cmwalker

whats up guys, i just built a b18c1. i used an ls crank with p30's the head has been shaved and thin headgasket. I should be looking at just under 12:1 compression. I'm using s2p2 cams, +5+1 cam degree settings....

Now for the problem. The car hits a rev limit at what ever vtec is set at. If vtec is set to cross over at 5500 it will rev limit there, if its set to 6500 it will rev limit there. I've done a million test, the car can mechanically hit vtec, i engaged at 5k at a dead stop by connect 12v to the solenoid and watched the oil pressure gauge (hooked up to the 10mm port on front of head) go from 0psi to 70psi after the 12v was given to the solenoid. i have around the same oil pressure when hooked up to the oil pressure switch port.

I have put my hondata in another car and it pops vtec so the computer is ruled out. Ive traced my wiring and its all done 100% soldered everything, its all good. All the sensors are reading properly and my tuner says judging by the data logs and how smooth the curve is until vtec that all sensors are good.




We have now come to the conclusion that my cams are overkill for the build. the duration on the cam is ment for higher compression and the combo is not working, He was saying something about the overlap. He suggests trying a smaller cam. and im thinking the same.

I have a few data logs to share and my calibration also, if anyone is skilled enough to look through and make any suggestions. i also might be able to post a video of the "Rev Limit".

what do you guys think, any ideas from the more experienced guys out there.??

NODAKDCteg

I'd find it hard to believe that because the cam is too big it would not engage. Maybe the pro 3's would have that problem but the pro 2's are not that outrageous.
Quick question, are you positive that you have that rubber o-ring in the head? You need that for vtec to engage as well.

1998GsRIntegra

Are you using LS or GSR rods on that build? Please say LS rods. Your about 13.5:1 taking in to account shaving the head and the thinner head gasket if your on gsr rods.

Definitly not over cammed. Pro2's love 12:1.

Find a new tuner that knows what he's doing.

You've got some funky electrical issue going on if the car hits rev limiter where you set vtec. That is all computer related, you ruled out the ecu itself being the problem by testing in another car. That leaves wiring. Any CEL's? Good luck.