listers,
 
i'm having fun trying to achieve smooth slight acceleration with twin 45s on my 2.3 L series. full throttle is good but it backfires through the carbs during slight accel and cruise. i'm thinking that the idle jets are too large and there is too much fuel.
 
i have 55F9 jets but have tried 50F6 - worse.
 
there is a aluminium spacer under the head (starting to leak oil)- achieving 9:1 comp now but over 10:1 without it.
 
any ideas ????
 
thanks in advance,
dunc.


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