Charlie, if you have any input as to your experience or though as to why the switch to a cast iron head versus the E-head did not as we also predicted increased the restriction and the boost pressure.
I think the cam being bigger this time helped with the smaller runners. Where with the bigger runners and the smaller cam it was corked up . Which kept the boost level the same. I think your next test should be to simply put the E-heads back on with this new cam and see what happens..
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My Half AN Injun.....
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