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rotorwrench · 08-31-2019, 07:19 PM

It's difficult to realize that high a compression ratio on any of the flathead designs let alone the Model T types. The OHV head was the most common way back in the day.

If you shave the head, there still has to be valve clearance. If you have higher valve lift with a race cam, it just makes things worse. The amount of compression possible is finite.

08-31-2019, 07:19 PM	#9
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,436	Re: High compression head question It's difficult to realize that high a compression ratio on any of the flathead designs let alone the Model T types. The OHV head was the most common way back in the day. If you shave the head, there still has to be valve clearance. If you have higher valve lift with a race cam, it just makes things worse. The amount of compression possible is finite.