There is a lot of talk about cc'ing engines. I don't see anyway that is reasonable to do during the race weekend. I am pretty experienced at wrenching on these cars, and I don't think I could get reliable cc numbers at the track. The environment is just not conducive to that detailed a procedure. If the engine needs to be cc'd its likely going to have to get boxed up and sent off.
It seems as if everyone is in agreement that if the cylinders are whistled with the valve cover off, we are going to get reliable numbers that are very close to the cc numbers. It seems that a simple SM specific procedure change can stop the issues we are seeing with building to the test and not the spec.
We can get closer but its still another test that can be beat...its being beat now. With the head on the car its very hard to get accurate bore and stroke. The whistler can be beat with both bore and stroke (and a few other ways)....
Some found ways to beat the whistler with the valve cover on....others have found different ways and pass with the valve cover off... The whistler while an incredibly accurate tool when all the variables are know its far to easy to beat with the variables masked..