ok i decided to take my vh with rb30et to work today drove to work mint leaving work hit boost and it makes a squeling sound almost sounds like its coming out of the rear but got out and checked it boost controller or and lines were off and nothing any ideas its running 100mm fmic turbosmart manual boost controller and there is no bov

Exhaust leak/boost leak?

sounds bad, you should sell me it, haha nah man ive always wanted a vh with a 30 in it, throw some pics up

checked boost lnes and nothing and checked intercooling pipe work couldnt see anything

compressor wheel might be touching housing, any play in the turbo? ie back forward, side to side? if it is then sorry to be the bearer of bad news!

check the nuts are tight were the turbo bolts to the exhaust manifold

standard vl turbos are prone to cracking the exhaust housing so when the heat up the will touch the wheel might pay to look at the turbo

was told its not a stock turbo but will have a look does anyone know where the std factory rb30 bov's normally are i cant find anything on this set up will post pic soon

Do you still have the stock crossover pipe? If so the overboost vavle is proberly still active. Have it welded up or have it replaced with a bung.

will post a pik of rb no x over pipe

Quote: Originally Posted by lowlyf [View Post] will post a pik of rb no x over pipe On the throttle body side of your intake manifold is where the factory over boost valve is usually residing on the right hand side most people usually bung it up