How do you find cc volume for heads?
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From: Mason TX
How do you find cc volume for heads?
Would anyone have a link, or maybe be able to descibe to me how you can measure the cc volume in the chamber of a cylinder head? I have a set of aluminum big block heads I bought from a friend. They started out as 115cc open chambers, but my friend said they have been milled quite a bit. He couldn't remember what they are now. Id like to know so I can figure up compression ratio for my engine. Thanks for the help!
Le Mans Master
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You need something like this. http://www.summitracing.com/parts/SUM-911581
You place the fluid in a measured buret. Then you use the plexiglass peice with some grease on it to seal off the chamber. then you let the fluid flow in until it fills up the chamber. At that point you measure the fluid that was used to fill it and that is the head cc. You can build something similiar by buying some plexi and getting a buret and stand.
You place the fluid in a measured buret. Then you use the plexiglass peice with some grease on it to seal off the chamber. then you let the fluid flow in until it fills up the chamber. At that point you measure the fluid that was used to fill it and that is the head cc. You can build something similiar by buying some plexi and getting a buret and stand.
Melting Slicks
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I was watching a show a few days ago, believe on the Science Channel but not sure, where a NASCAR engine was being built. Really cool. In order to qualify the engine, they have to measure the CC of every cylinder as described above.
Le Mans Master
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From: Livonia MI
Don't have a link, but done this a few time's. Lay the head's on their backside with a spark plug installed. Lay a piece of clear plexiglass over a chamber with a hole drilled in it, sealed with Vasoline. Pour in liquid(usually alcohol w/dye) from a measured container such as a lab graduated cylinder or buret until flush with glass bottom. Pretty much about it.
Pro
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From: Old Bridge, NJ
Don't have a link, but done this a few time's. Lay the head's on their backside with a spark plug installed. Lay a piece of clear plexiglass over a chamber with a hole drilled in it, sealed with Vasoline. Pour in liquid(usually alcohol w/dye) from a measured container such as a lab graduated cylinder or buret until flush with glass bottom. Pretty much about it.
Le Mans Master
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Le Mans Master
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Melting Slicks
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From: Salmon Arm, BC
For an inexpensive measuring tool get youself one of these
http://www.google.ca/imgres?imgurl=h...w=1020&bih=640
http://www.google.ca/imgres?imgurl=h...w=1020&bih=640
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From: Mason TX
For an inexpensive measuring tool get youself one of these
http://www.google.ca/imgres?imgurl=h...w=1020&bih=640
http://www.google.ca/imgres?imgurl=h...w=1020&bih=640
Team Owner
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From: Redondo Beach, California
If you're going to be precise with your aluminum cylinder heads, should you consider polishing the domes? I have some Brodix aluminum BB heads (Big Brody) and not only with the rough sandcasting dome texture, there's a little flange between the intake and exhaust valve. Seems that to do the best job, you want to polish the heads and then balance them.
My apologies if my response is a little variant from the how to measure head volume.
My apologies if my response is a little variant from the how to measure head volume.
Drifting
Joined: Sep 2010
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From: Laguna Niguel California
When you are calculating compression ratio, don't forget to add the compressed head gasket volume and the recess depth of the piston down in the bore. A lot of guys forget this and wind up getting less compression than they think they have. You also have to add or subtract any pop-up or recess in the piston dome.
-Good Luck.
-Good Luck.
Melting Slicks
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From: Kingston Ontario
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From: Mason TX
That what I was thinking too! My friend I bought these from told me these were milled way down, almost to where it had a smaller chamber than a closed chamber..
So unless I did this wrong, this seems off to me...
So unless I did this wrong, this seems off to me...
Le Mans Master
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From: Was New Orleans but swam to Baton Rouge LA
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What work did they have done to them? It is a chance they were not milled properly and if the chambers were ported heavily they could have just add cc's instead of taking away.