[QUOTE=boothy;3856298]heres on for you, my mate has a series 1 with a chip, stage 3 turbo, standard intercooler and mongoose turbo back, he has a dump valve and is on mfi ,but it chatters why????


strange one that! maybe dump valve cant release enough preassure so the excess is goin to metering head? (maybe)

but it seems better with it off! so its stayin off! you get some really funny looks when it dumps people think your doin a million miles an hour..