Holy crap guys..
I have ALWAYS had a bad hissing from my engine.. for 5 months now.. LoL..
I have the P.Allnet fuel rail, and 440cc injectors... and I NEVER had o-rings from the injectors to the intake manifold... so it always HISSSSEED.
even with the throttle 100% closed it idled at 1,200 RPM and it never held boost at a solid spot.. it would fade off.... when the boost came on it was slow, then pushed you back, then faded...
NOW.. holy crap... I put on thick rubber o-rings and DAMN! no more hissing, RPM down to 650, the engine runs smoother, quieter and harder!!
I never ever ever exagerrate anything.. look back at any of my posts... with the power my car has I was thinking around 210rwHP at 9psi... even with all my mods..
BUT now... holy crap... it's UNBELIEVABLE! the boost is instantaneous... it pulls soo much harder.. and it's at least a 20% gain..
I had NOO idea a vacuum leak would do this... NO idea