R32 Boost Drop

[reCOUPErator]

hey did a search and that answered some of my questions...

anyway got r32gtst fmic greddy front pipe and 3 inch exhaust with a adjustable wastegate actuator,

put a bleed valve in a while ago and it still wouldnt go over .7 ish bar, so i took the heat shield off and wound the threaded bar into the turbo end more, and went for a drive boost guauge says it go's upto .9 ish bar it holds there for a second or 2 and then it drops down to .7ish abar somethimes..

worked out in

first gear it only boosted to .5 - .6

second gear .6 - .9

and then drops off...

did i wind the actuator the right way....

the bleed valve dosent seem to be making any difference normal?

what could be wrong?

thanks

lee

[Amec]

have you disconnected the stock boost solenoid?

checked for a boost leak?

[reCOUPErator]

ok

im kinda a newbie kinda not!

lol

stock boost solenoid? is that located where the vac line enters for the stock boost guauge??

also that problem seems to have fixed itself slightly,

now it accelerates good but once it has spooled up the power seems 'flat'

could the injectors be maxing out or not getting enough fuel? has a walbro pump.. maybe needs new fuel pressure reg?

thanks

[nizmonut]

r32's dont have boost solenoids, only wastegate actuators and air bypass valves which are both vacum activated and both leak like a b*tch after a few years of being fitted to one of the worlds hottest running turbo engines.

anyway to answer your question....clamp the bypass valve hose and go for a drive, if it doesnt drop get a new air bypass valve, do the same to the wastegate actuator, go and look at a mates actuator, study the condition etc etc.

[reCOUPErator]

lol was wondering why i hadnt heared about a boost solenoid!

ummm wich is the bypass valve hose and the wastegate actuator is obviously the one the bleed valve is on.. between housing and wastegate actuator!

[reCOUPErator]

have decided will have a sus cos it seems to hunt between 500 and 1000 rpm on idle, see if there are any vac leaks etc!

then wind the boost back down till i can afford a re map and tune!