I purchased a Z with "Stillen supercharged" stage 3. Apparently the previous owner had a smaller pulley to get more boost because of the altitude in Denver CO. My boost was 8lbs of psi. I ordered stage 4, only replaced the fuel pump, the box, and the injector. Consequently, I went to 6lbs of psi and I didn’t change the pulley, there is no leak any where. Does anybody know why that happened?

 

Belt slipping?

 

I don't think they are but I can check on them. Thank you

 

Is the fuel pump and inj's larger than before. IF so you could benefit by a Dyno tune..TOOOO rich??

 

Well!!! I installed the smaller injector back on and the psi went up to 9.

 

do u know what detination sounds like. u might wanna throw the bigger injectors back in and get ur car tuned cause u will pop your motor i ve seen golf ball size holes in blocks. do u have a/f gauge what does it read under boost.