TNTramair

iTrader: (15)

ive asked a few people and cant really get a definative answer on this so all of a sudden i dont feel like a complete shmuck. basically im running dual 38mm Tial gates on my setup (twin turbo) which are pre-set to run 7.5psi total boost. i want to run 10psi of boost and would like to change my wastegate springs. now, do i change each spring with 5psi springs or a 10psi spring??? and i dont want to do it with a boost controller which i know i can do.

Fireball

iTrader: (21)

10psi since both gates will be opening based on a boost reference...that reference it boost pressure, not 1/2 boost pressure

TNTramair

iTrader: (15)

ok..so both gates will get a 10psi spring is what you're saying. thats what i figured but want to be sure. Thanx man!

Fireball

iTrader: (21)

think about it this way...if you put a 5# spring in both, the gates would open and bypass flow to the turbos at 5psi since both gates would get the same 5psi reference signal

speeddemon651

iTrader: (8)

yepp you just need to put the correct springs in.