Thread: Help: Having trouble after header install

Originally Posted by Scottydoggs

your hitting the rev limiter in park. its normal.

and you loose boost psi with headers if you had 7 or 8 stock you'll have 5 now. the o2 wire would blow the fuse if it melted and then making the maf not work and could be why it was dogging up hill.

not trying to thread jack but why do you lose boost after headers? loss in back pressure or?

Originally Posted by gtpwannabe

not trying to thread jack but why do you lose boost after headers? loss in back pressure or?

Increased engine efficiency = less boost. That's why we pulley down in the SC world...to get back the boost we lost during increases in efficiency. We do NOT go to a smaller pulley just to increase from say 8psi to 14psi...because you really gain nothing from that other than KR with the SC.