Are your current pistons notched? I might look into the AFR's over the TFS heads, since the valves on the Twist Wedge heads will be canted and may not line up with the notches in the pistons. The X303 is a pretty radical cam, so the only way to know for certain would be to test fit the heads with it.
Just curious, but have you actually ran this engine yet? Seems to me that E6 heads and an X303 cam might have piston to valve issues as it is?
62cc's shoud put your around stock compression if I'm not mistaken. If you're going to keep this engine N/A, I might consider going with the 58cc versions just for a little more "crunch". A little added compression will keep throttle response crisp and help things on the low and mid ranges of the power band.
Truth be told, I'm not a fan of the alphabet cams either, but I realize you're on a budget here and those heads need addressing a lot worse than the cam does.
I think you're probably being way generous (about 40-50hp) in your estimates. Remember, he's still pushing this all through stock iron heads....and a set of non-HO E6 castings on top of that. Ported or not, he can have all the suporting parts in the world, but with a cork like that in the system, he's never going to break 300hp in N/A form.
Dude I had an X303 with Performer RPM heads and 10.5:1 compression bump. I had to have mine flycut at the machine shop, dropping me to 10:1 comp. Your going to have issues wit hthe rockers and cam wit hstock pistons. Sell that thing and get a TFS Stage 1 cam.
what kinda issues do you mean.... gimme a little more detail.... its hard for me to take advise without knowing why its being given..... and "your going to have issues" doesn't really tell me anything.
also, you think I'll be able to break into the 300hp range?
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