Big Black, thanks that really helps.

So how do I cc it? Do I fill the space with oil then measure the amount in ccs?

 

Ward- Bob made some plexi glass plates and uses barets and all that cool stuff. You really need to be apart to figure it out.

 

Here you go.

Get a piece of plexi-glass and draw a circle in the center of it the same diameter as you bore then drill a small 1/8th inch hole close to the edge of the circle you just drew.

Now as far as the gasket you can get that cc from the gasket mfg.

for the head you need to have the valves installed and closed. Clean it up real good and take some axle greese and put a very thin film around the outer edge of the head.

now "stick the plexiglass that you prepared to the head and tilt a little so that the hole you drilled is at the top.

now get you a large syringe (spelling) that measures cc's and start injecting a colored liquid into the head through the little hole until full. This will tell you haow many cc's are in your head.

now you have 2 of the 4 measurements.

if you piston is "in the hole" then rotate your engine to TDC. Here is a key part of the next step so pay close attention to this.

Liquid will seep around through your rings while you are injecting it so after you are at TDC take the axle grees and run it all the way around the piston to seal it to the cylinder wall. Use as little greese as possible because to much could effect your measurment.

Now that you have done that smear another very thin film around the top of the cylinder and stick the plexiglass on it. Again fill it with the syringe recording how much you put in.

now you have 3 of the 4

lastly you have to get BDC measurement and you do it the same way as TDC but rotate the piston to BDC of course.

Then with all 4 numbers use the math I gave you in the other post.



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BigBlack- That is exactly what Bob does, he uses barrets instead of a syringe but that will work also.

 

One last way to do this on an assembled motor.

Get you a large glass or transparent cylinder that will hold many cc's of fluid, you need one with markings or you can mark it your self just be accurate. Get an old compression checker and remove the gauge. Now attach the hose to the cylinder with some sort of cut off valve.

Now using a liquid that is sorta thick fill the glass cylinder full and hang it somehow above the engine.

Rotate you engine to TDC


Remove the rockers and spark plug for the cylinder you are checking and attach the hose from the glass cylinder.


Now open valve to fill the engine cylinder and record how much went in.

rotate the engine to BDC and record your measurment and record how much more went in.

here is that formula

BDC+TDC
------------ = Compression
TDC

 

Has anybody used Trick Racing fuel?

 

THANK YOU Big Black! it will be done next week when I replace the base gasket!

So how many CC is a stock head? Anybody know, 14mins, RRC, anybody?