Quote:
Originally Posted by Steve C.
If that is a Butler cam he typically uses Comp Xtreme Energy lobes. If they are lobes 3317 & 3318 then your valve lift with a 1.65 ratio would be .594" / .618".
You might consider Comp QXI lobes listed on page 24 here:
https://www.compcams.com/lobe-catalog
They would raise your valve lift to 0.658" which would better take advantage of your cylinders heads. If these are Butler heads I suspect that 340 cfm number is at 0.700" lift. |
Yes, it’s the 3317/3318.
I thought the same in terms of being rated at 340cfm @ .700 & asked him why I wouldn’t take advantage of the port volume with more lift. He simply said they’ve done a lot of testing and this was what he recommended.
I agree I could pick up a lot with the one you’re talking about, but would it be streetable?
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