Thread: carb sizing
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Old 12-20-2019, 08:08 PM   #8
Tom
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Join Date: Dec 1999
Location: Mesa AZ
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Re: carb sizing

The engine will use 600cfm. A 600cfm carb running 600cfm has to be creating some vaccum, which reduces power. A 750 is breathing easier at 600cfm hence the power increase.

OP- For a stock ht383, that won't be upper rpm, a 600cfm carb is plenty. So go with the 670 out of your two choices.
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