I just had a discussion with someone who has a XR2i efi. He has had the head ported and a Kent cams CVH32 fitted and it was dynoed at 140hp. I had the CVH32 too when I had my Orion N/A, and I can't really fault it. On the other hand, remember that what ever you will gain high up in the rev range, you WILL lose lower down. Therefore I am not personally a big fan of hot cams.