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" Bridge - Point " CC Method with this method , no plate or grease is necessary , but cylinder head must be level to within .001". This method is best used while the cylinder head is being setup in milling machine . Just pop 2 valves in with light grease coating on seats, install spark plug, set Bridge-point level with machined surface, then slide Bridge-Point over center of combustion chamber. Start pouring CC fluid with medium steady stream. Very important that the stream is constant and not interrupted, also important that you keep the Burette end-tip as close to combustion chamber fluid as possible while pouring so as not to cause wave ripples. The very instant the fluid "jumps" to the point, close the Burette petcock. With practice and steady hands, CC's will come out .5 tenths or better accuracy, usually 1 / 2 CC's too large, so you get a safety cushion if your head must pass a legal requirement ! However, the most accurate CC method would be to use a plate with a light coat of grease and then CC chambers after you remove the cylinder head off the milling machine. The main advantage of the "Bridge-Point CC Method" is you don't have to chase the air bubble around with a moving plate , which is sometimes impossible if valve margins stick out above head / deck surfaces, and another advantage is the head is still in the mill if you want to mill more off cylinder heads.
The picture below shows the proper way to "zero" fluid level in the Burette .
The picture below shows the Teflon petcock and Burette stand .
The picture below shows a " Class A " Burette and fluid mark divisions .
The picture below shows a 250 CC Burette , perfect for measuring cylinder head port volumes .
The picture below shows an adjustable, rubberized Burette clamp .
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Copyright © 2004 MaxRace Software -
Meaux Racing Heads |
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