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FE Power Forums => FE Technical Forum => Topic started by: 427LX on September 06, 2018, 08:15:35 PM

Title: Holley carb questions on the 9510 AC/AD...9510AH and 650 Holley.?
Post by: 427LX on September 06, 2018, 08:15:35 PM

Looking through my 1969 Ford Muscle Parts catalog  they list the 9510 AC/AD carbs as 652 CFM with a 1 5/16 and 1 3/8 sized venturi and 1 11/16 throttle bores. Also the 9510AH as 715 CFM using the same sized venturi and 1 11/16 throttle bores.

Is it the different type boosters altering the flow rate with all else being the same? 

And as a side note Holley listed the 650 CFM 4150 series carbs as using smaller 1 1/4 and 1 5/16  sized venturi using same large 1 11/16 throttle bores.

So would the typical Holley 650 carb give same performance as the 9510 AC/AD 652 carbs?

And where does the 715 CFM 9510 AH fit in the mix?

Title: Re: Holley carb questions on the 9510 AC/AD...9510AH and 650 Holley.?
Post by: gt350hr on September 07, 2018, 11:24:41 AM

   652's have "straight leg " boosters and 715's have "dog leg" or angled boosters. The booster changes the airflow through the venturi.