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[T3] Semi Hemi cutting FI heads
Hey guys, does anyone have any firsthand info regarding the use of semi-hemi
cut heads on a fuel injected engine? I know the "Book of Berg" says it's a
no-no, and after talking to Clyde yesterday they don't seem to have changed
that stance. I'm rebuilding my square's engine and there are so few options
regarding new heads out there. I found a pretty nice pair for a reasonable
price and the shop I bought them from doesn't recall ever having problem with
the combo of FI and Semi-Hemi.
My next question is about compression ratio. If I do try to run those
heads, what kind of CR should I run? From what I hear, the FI will help the
engine tolerate and extra few points, but what would work best? I usually run
6.9 or less on my type I's but the FI is a new twist. Right now I've got .040
deck and 54cc chambers which works out to 7.6:1.
Is that too high to be able to run on regular unleaded ? I would rather
invest a little $$ on shims or spacers than have no fuel options. Thanks for
any input you may have.....
Robert K
65 1500s
67 Sunroof B*g
69 Squareback FI AT
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