First thing is that the ring set that you have is a standard tension ring pack like we would use in a nice street engine. Probably a 20 lb oil ring tension. That's too much for a race motor. To give you an idea of how light they should be, I use a tapered ring compressor to knock pistons in, and with low tension "racy" rings, you just barely have to put pressure on them with your thumbs and they fall in. You can upgrade the rings to a nicer set....I would do a very low tension oil ring, Napier second, and then run the vacuum pump. I'd say you have the potential of picking up 30-40 hp there.
On the cam, the duration is good and the lift matches the numbers on the heads, so you're good there, but if you were willing to experiment, I think there are some other lobes (although more aggressive) that could net a few ponies.
One last thing is the ICL...how's it hooking right now? It may be worth a shot to move the ICL up to around 106-108. It may make it a little softer on the hole shot, but it might help it pull stronger on the big end.
Without seeing how the car hooks or performs, it's a little harder to diagnose across a forum, but these are all points for brainstorming.
I think the ring pack and vac pump is a sure thing though...
B2 Motorsports, LLC
This message has been edited by blykins from IP address 126.96.36.199 on May 7, 2012 4:00 AM