6066 (1960-1966) GMC Truck Club

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6066 (1960-1966) GMC Truck Club (https://6066gmcclub.com/index.php)

- GMC V6 and V12 Engines (https://6066gmcclub.com/forumdisplay.php?f=9)

- - V-12 with blowers (https://6066gmcclub.com/showthread.php?t=49949)

bigblockv6

April 14th, 2017 04:09 AM

Re: V-12 with blowers

Quote:

Originally Posted by ilvracn (Post 66782)

i was wondering if 2 650 cfm carbs would be too much. with the lower rpm band of this engine. i was planning on turning 4000 to 5000 rpm max, depending on how much i can lighten up the rotating assembly.

I would run 2 Demon 500cfm carbs like Thunder V12 does, you may also want to contact them on how they do their build up on these engines:ok:

atomman

April 16th, 2017 07:01 PM

Re: V-12 with blowers

Demon carbs are no longer available.

ilvracn

April 17th, 2017 04:58 PM

Re: V-12 with blowers

Never liked demon carbs much anyway. I've had great luck with quickfuel and holley

TJ's GMC

April 18th, 2017 05:22 PM

Re: V-12 with blowers

I musta gotten the last 625 cfm road demon for my 292 as shortly after I am seeing they are gone. Plenty of demon carbs available though from Summit Racing. Best luck I have had has been with edelbrock thus far.

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