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911pcars 911pcars is offline
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Join Date: Jul 2000
Location: So. Calif.
Posts: 18,278
Well, you could, but it'd be messy. You would have to measure the combustion chamber volume with a cylinder at TDC. Poised with that figure, you can plug in stroke and cylinder volume (if known) and arrive at a pretty close number.

The problem is how to measure CC volume. You would have to fill the cylinder with some liquid through the spark plug opening w/valves closed and make sure all the air is vented for an accurate reading. Doing this in the car is difficult, if not impossible. You'd have a better chance with the engine on a stand.

I'm sure the NASCAR tech guys have a rig to do this conveniently (i.e. fill test cylinder at BDC with test liquid. Measure fluid in, then rotate engine to TDC and measure exiting fluid into graduated beaker. The difference is CC volume, or something like that). Their cylinders are a little more vertical than ours. Any stock car tech guys out there?

Old 07-31-2005, 01:26 PM
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