by Ishiftem » Wed Dec 09, 2009 12:14 am
Assuming EVERYTHING except the bore is the same,your theory is wrong provega. The combustion area is the same. With the piston at TDC, and assuming the compression height is the same, the area that the fuel mixture is squeezed into is the same. Actually what you have done is lower the compression ratio. The smaller bore will pull in less air/fuel than the larger bore and squeezes that lesser amount into the same size space. My theory, and it's just a theory, is that you were not making optimal power due to detonation before. You don't have to hear it for it to be happening. The smaller bore effectively lowered the compression ratio, thus eliminating the detonation allowing the motor to make power to it's full potential. Assuming everything else about the motors is identical. Just a thought off the top of my head. It does make a guy think though.
Any one can restore a car but, it takes a real man to cut one up.