You can have two identical engines and have substantial HP and torque differences.Racebar wrote:Long time mye28 member. I've been away from posting here since about 2006. So this is a new account for me. I thought I would share a recent experience with Ireland. Im now part of a champcar team. We have two cars with m30b35 motors. We just installed ie headers and 292 reground cams. One cam is supposedly an ie 292 grind and the other is from a company in Europe. I can ask our team member if anyone wants to know who we got it from. So engine wise the cars both have stock m30b35's, cam, headers, and megasquirt. We spent an afternoon timing with Peter Florance and came up with 193 wheel hp for the ie cam, and 209 wheel hp for the other cam. Peak torque and hp was 300 rpm lower for the ie cam and the ie cam idles much smoother than the euro cam. Needless to say, I'm not impressed with the ie cam. If you account for 10- 15 hp for the headers and megasquirt, we are seeing a 0 hp increase for the ie cam. I'm not even sure yet the cam we installed is what we were told that we bought. My plan is to measure and report back to Jeff Ireland. I thought I was share this as a data point for those of you looking at cams. I'll post Dyno graphs here when I get them.
Do you have the specs on both cams? Comparing two different "292" cams means nothing without knowing their total lift, lobe offset, etc., and assuming two cams with a similar duration with everything else unknown will behave the same in two different engines is just silly.
"I'm not even sure yet the cam we installed is what we were told that we bought" sounds like you are making an insinuation that IE and or Jeff Ireland is guilty of wrongdoing or misrepresenting something. I don't know you, and have zero confidence in anything you've said so far. Welcome back!