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JWL · 11-12-2021, 05:28 PM

First, we must be clear on whether this is blow-thru, or not? Probably not, but it makes a difference. The ideal size 4 barrel carb for a small street Flathead is the 465 CFM Holley. This is especially true where good usable low speed torque RPM is desired while maintaining good top RPM HP. But, even more important than specific CFM sizing, is the requirement for jet sizing to be safe. I suggest a good A/F ratio meter so you can start somewhere in the 11 to 12 area while seeking the ultimate for your combination. The ignition combination will be a consideration to make the best use of the new blower.

11-12-2021, 05:28 PM	#3
JWL Member Emeritus Join Date: May 2010 Location: Fitzgerald, Georgia Posts: 2,204	Re: supercharger carb info needed First, we must be clear on whether this is blow-thru, or not? Probably not, but it makes a difference. The ideal size 4 barrel carb for a small street Flathead is the 465 CFM Holley. This is especially true where good usable low speed torque RPM is desired while maintaining good top RPM HP. But, even more important than specific CFM sizing, is the requirement for jet sizing to be safe. I suggest a good A/F ratio meter so you can start somewhere in the 11 to 12 area while seeking the ultimate for your combination. The ignition combination will be a consideration to make the best use of the new blower.