Me and a friend has been working on getting his car running good, but cannot figure out the problem? forged 383, afr 210 lt4 heads, minor ported lt4 intake, 58mm tb, 30lb injectors, 3200 stall, roller rockers, 12.0 compression, 4.11's, 468 comp cams cam, pcm4less tune.. Air/Fuel is good according the the FAST dual wideband.. But the car runs a consistant 12.30 @111? 1.69-1.72 60ft.. Been fighting with this for awhile, and cannot get it to run anybetter?

 

any knock? need more information. that car should be running a good deal faster IMO.

 

Well the car were talking about is mine and theres no knock when i run it but theres knock detected at idle at start up. the wide band stays at about 12.5 when i get on it at the track. I just dont understand why it doesnt run better then it does. I had bryan from pcm for less do the mail order tune. and since then i have gotten the lt1 edit but no luck.

 

that sucks man, im sorry to hear that. Ive always been wanting to see results from the XFI cams.