Posted By: DARTH V8Я
Holley Carb ID w/o Choke Horn - 07/10/16 01:26 AM
Going to look look at a Holley tomorrow, but it has a milled off choke horn, hence no list. Is there a easy way to ID say a 650, 700, 750, 800 cfm carbs?
THanks.
Posted By: GomangoCuda
Re: Holley Carb ID w/o Choke Horn - 07/10/16 05:11 AM
Take calipers with you and measure the throttle plate bores.
Posted By: DARTH V8Я
Re: Holley Carb ID w/o Choke Horn - 07/10/16 05:27 AM
Thanks for the reply, but I'm almost positive that 650-800 cfm Holley's use the same 1-11/16 throttle bore diameter.
Posted By: GomangoCuda
Re: Holley Carb ID w/o Choke Horn - 07/10/16 12:30 PM
Sorry. Brainfart. Do the best you can to measure venturi.
Posted By: 62maxwgn
Re: Holley Carb ID w/o Choke Horn - 07/10/16 04:17 PM
Are you sure it was milled off ? The old 3916 and 4640 three barrels had no air horn as did a few others,the list number was stamped on the top of the casting.
Posted By: DARTH V8Я
Re: Holley Carb ID w/o Choke Horn - 07/10/16 04:26 PM
Going by what the seller said, yeah it was milled (most likely cut) off.
Posted By: John_Kunkel
Re: Holley Carb ID w/o Choke Horn - 07/10/16 08:11 PM
There's a raised casting number on the driver side upper forward corner of the main body, right below the air cleaner flange.
Some of the ones I know are:
P-32 is an 850 CFM
P-11 is a 700
P-36 is a 780
P-80 is a 750
Post the number here and others might be able to cross that casting number to a LIST number.
Posted By: DARTH V8Я
Re: Holley Carb ID w/o Choke Horn - 07/10/16 11:30 PM
Dude bailed on me today.. this week sometime he said. Anyways he threw out some #'s:
rear metering block: 7003 33101
front metering block 5271 33101
he didn't give me P-xx #'s.
Thanks for the info
Posted By: John_Kunkel
Re: Holley Carb ID w/o Choke Horn - 07/11/16 06:23 PM
Dude bailed on me today.. this week sometime he said. Anyways he threw out some #'s:
rear metering block: 7003 33101
front metering block 5271 33101
Those are for a LIST #3310...750 or 780 CFM vacuum secondary depending on the dash number.