Turbotodger

Hi all I'm new to all this and had a question for anyone who has the answer I have just got a s2 RS turbo and was wondering if I took off the dump valve if it would chatter and if so would it chatter at the same rpm as when it dumped and would tacking off the dump valve affect performance thanks in advance.

bigkevin

taking the dumpvalve will not affect performance bhp wise and the chatter is not loud at all bearly hear it on mine

Turbotodger

Thanks bigkevin do you no what makes the chatter louder it's just my mates got a fiesta turbo and that chatters nicely.

mgtkr1

the fiesta has the cone filter directly on the end of the comp housing whereas the escort (assuming its still on mfi) has the metering head between the turbo and the filter which deadens the compressor stall (the sound you know as chatter). the t3 turbo doesnt need a dv as its a robust unit besides, mfi works better without one. you can get airleak issues with mfi, esp if the correct dv26 (twin piston) dump valve is used. i get the chatter sound loud and clear at 15psi.

Turbotodger

Thanks that explains it. You said you got chatter at 15psi do you have a escort or fiesta and is that at the same rpm as a dump valve

Roscopeco

iTrader: (1)

You hear chatter on EFi cars alot louder which explains why the fiesta sounds louder than yours on mfi

cossirob

sorry to jump in on this but dose it matter if i put the dump valve imbetween the turbo and intercooler insted of after the intercooler on an efi turbo?