now i have an afx ecu. i have looked at about 4 different turbos that could work but still not sure lol. hx35 but i think it might be to big, s25g, sc6052E or similair and a hy35 twin scroll.

there are probably a few turbos that suit your needs...


what are the overall goals of your car?

Drag/autox/dynoqueen?

I do know however you said its a DD so I would assume you would want something that would spool realitively quick.

with my limited knowledge I would suggest a 16g, quick spool and can get you to 300 with a little room to grow.

id look into a small T3/T4 setup. Something with like a .48 or .53 AR it will spool fast and you can pull 300hp out if it but like was mentioned it depends on what your overall plan is with the car. I Have a t3/t4 setup with a .63 and it will make 400 with the right fueling but it was a little laggy but I liked it cause the car was moving by the time it built boost which hhelps with traction issues

Originally posted by Socal420aT
id look into a small T3/T4 setup. Something with like a .48 or .53 AR it will spool fast and you can pull 300hp out if it but like was mentioned it depends on what your overall plan is with the car. I Have a t3/t4 setup with a .63 and it will make 400 with the right fueling but it was a little laggy but I liked it cause the car was moving by the time it built boost which hhelps with traction issues

my egt's would be way to high if a ran a .48 or .53 i think. the way my n/a is set up right now my powerband dont hit till 4k so i dont care for super quick spool but i dont want it too laggy. i know using a s25g with 10.5 comp crane 12's 1000cc on e85 will get me close to 400hp but i dont know if i want to get a hahn turbo kit. i think a custom kit would be better for me. just stuck on choosing the turbo and housing.

Custom kit would be better. So your power goal is 400? If your going e85 you can make 400 with a turbo little smaller then the s25g.

Originally posted by Gruff511
Custom kit would be better. So your power goal is 400? If your going e85 you can make 400 with a turbo little smaller then the s25g.

yeah im really leaning towards the gt3071r .63 with tdo4e housing. my first power goal was just 300-400hp so any where in there will be good for me. i still want some traction lol i think anything over that wont stay to the ground. its not a drag car just a dd that i might hit the track with every now and then. i have only found like 2 good brand intercoolers but im not sure what is best? like a 12:1 or what, i heard j piping is a joke but a lot of people use it. is there any long route piping for the 420a or do you have to peice it together?

this site is pretty dead it seems like? im surprised since there is alot of good info here.

I've been very happy with my GT3071 w/ 0.78 twin scroll exhaust housing. It spools fast enough for me with just 8.8:1 compression. It is noticeably slower and more linear than the previous S16G. Boost is readily available if I keep the RPM above 3000. That works well as a DD because you can keep up with traffic and never break vacuum. You'll save some money in gas and won't be obnoxious with constant BOV venting. The power is there when you need it and hides when you don't. I would certainly tread carefully with 10.5:1 and 91 octane. I'm assuming that you will have control over ignition timing as the AFX should have advanced the ignition to a level which will be scary with boost. If you are going to stay with 10.5:1 and 91 octane, I would go with an MS with fuel and ignition control as soon as possible. You won't have the luxury of being sloppy with the tuning. Then, you'll find traction to be the next major hurdle.


Corbin
'95 ESI-T

Now with more power and fewer leaks



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