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Author Topic: A10'1956 (modifying compression ratio)  (Read 7840 times)

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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 .
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