What is s15 t28 stock boost level?

[Silverbullet91]

Looks like my t25 is getting ready to check out and I trying to decide what turbo I want to replace it with. What is the stock boost on an s15 t28 and will it max out the 370's and mafs.

[virus77]

stock internal gate is ~7 psi, It will max out your setup at ~13 psi. Turbo is good for ~18psi

[Silverbullet91]

Thank you very much sir, just wanted to make sure that I wouldn't have to get some injectors, mafs, and tune just because I upgraded my turbo. I figured the s15's probably made a little more stock boost than that since they make about 250 hp in stock form. How much hp could I expect with an s15 turbo, redtop, greddy front mount, 3" dp and exhaust?

[virus77]

you are going to make the same power as you do with the stock t25 (~250) since your injectors and mafs is maxed out anyways. Basically to get the potential out of the new turbo you want you are going to need is injectors (480cc, 550cc) some type of fuel management (safc, rom tune, emanage, etc..) and a Z32 Mafs. With that setup you will be able to push around 300 whp.

[Dori Dori]

8~10psi is what you'll see w/ a s15 turbo on a fmic/3" SR.

[Silverbullet91]

Good, I just wanted to make sure the s15 turbo wasn't set at 14 psi or anything. I was happy with the power I had with T25 at 12 psi and I didn't want to have to upgrade my injectors and everything. Sounds like an s15 turbo would be a wise replacement. And if I ever want more power I can upgrade my fuel system/mafs system and crank up the boost. Thanks guys.
Modified by Silverbullet91 at 11:07 AM 2/16/2006