Quote:
Originally Posted by CooCaLi
Think I'm having a hp problem due to not enough fuel pressure on 14psi with big boost 3.4 kit. I have fuel it stage 2 fuel pump but stock hi pressure fuel pump.
Any one know how much stock hi pressure pump good for or do I need more tuning  |
HPFP is the limiting factor... the upgraded LPFP is doing nothing with stock HPFP. You should have upgraded HPFP first.