sry50

I have a vortech v1sc 6 pound charger on my 92 fox, it is installed correctly and it makes boost but not enough . It only runs 3 pounds of boost at full throttle, i tried numerous vacuum lines and gauges, they all read the same. Stock motor except for 65 mm throttle body and full exhaust. It should have way more power than it does i dont know what is wrong. My timing is set at 13 degrees and if i were running 6 pounds i would have blown a head gasket by now. Any troubleshooting greatly appreciated.

contentsunderpressur

Double check your clamps. Check the bypass valve too, they're bad about sticking.

PRO50SC

Do you have a way of reading your vacuum?

sry50

I have a boost gauge teed into the vacuum line for the fmu, i double checked with different vacuum gauge right to back of manifold, same reading. It almost never comes out of vaccuum to boost unless its full throttle and then only 2 to 3 pounds max. I thaught the power should always be there on a blower no matter what rpm. could the blower itself be hooped, brand new like 2 weeks old straight from vortech.

sry50

I dont think mine came with a bypass valve, its only a small basic blower

Sap

Sounds like a boost leak. Double check all hoses from the blower to the intake manifold and anything attached. Also what size pulley are you running?

E.

sry50

? the pulley that came with the kit, i think its something in my motor but i should still see at least 5 pounds come out of the blower

nanaki

no, the boost is not always there. the boost won't even kick in until about 3000rpm under WOT. even then, you're only going to be making about 3psi and won't make your max boost until about redline. what's your boost gauge read when you're at like 5200rpm?

luckythirteen13

+1

04mineralgreyGT

If all your seeing is 3 psi even at 5200 rpm check for belt slippage. That was my problem when I first installed my P1sc.