slow spooling turbo

[silvermitsu10]

Ok guys. I bought a 95 GST not to long ago and I just went to north carolina this past weekend to pick it up. I got it home fine and got all the boost leaks and what not fixed. The car had been sitting very near a beach untouched for over a year in storage so of course all of the couplers to the intercooler were dry rotted and boost leaks were massive and very easy to find. I replaced every single coupler there. Now the car has a Tubular Manifold Hard pipes to the stock intercooler Full 3 inch exhaust from the turbo back, and an injen intake. All in all it pulls hard but it is running the stock turbo and I have an ecu+ that I got from a buddy of mine that I used to tune out a hard fuel cut at 4500 RPM under Partial throttle to full throtle. It is running a little rich because my boost guage and AFR guage haven't gotten here yet... jbut they are on the way. My queston is shouldn't the stock T25 be spooling a little faster than2800 rpm? And it only spools there if I hit WOT, if I keep it steady at a hard acceleration sometimes it won't spool untill about 3200 or so. Any ideas? Now this is the orginal turbo on the car as far as I know and it does have 154,000 miles on it, and there is a little shaft play but it is very minimal. Any help is much appreciated.

 

[diddy456]

That is about normal spool time and actually pretty good. How early are you wanting it to spool? Bigger turbos are going to take longer to spool, so I'd be happy with 2800.

 

[silvermitsu10]

no. That doesn't bother me... I actually like it that way because I can hook up pretty decentlywith about 22 psi in the front tires. A friend of mine who has gone through a few different turbos on his before putting a piston through the block said that is seemed a little slow. I wasn't planning on getting anything that spooled any quicker if this one was ruined. If anything I would add just a tiny bit more lag with a good bit more up top. Thanks

 

[billnolan18]

hold on....you're pushing 22psi on the stock t25? is that what you are saying b/c i'm confused. if you are that t25 isn't going to last long...plus i bet the boost drops to like 12psi by redline

 

[LambdaJoker]

I can hook up pretty decentlywith about 22 psi in the front tires.

no hes talking about the pressure in his tires. you know, lowering tire pressure gives you a little better traction on some tires.

 

[daren_p]

You don't have your profile filled out (hint, hint, fill out your profile so people can give you better advice) but sounds like your probably still running the stock exhaust? If so the stock exhaust is a big restriction & the turbo will spool slower vs someone with a nice aftermarket, free flowing exhaust. For a stock exhaust I'd say that probably sounds about right for spool time, since you did mention the car/turbo has 154K on it as well.

 

[silvermitsu10]

yea... sorry about that. I'll fill it all out after work. but no it has some kind of tubular manifold... Not one from ebay, this one looks much different from the OBX ones. And from the turbo back it has full 3 inches with no cat. An apexi world sport cat back is whats used but it does have some kind of after market o2 and downpipe as well.