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 Single plane vs. dual plane carb calibration? 
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Joined: Wed Oct 23, 2013 8:01 am
Posts: 113
Have a carb set up to be good on a 385 ci. sb with a dual plane, carb will be going on a 421 with a single plane.
What changes if any will be required to the carb? Carb is a Qjet.


Wed Oct 07, 2015 8:10 am
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Joined: Fri Feb 08, 2013 5:50 pm
Posts: 2359
Very well may need some jetting or metering rod changes. Good time to invest in an O2 system.


Wed Oct 07, 2015 9:53 am
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Joined: Wed Oct 23, 2013 8:01 am
Posts: 113
Engine will be going on dyno in the near future, I just wanted to have an idea of what to expect.


Wed Oct 07, 2015 10:22 am
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