how much power will i add?

[RS-RGS-T]

im boosting a daily 18psi on stock bored out t25 will i gain more power if i ad a bigger turbo and boost the same will it add power and if so how no matter what its still 18psi how does that work and what kind of turbo should i get my motor steal feels strong but i dont wanna exceed 21 psi because it has 117k on it. whats the best turbo for that if i dont wanna boost more than 21psi and at a good price 2?

 

[HyperGSX]

any turbo will produce more power at that boost level then the t25. What are your goals (1/4 time, whp)? Choose a turbo that will help you get there after you have decided those basic things.

 

[Staytuned]

Go to a 50 trim with some 660 injectors.

And yes you will make more power with a larger turbo at the same psi......it's called increased air flow. A t25 will only flow 23 lbs of air give or take a pound. A 50 trim will flow much more at 18 psi.

 

[vexixx]

Theres a guide on the dsmtuners http://www.dsmtuner.com/tuning-guide/2gturbo/
I'd say read that and get some sort of a basis of what you need to do to being the upgrade path of your car.

 

[dalatinromeo]

will i gain more power if i ad a bigger turbo and boost the same will it add power and if so how no matter what its still 18psi how does that work

Yes, more air flow.

what kind of turbo should i get my motor steal feels strong but i dont wanna exceed 21 psi because it has 117k on it. whats the best turbo for that if i dont wanna boost more than 21psi and at a good price 2?

I would suggest a an EVO3 16G or 50 trim. With all these vendors out there they are fairly priced nowadays.

Hope this helps a bit. Stay boostin