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A7 & A10 Engine
A7 1946-1950
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A10'1956 (modifying compression ratio)
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Topic: A10'1956 (modifying compression ratio) (Read 7873 times)
muskrat
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Join Date: Jul 2009
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Lithgow NSW Oz
Re: A10'1956 (modifying compression ratio)
«
Reply #30 on:
08.04. 2021 21:32 »
G'day edboy.
Yes high comp with high top piston ans a hemi head are a problem.
We need to retard the ignition, richen the mixture or increase the octane of the fuel. In my case on the Cafe's 10.5:1 I have to do all 3 to eliminate pinging.
Cheers
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'51 A7 plunger, '57 A7SS racer now a A10CR, '78 XT500, '83 CB1100F, 88 HD FXST, 2000 CBR929RR ex Honda Australia Superbike .
Australia
Muskys Plunger A7
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The BSA A7-A10 Forum
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Technical (Descriptive Topic Titles - Stay on Topic)
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A7 & A10 Engine
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A10'1956 (modifying compression ratio)