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- Carb sizing for a 390 - Ford Truck Enthusiasts Forums
Matching the carb "size" to the application is the key to getting the best combo of power and MPG Rear gear ratio dictates the cruise RPM, carb CFM rating dicatates the size of the venturi bores, and both of these have a direct impact on the velocity at cruise RPM
- 68 GT390 Correct carb? - Vintage Mustang Forums
I'm restoring a '68 GT390 Fastback 4-speed manual Engine is original 390 4V but exhaust headers are aftermarket and I think it may be the wrong carb which is a Carter AFB A0 9625 SA A bit of research suggests this is a 625cfm carb and that the number 625 relates to Chevy applications
- Carburetor recommendations for the 390 engine? | Ford Muscle . . .
I checked the numbers on the carb and it's a 1 08 venturi 4V 480 CFM for a 289engine Also the gas line fitting threads to the carb has been buggered up from previous owners, drilled out and tapped to larger size stripped then retapped
- What Size Carburetor The Ford 390 Needs - Junkyard Mob
The size of carburetor that the Ford 390 needs are either a 2bbl or 4 bbl unit producing between 600 - 650 CFM There is a large quantity of aftermarket support for rebuilding these engines, so parts are plentiful, but they can be expensive
- Another 390 Carb size recommendation - 332-428 Ford FE Engine . . .
You’ll have better tuning options with a dual metering block carb, since it will allow the secondary or rear jets to be changed This is more relevant to higher rpm or top end performance The correct factory approx 600cfm Holley will have those blocks A 3310-1 will also have them
- Factory Carb for a 390 - Ford Mustang Forum
What size carb normally came on a 67 390 block? 600CFM 4 barrel? We may need more information, like either what kind of 390 Hipo, 2B or 4B type (i know you said 4B but that doesn't mean the engine was originally a 4B), etc
- 390, what carb should i use | The H. A. M. B. - The Jalopy Journal
Since a 390 is almost 400, 2X 400 is 800 so less than 800 cfm is the most your engine could use There is also engine efficiency, rpm, etc , but that is a simple way to calculate carburetion
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