just put my z6 vtec head on my b7 and it feels no faster at all than the b7. is there somethings i can adjust for it to run better?. no cels and i cant hear the vtec, i know its a weak crossover but i figured i would hear something. oil plug was removed and it was all wired. it feels like it boggs when i get on it and the idle is all messed up. but the whole throttle body with the FITV and IACV came off the b7 which idled fine. is there something else that would affect it that i should take off the b7?

 

cam timing correct?

 

Almost the same problem I had when my timing belt snapped on my stock z6 and bent a bunch of valves on the head. I swapped out the head for a another used z6 and it felt sluggish since then. Did a compression test and both #1 and #4 cylinders were low. Wasn't burning oil, no white smoke (antifreeze leaking into cylinders) and timing was perfect. Then it got stolen and blown to pieces before I could really diagnose it... LOL sucks!

Anyway, was VTEC wired up properly? Timing done correctly? You should also do a compression test and give it a good tune-up just in case.

 

yea i havnt gotten a chance to really take a good look at it. i will double check the timing and do the y8 plug and some new wires. maybe the new p28 ecu needs to recalibrate?

 

just to doubble check some things when timing it on my crank pulley the its marked like this..... 111 1 i put the 3 lines in the center and the timing mark on the cam lined up at the point of the marker or at the end of it? thanks

 

it was off a tooth. and i played around with the ignition timining a little and now its much better