CC's
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Elder User
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From: Fort Rucker, AL
CC's
Anybody have a ballpark estimate of how many CC's a C6AE-R head is that is shaved .020?
Also, how many CC's is the dished piston head, stock? Is is 18 or 19.5?
Also, any words on deck clearance? Everything is stock.
Also, how many CC's is the dished piston head, stock? Is is 18 or 19.5?
Also, any words on deck clearance? Everything is stock.
Post Fiend
Joined: Jan 2003
Posts: 8,600
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From: Iowa
I just got done putting together my 390, and it has .012" deck clearance. It's a 390 with L2291 pistons. A stock truck 390 has .112" deck clearance, and a 360 has .104".
As for the head cc's, first figure out the area taken up by the combustion chamber. Then, take whatever volume .020" of the cylinder bore is, then multiply it by whatever percentage of the area the combustion chamber is. Example: Figure the combustion chamber takes up 2/3 of the area of the cylinder bore. .020" of a 4.050" bore is 4.22cc. So, if the combustion chamber takes half of that area, you reduced the combustion chamber volume by 2.81cc. So if you started with 74cc chambers, you'd be down to about 71cc.
As for the head cc's, first figure out the area taken up by the combustion chamber. Then, take whatever volume .020" of the cylinder bore is, then multiply it by whatever percentage of the area the combustion chamber is. Example: Figure the combustion chamber takes up 2/3 of the area of the cylinder bore. .020" of a 4.050" bore is 4.22cc. So, if the combustion chamber takes half of that area, you reduced the combustion chamber volume by 2.81cc. So if you started with 74cc chambers, you'd be down to about 71cc.
FE "Freakin Expensive"
Joined: Dec 2003
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From: Smith Mountain Lake, VA
A good rule of thumb for every .006" you mill the heads..you lose about 1cc in chamber volume... hence .020" off the heads would be about 3.3 ccs...
But the only tru way to CC a head is with a CC flask with a dripper attachment on it.. and square the head up..have a piece of Lexan cut a little bigger than the chamber...put a small hole in the lexan..then seal the lexan to the outside of the chamber with a thin coat of Vasiline...and slowly drip ATF from the CCed Vial to the chamber thru the hole in the lexan!!
That will tell you exactly what each chamber is at CC wise..So if you want to..you can match them all to the highest CCed chamber..
but this is generaly done on Race engine's...its alot of work for a street ride..but if your bored? what the hell, go for it..Or just Guessimate?
Russ
But the only tru way to CC a head is with a CC flask with a dripper attachment on it.. and square the head up..have a piece of Lexan cut a little bigger than the chamber...put a small hole in the lexan..then seal the lexan to the outside of the chamber with a thin coat of Vasiline...and slowly drip ATF from the CCed Vial to the chamber thru the hole in the lexan!!
That will tell you exactly what each chamber is at CC wise..So if you want to..you can match them all to the highest CCed chamber..
but this is generaly done on Race engine's...its alot of work for a street ride..but if your bored? what the hell, go for it..Or just Guessimate?
Russ
Last edited by RapidRuss; Nov 14, 2004 at 05:47 AM.
Post Fiend
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From: Iowa
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From: Fort Rucker, AL
Originally Posted by rusty70f100
What's the diameter of the dish and how deep is it?
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