305 V6 carb adjustments - The 1947 - Present Chevrolet & GMC Truck Message Board Network

JAKES 68GMC · 01-10-2006, 07:12 PM

Hello
What are the carb adjustments for a carburetor for a 305 GMC V6? Does it have a Stromberg carb or a Rochester? It is a two bbl, and most websites say it has some sort of stromberg carb. Can someone post the adjustments on for me? Thanks.
Jake

JAKES 68GMC · 01-10-2006, 09:53 PM

ttt

Longhorn Man · 01-11-2006, 12:15 AM

there are no set adjustments, you need to fine tune it

JAKES 68GMC · 01-11-2006, 08:07 AM

I was planning to just run it and tune it so it ran good. Have to figure out which screws are adjustments. I suppose it would help if I looked at it for more than 5 minutes at a time

TrainD5115 · 01-12-2006, 10:56 AM

If memory serves, there are two adjustment screws. The one on the driver's side for curb idle and one on the passenger side for fast idle (cold choke). You may also have a throttle solenoid that energizes if the air conditioning or defroster is in operation. I don't think that 2bbl carb had any mixture control screws.

jgrh64 · 01-14-2006, 08:59 PM

most of us have either switched to a holly 5200 2bbl or 4 bbl carb as most originals too small and worn out

JAKES 68GMC · 01-14-2006, 11:52 PM

im planning on a holley 500 as soon as money gets rolling. How did you manage to put a 4bbl on a v6?

jgrh64 · 01-15-2006, 06:58 PM

adapter for now. the 6066 GMC site has converted their manifolds over and are now in the process of custom making alum intakes and headers who says these motors won't run.Hot rod magazine had a V6 on the cover in the sixties with a tri-power set-up and headers.Someone looked into this and found the original molds were long gone for these parts.

01-10-2006, 07:12 PM	#1
JAKES 68GMC Aluminum slot wheels rule... Join Date: Jan 2006 Location: Maine Posts: 6,212	305 V6 carb adjustments Hello What are the carb adjustments for a carburetor for a 305 GMC V6? Does it have a Stromberg carb or a Rochester? It is a two bbl, and most websites say it has some sort of stromberg carb. Can someone post the adjustments on for me? Thanks. Jake

01-10-2006, 09:53 PM	#2
JAKES 68GMC Aluminum slot wheels rule... Join Date: Jan 2006 Location: Maine Posts: 6,212	Re: 305 V6 carb adjustments ttt

01-11-2006, 12:15 AM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: 305 V6 carb adjustments there are no set adjustments, you need to fine tune it

01-11-2006, 08:07 AM	#4
JAKES 68GMC Aluminum slot wheels rule... Join Date: Jan 2006 Location: Maine Posts: 6,212	Re: 305 V6 carb adjustments I was planning to just run it and tune it so it ran good. Have to figure out which screws are adjustments. I suppose it would help if I looked at it for more than 5 minutes at a time

01-12-2006, 10:56 AM	#5
TrainD5115 North Coast, baby! Join Date: Jun 2004 Location: Toledo, OH Posts: 437	Re: 305 V6 carb adjustments If memory serves, there are two adjustment screws. The one on the driver's side for curb idle and one on the passenger side for fast idle (cold choke). You may also have a throttle solenoid that energizes if the air conditioning or defroster is in operation. I don't think that 2bbl carb had any mixture control screws. __________________ Brad 79 Scottsdale C20 350/350 3.73's Still running full CA smog gear!

01-14-2006, 08:59 PM	#6
jgrh64 Prestige member Old Farts Club Join Date: Nov 2005 Location: Cleveland Posts: 502	Re: 305 V6 carb adjustments most of us have either switched to a holly 5200 2bbl or 4 bbl carb as most originals too small and worn out __________________ Hey sombodys gotta do it!

01-14-2006, 11:52 PM	#7
JAKES 68GMC Aluminum slot wheels rule... Join Date: Jan 2006 Location: Maine Posts: 6,212	Re: 305 V6 carb adjustments im planning on a holley 500 as soon as money gets rolling. How did you manage to put a 4bbl on a v6?

01-15-2006, 06:58 PM	#8
jgrh64 Prestige member Old Farts Club Join Date: Nov 2005 Location: Cleveland Posts: 502	Re: 305 V6 carb adjustments adapter for now. the 6066 GMC site has converted their manifolds over and are now in the process of custom making alum intakes and headers who says these motors won't run.Hot rod magazine had a V6 on the cover in the sixties with a tri-power set-up and headers.Someone looked into this and found the original molds were long gone for these parts. __________________ Hey sombodys gotta do it!



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