Rb20 Boost Prob

[niz25t]

Hi guys

I got a r32 the other day and hooked up a bleed valve(i know its not such a good idea with stock turbo) but i did anyway this is what is happening >stock setup runs 0.8 bar all the time no worries.

> connect the bleed valve with it turned all the way off 1st gear boosts 1.0bar but when i change into 2nd it will run 0.8bar and so on . does this sound like a wastegate,actuator issue.

it seems quite strange it changes when its running through the boost tap

does anybody have any idea what mabey causing this ive tried 3 different controlers and pipes and they all do the same. this doesnt make any sense? any ideas

Edited January 26, 2008 by niz25t

[RB30-POWER]

if the car does not have a 3" exhaust and highflow cat (make sure its not blocked either) already look at that first.

fit an electronic boost controller to try and smooth out the boost curve.

if it still drops, it will either be from the standard turbine wheel not flowing enough gas to keep the compressor spinning hard enough at high engine rpm or it could be excessive back pressure in the turbine housing (small ar) forcing the wastegate open. (try larger wastegate actuator if you want)