I hate stock carb, upgrade to 500 Holley on V-6?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

chevy_fatman · 09-20-2006, 07:18 PM

My stock carb just took a crap on my V-6, I already have the 500 cfm Holley carb and wanna upgrade, what do I need to put it on my V-6? and how do I do it?

Thanks in advance.

Paul

WyoRoadDog · 09-20-2006, 08:15 PM

GMC V6? Here's the info you need:
http://www.6066gmcguy.org/holley.htm

JAKES 68GMC · 09-20-2006, 10:33 PM

I think you need to get a trapezoid to Holley 2bbl. adapter made. The bolt patterns are different between 305 and 351+ V6's for the carbs. 351 is a trapezoid, 305 a normal rectangle.

You could go the other route and make your intake in to a 4bbl. one. You can do that with a 351 and up V6 intake. Theres pics of one online somewhere, I think I sent you the link once, Fatman.

Either way a carb upgrade is good for the V6. Makes them much more responsive (even though they are kinda slugs) and powerful.

chevy_fatman · 09-24-2006, 06:09 PM

WyoRoadDog, Thanks for the link, I've been to that site many times before, I don't know how I could forget to check it

Jake, yes you sent me that link before but I couldn't find it, I found it just now, I tried the upgrade back in '03, bought the stromberg to holley adapter and the carb, put it on and got it running but the truck smoked like a freight train so I took it off and put the old carb back on and stashed the holley away, now I have to to upgrade, I may be going with a 351 intake now.

Thanks.

JAKES 68GMC · 09-24-2006, 09:07 PM

Was it fuel smoke (too rich or lean) or engine smoke, like burning oil? Either way, have fun with it.

chevy_fatman · 09-24-2006, 09:57 PM

It was fuel smoke, (running too rich) I've read the 6066gmc page and I noticed it has been updated, that shiney intake wasn't there before and some more facts have beed added.

TP from Cntl PA · 09-25-2006, 09:02 AM

You gonna sell that carb Fatman after you remove it? I am trying to stockpile V-6 parts for mine should I ever need any..........

JAKES 68GMC · 09-25-2006, 03:40 PM

Quote:

Originally Posted by chevy_fatman

It was fuel smoke, (running too rich) I've read the 6066gmc page and I noticed it has been updated, that shiney intake wasn't there before and some more facts have beed added.

Mine smoked pretty bad when I first put the carb on. I fooled with the float and adjusted the idle fuel mixture settings. Runs better now but still puffs out black clouds when you rev it. And now it's starting to puff blue smoke out when you first start it up.

chevy_fatman · 09-25-2006, 08:04 PM

Quote:

Originally Posted by TP from Cntl PA

You gonna sell that carb Fatman after you remove it? I am trying to stockpile V-6 parts for mine should I ever need any..........

Heck no, ain't selling it!! one man's junk is another man's treasure, to me is junk, I'll just give it to you when I get to take it off, how's that? besides I know where I can get a whole 305 from pan to carb

Quote:

Originally Posted by JAKES 68GMC

Mine smoked pretty bad when I first put the carb on. I fooled with the float and adjusted the idle fuel mixture settings. Runs better now but still puffs out black clouds when you rev it. And now it's starting to puff blue smoke out when you first start it up.

Oh ok I see now, I did mess with it for a lil' while but I have the attention spam of a goldfish to fool with it longer than 5 min

I'll get to to do it again sometime this weekend, post some pics of your setup, Thanks for the feedback.

09-20-2006, 07:18 PM	#1
chevy_fatman Where's my beer? Join Date: Aug 2002 Location: I live in the state of denial.... Posts: 5,621	I hate stock carb, upgrade to 500 Holley on V-6?? My stock carb just took a crap on my V-6, I already have the 500 cfm Holley carb and wanna upgrade, what do I need to put it on my V-6? and how do I do it? Thanks in advance. Paul __________________ Paul How do you make the invisible, visible?.........You take it away.

09-20-2006, 08:15 PM	#2
WyoRoadDog Page intentionally left blank. Join Date: Jul 2006 Location: Laramie, WY Posts: 299	Re: I hate stock carb, upgrade to 500 Holley on V-6?? GMC V6? Here's the info you need: http://www.6066gmcguy.org/holley.htm __________________ There is a theory which states that if ever anyone discovers exactly what the Universe is for and why it is here, it will instantly disappear and be replaced by something even more bizarre and inexplicable.There is another theory which states that this has already happened. - Douglas Adams '67 GMC 4x4, 305 V6! Or all the parts for anyway... '17 Subaru Outback. '18 Toyota Tacoma TRD Off Road. '99 Ducati 900SS.

09-20-2006, 10:33 PM	#3
JAKES 68GMC Aluminum slot wheels rule... Join Date: Jan 2006 Location: Maine Posts: 6,212	Re: I hate stock carb, upgrade to 500 Holley on V-6?? I think you need to get a trapezoid to Holley 2bbl. adapter made. The bolt patterns are different between 305 and 351+ V6's for the carbs. 351 is a trapezoid, 305 a normal rectangle. You could go the other route and make your intake in to a 4bbl. one. You can do that with a 351 and up V6 intake. Theres pics of one online somewhere, I think I sent you the link once, Fatman. Either way a carb upgrade is good for the V6. Makes them much more responsive (even though they are kinda slugs) and powerful.

09-24-2006, 06:09 PM	#4
chevy_fatman Where's my beer? Join Date: Aug 2002 Location: I live in the state of denial.... Posts: 5,621	Re: I hate stock carb, upgrade to 500 Holley on V-6?? WyoRoadDog, Thanks for the link, I've been to that site many times before, I don't know how I could forget to check it Jake, yes you sent me that link before but I couldn't find it, I found it just now, I tried the upgrade back in '03, bought the stromberg to holley adapter and the carb, put it on and got it running but the truck smoked like a freight train so I took it off and put the old carb back on and stashed the holley away, now I have to to upgrade, I may be going with a 351 intake now. Thanks. __________________ Paul How do you make the invisible, visible?.........You take it away.

09-24-2006, 09:07 PM	#5
JAKES 68GMC Aluminum slot wheels rule... Join Date: Jan 2006 Location: Maine Posts: 6,212	Re: I hate stock carb, upgrade to 500 Holley on V-6?? Was it fuel smoke (too rich or lean) or engine smoke, like burning oil? Either way, have fun with it.

09-24-2006, 09:57 PM	#6
chevy_fatman Where's my beer? Join Date: Aug 2002 Location: I live in the state of denial.... Posts: 5,621	Re: I hate stock carb, upgrade to 500 Holley on V-6?? It was fuel smoke, (running too rich) I've read the 6066gmc page and I noticed it has been updated, that shiney intake wasn't there before and some more facts have beed added. __________________ Paul How do you make the invisible, visible?.........You take it away.

09-25-2006, 09:02 AM	#7
TP from Cntl PA Registered User Join Date: Apr 2003 Location: Central PA....In the Berg of Nisbet Posts: 790	Re: I hate stock carb, upgrade to 500 Holley on V-6?? You gonna sell that carb Fatman after you remove it? I am trying to stockpile V-6 parts for mine should I ever need any.......... __________________ '72 K-20 EFI'ed 250 Inline/4spd stake body, Farm Truck '71 C-20 Cummins Diesel Powered, In storage thanks to $5.00 diesel! '69 3500 GMC 305V-6/4spd, Still under reconstruction.......... Inlines Rule! 6 soldiers standing is better than 8 laying down!!!!!!!!



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