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06-14-2005 09:33 PM #1
I have been browsing different makers or Aluminum heads (just looking at differences), but there are some options that I am not familiar; (correct me if i'm wrong) I believe the cc's like 180cc or 210cc is intake flow ...correct,
Not correct. This is the intake port volume, not the flow figure in cfm.
There is another smaller cc to designate volume and the smaller you have the higher compression (factoring in piston dome/dish) Correct so far?
correct. this is the combustion chamber volume in cc's (64, 72, 76, etc.)
One thing I have been curious is the degree that is mentioned...I have seen 12 degree heads, and 23 and 24 degree heads Where does this angle come from and what does going one way vs the other give you? I'm familiar with different angle valve seats but I don't think these are the same descriptions.
This is the valve angle in the head as it relates to the block deck surface. As the valve angle decreases, you must pay more attention to valve-piston clearance.
http://www.hotrod.com/techarticles/48778/PLANET EARTH, INSANE ASYLUM FOR THE UNIVERSE.






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