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This is what I found when I cc'ed my 2.8L heads (same thing is on 3.1 and 3.4 engines).
82-85cc intake ports [img]graemlins/burnout.gif[/img] !!
No wonder the carbid porting bits didn't fit into all the little places.
The exhaust ports are about 59-60cc's but there not shaped very well.
That isn't crap when compaired to the port cc to engine cu.in. ratio of SBC with vortec heads, LT1 and LS1.
3.9 port cc's per cu.in. for LT1 and SBC with vortec heads.
2.5 port cc's per cu.in. for my V6
It's safe to say I'm not done portiong like I though I was.
Several months ago I cc'ed the combustion chambers it cc'ed to 56-57cc's (though they were 55cc?).
82-85cc intake ports [img]graemlins/burnout.gif[/img] !!
No wonder the carbid porting bits didn't fit into all the little places.
The exhaust ports are about 59-60cc's but there not shaped very well.
That isn't crap when compaired to the port cc to engine cu.in. ratio of SBC with vortec heads, LT1 and LS1.
3.9 port cc's per cu.in. for LT1 and SBC with vortec heads.
2.5 port cc's per cu.in. for my V6
It's safe to say I'm not done portiong like I though I was.
Several months ago I cc'ed the combustion chambers it cc'ed to 56-57cc's (though they were 55cc?).
