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Bruce Lancaster · 08-02-2010, 03:55 PM

Kloth's was unusually small in displacement for highly developed flatheads. This raises interesting questions about the nature of gains with big engines...
A big flathead can run more transfer area without excess loss of compression, but ports are stuck with the same limits and probably become the overall control to peak power possible.
Torque band should run higher/fatter in a big engine, good on street or broad-range racing...
But...is it fair to assume that at high end, fundamental port limits are going to set peak HP at about the same on big and small engines??

08-02-2010, 03:55 PM	#83
Bruce Lancaster Member Emeritus Join Date: May 2010 Location: Madison, NJ Posts: 5,230	Re: Boring a flathead Kloth's was unusually small in displacement for highly developed flatheads. This raises interesting questions about the nature of gains with big engines... A big flathead can run more transfer area without excess loss of compression, but ports are stuck with the same limits and probably become the overall control to peak power possible. Torque band should run higher/fatter in a big engine, good on street or broad-range racing... But...is it fair to assume that at high end, fundamental port limits are going to set peak HP at about the same on big and small engines??