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PC/SR · 03-01-2014, 02:53 AM

gwhite: Weiand 7:1 head, carbs, cam, more speed stuff, no pressure oil except center main, babbitt bearings no problems. Personal redline is 4000 RPM. The limitation of the stock Model A babbitt engine is not compression but RPM.
Put on the HC head and enjoy. You will learn to use the timing lever as never before, and become a better driver because of it. Set initial timing in the normal manner. Play with timing to find your sweet spot. Advance and retard as you drive and learn how the engine responds. The engine is more responsive to timing adjustments. Half advance at full throttle for starters, more at cruise, full retard descending hills, for example. As you get used to using the timing you will start to keep your fingers on the lever and adjust it as you drive. It becomes kind of fun and part of the Model A experience.

03-01-2014, 02:53 AM	#11
PC/SR Senior Member Join Date: May 2010 Location: Santa Rosa, CA Posts: 1,285	Re: PROS and CONS of a high compression head gwhite: Weiand 7:1 head, carbs, cam, more speed stuff, no pressure oil except center main, babbitt bearings no problems. Personal redline is 4000 RPM. The limitation of the stock Model A babbitt engine is not compression but RPM. Put on the HC head and enjoy. You will learn to use the timing lever as never before, and become a better driver because of it. Set initial timing in the normal manner. Play with timing to find your sweet spot. Advance and retard as you drive and learn how the engine responds. The engine is more responsive to timing adjustments. Half advance at full throttle for starters, more at cruise, full retard descending hills, for example. As you get used to using the timing you will start to keep your fingers on the lever and adjust it as you drive. It becomes kind of fun and part of the Model A experience. Last edited by PC/SR; 03-01-2014 at 02:58 AM.