So from all the info I have read, a
TRUE or Factory XFI cam, not only has less lift and duration... but also has a built in 4 degree advance.
Also, I've read that the most recommended for our engines is 10 degrees of cam advance.
The XFI cam that I have might give me problems, but I'm going to try it anyways, and worst case I will just have to swap the factory cam back in until I find another XFI replacement
IF it doesn't pan out.
The ""XFI"" cam I received has no wear marks on it, and it came with some receipts from the grind place... but the grind is irregular... I measured it with my micrometer and the lobe height is less than XFI specs by over a thou... and it's not consistent... Cyl.1 Intake lift is less than Exhaust, Cyl. 2 both same lift, Cyl. 3 Exhaust lift is less than Intake...
This sounds like it's going to be interesting...
So I want to try it out 