Not really, that depends on more variables than just the cam.Originally Posted by Schwuppes
The XP needs 105s at a minimum. I think the reason most people get away with them is because install height in our cars is usually 1.78 with the retainers we use, not the rated 1.8. That makes the seat pressure a little higher.
To really handle the XP though, 130s are more desirable... especially on higher horsepower builds.
I used to think it didn't really matter... until I saw dyno graphs from various (and my own) setups, showing the 130s helped carry the power a little higher.
