ams replaced my hotside and exhaust manifold....thats the only time its been touched outside of me...

 

bump....help me please

 

Evo9's taper more so than the 8's.

 

yea, but its not normal to taper from 24psi to 12psi...

Thanks,
-Dan

 

do you have a downpipe? i have a stock catback, and it holds 19psi at red line. i will be adjusting my wg to see if it helps up top.

 

i have stock downpipe....u think thats it????

 

Boost pill removed?

 

12psi drop is excessive. That's actually lower than standard was gate...i believe it should be a min of 14psi. It might be your wastegate opening early and dumping boost. Might be a good time for a forge 9 wg. check your bov to.

 

^+1 Wastegate and bov. You can get an 18 psi gate for around $100

 

why?

 

why did you replace your hotside already?
call AMS since they are the one work on your car

 

Are you still on the stock intake? Do you hear a hissing noise?

 

yea im on stock intake, and when it drops to 11psi i hear a hissing noise like real clearly....

 

Is your intake snorkel firmly held down by the clips? If not, then there is a problem.

 

what intake snorkel???