Re: So let me get this straight.....
Iv'e checked mine and I can only speak from the 5-6 motors Ive tested this on over the last couple of years but in the ones Ive done the timing was all in by 1500-1800 RPM running with carb butterflies closed. Timing at full RPM was no different than running with carbs disconnected and throttle linkage fully advanced.
With the the Reeves method you are turning the motor over with the plugs out and wires grounded. Its a good method for getting a baseline with a new build but I never did like not knowing how much timing I was actually using when I started cutting the snot out of heads. 2-4 degrees is a huge spread with 32 CC heads on a 2.5 or 28 CC on a 2.0.
Then I started using a cut prop in a barrel which was loud as hell and made a huge mes to get high RPM advance numbers. I found I was getting the same numbers disconnecting the carbs and advancing the timing base to the stops with the motor running and it was a lot quieter and faster and less stressful.
Iv'e checked mine and I can only speak from the 5-6 motors Ive tested this on over the last couple of years but in the ones Ive done the timing was all in by 1500-1800 RPM running with carb butterflies closed. Timing at full RPM was no different than running with carbs disconnected and throttle linkage fully advanced.
With the the Reeves method you are turning the motor over with the plugs out and wires grounded. Its a good method for getting a baseline with a new build but I never did like not knowing how much timing I was actually using when I started cutting the snot out of heads. 2-4 degrees is a huge spread with 32 CC heads on a 2.5 or 28 CC on a 2.0.
Then I started using a cut prop in a barrel which was loud as hell and made a huge mes to get high RPM advance numbers. I found I was getting the same numbers disconnecting the carbs and advancing the timing base to the stops with the motor running and it was a lot quieter and faster and less stressful.
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