I've been playing with my labtop and using freescan and I noticed my MAP sensor is reading really high (~65-70 kPa). I've checked for leaks and even adjusted the valves with no luck. I was wondering if this cam has so much overlap, that it causes the manifold pressure to not be where it should be. Does anyone else have this problem? BTW, I have the Jolt-2 cam, which is similar in size to the gm847.

 

I never had any issues, but it was dyno tuned by Bryan at PCMforless.com...My cam is also smaller than yours, I think....I'll pm you the specs...Give Joe a shout, he's back in the game...

--Alan