Thanks for the reply Bob,
I have the early head. My head measures 3.462, which works out to 8.6 (I
assume the DPO skimmed the head at some point.) Would it make a difference in
figuring how much to mill the head if it is low vs. higher compression?
Wouldn't the end result be the same? I'm looking at the compression stats
@Richard Goods' web sight. He doesn't specify early vs. late head. I planned
to mill to 3.415. I haven't cc'd the chamber yet. I am concerned about my
math, because Richard Goods' chart says a head that measures 3.415 (compression
9.5:1) has a combustion volume of 45cc...Any ideas about the descrepancy?
Joe
RazorBobSr@aol.com wrote:
>I dont know what yr head u have but if its a low CR head these are the
>numbers u should be looking for,combustions chamber 49ccs,and head thickness
>AFTER
>milling to get 9.5[3.415] Highter than that will put u in the DET range for
>reg
>gas,I just did what u are thinking of and have eng set up much the same as
>yours.You can spend about @#$%^& dollers have eng ported,OR u can do it
>yourself
>as winter thing,unlesssss u are going for MAX HP??? Theres lots of iron that
>can be removed from intake ports with drill and some stones,then finnish with
>wheel cyl honning tool,use old ex valve as template.DO NOT make ports
>bigger,DO make them smoother,while u have head off and valves out,use drill
>and stones
>to open up intake valves pockets[under valves] and u could go to larger
>intake valves.Bob 74
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