Hi there

im going turbo pretty soon, about 4-5 psi until I upgrade fuel mods to run 8 psi with stock internals on an auto 2200......

I whant my car to be "stock" until I push the gas pedal, so everyone can be surpriced lol... thats why Im going with the Cut off activated by boost...

http://www.atpturbo.com/root/releases/release091004.htm

alright, my question is:

when the cut off opends , the exhaust will flow in the cuttoff and in my stock exaust ? I believe so.... and I was just curious If I need an 02 simulator eeven though I will have a cat ? Since i am adding more air/fuel to this engine, maybe my computer will think that there is something wrong with my car ? and the check engine light will be on ?


I though maybe I could do like 2 cutt-off valves in the exhaust, one ain the 3" downpipe to take the air off, and another valve after the cuttof to close my current stock exhaust while the boost cutt off valve is open ?

but then, thats gona get more expensive than buying an exhaust......

put it on after the cat, no need for an O2 simulator at that point i would think.

now cuz then I will need to update for a 3" cat

im gona run a 3" downpipe and 3" Y that is gona connect to stock exhaust and the Cutt Off Valve

should be fine after the cat or just get a o2 sim to end the worry


saturn 5speed turbo 8psi
93' z24 grand prix turbo 3.1 swap, crane 272 cam, 3100 hybrid top end swap, t04b turbo