R32 Gtst Boost

[Boyracer98]

can any one help, fitted turbosmart manual boost controller to car adjusted boost to 10psi,runs fine then parked the car, did use it for a few days drove it and boost showed to be back at 7psi, on a new auto meter boost gauge, so popped bonnet turned up 2 clicks drove car put the foot down and felt like car was running well over 10psi but was still only reading about 7-8psi whats going on, the car has a r34 turbo? i think how much boost can i run safely its a stock rb20det with trust 3" ex, big trust intercooler, re mapped ecu new walbro 255 pump. thanks peter also have a high idle proplem and also car plays up once a while like its staving of fuel , i put it in nutral rev it then its fine? can any one help or tell me were to go in eastern sub of melbourne.

[045HOW]

get a new gauge. simple.

[lachlanw]

if the ecu is tuned for it you could run 18 psi

rb20det standard runs 10 psi . front mount plus exhaust will usually get it bout 13 . so run at least that .

was the ecu re mapped with a 34 turbo or the 20det one ?

and yeah get a real boost gauge . is it plumed up properly ?

[Boyracer98]

if the ecu is tuned for it you could run 18 psi

rb20det standard runs 10 psi . front mount plus exhaust will usually get it bout 13 . so run at least that .

was the ecu re mapped with a 34 turbo or the 20det one ?

and yeah get a real boost gauge . is it plumed up properly ?

its a brand new auto meter pro comp liquid filled boost gauge$180+ ( had them on ever car i have had, very good top quality), and the only vaccum i could find was the factory boost gauge line that runs to the small black box on the drivers side of the fire wall?

[DVS JEZ]

Check that the boost gauges line isnt kinked/squished or leaking anywhere.

[lachlanw]

oh k . mint boost gauge . im jelous . . yeah thats the best spot to get signal from .

have you checked your intercooler hoses arent leaking ?

[lachlanw]

just re read your post you said you connected your boost gauge to the hose for the factory gauge . did you join to that hose or run your boost line to the plenum? . that factory hose is well known for splitting and leaking at the plenum end check that

[Boyracer98]

sweet will check that hose, teed off the factory vaccum line.

[Boyracer98]

Check all hoses, no leak .what eles would cause this? am after a pic or diagram of where vacume[ hose go to!!!!!!!!!!! quote name=Boyracer98' timestamp='1313494590' post='5970056]

sweet will check that hose, teed off the factory vaccum line.

[Sarumatix]

definitely a vacuum leak somewhere.. would put money on it. Had similar symptoms, turned out to be a badly plumbed boost gauge.

[Boyracer98]

just checked boost gauge olive and hose to gauge, all good! , have checked all vacume hose no leaks!, unless there is more somewhere? am after a pic or a diagram of were the vacume hoses go of the manifold on a rb20det .

[RaceDat]

Hey, I was having same sorta problem on my rb25 (a few guys replied saying this is right for it) I apologize if i'm wrong