350 SBC with Edelbrock carb - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Lances69 · 01-06-2011, 10:28 PM

i removed the quadrajet from my sbc350 cause it was flooding badly, my dad had an edelbrock off of a for 302 that had lots of goodies on it, i had to use a spacer since the edelbrock butterflys would not work with the stock quadrajet manifold, the edelbrock had lots of junk in the carb, so we cleaned it out with carb cleaner and it ran pretty good when we got it on, but yesterday we took it back off to clean it some more and now it wont stay running and it backfires. I'm just wondering if that edelbrock is giving the engine too much fuel. It would be great if someone has has this problem and knows how to fix it, we think when we cleaned it it cleaned some gunk out blocking the jets. help appretiated, thnx in advance

Indian113 · 01-06-2011, 10:41 PM

I'd check for a air leak,spray some wd40 aroundbase as it idles and see if it picksup.

Lances69 · 01-06-2011, 10:49 PM

well, i can't get it to idle, it wont stay running unless i hold the throttle down, we've adjusted the carb, and changed the sparkplugs, nothing seems to work

hugger6933 · 01-06-2011, 11:11 PM

sounds like you have a LARGE vaccum leak. Check the port where the power brake fitting is also check the hose for the pvc valve. It has to be the problem there also look at the base gasket. Jim

68 C-10 KID · 01-06-2011, 11:37 PM

Take it off and install a Holley or Holley based carb.
Not to be a smart a@!
Holley has many more adjustments to tweak to your motors vacuum and air screws to get it to pure like a bad cat.

Lances69 · 01-07-2011, 12:14 AM

alright guys i fixed it, i put the qjet back on when i found it, started it and it ran just fine, later on i'll get a holley cause my friends say they never had any luck with eddys, they used holleys, i guess the eddy was drowning my engine in fuel, or it could'ave been a major leak between the carb and spacer, but its fixed now so i'm happy, thanks

piecesparts · 01-07-2011, 08:48 AM

To each his own. I have no particular issue with any carb brand, but I am presently running the Edelbrock carbs on my truck and my Son's truck. I tuned them in and they work very well on my 383 stroker engine and a cammed up 350.

flashed · 01-07-2011, 10:46 AM

If you decide later on to sell the Quadrajet I would be interested.

01-06-2011, 10:28 PM	#1
Lances69 Registered User Join Date: Jan 2011 Location: Colcord, OK Posts: 19	350 SBC with Edelbrock carb i removed the quadrajet from my sbc350 cause it was flooding badly, my dad had an edelbrock off of a for 302 that had lots of goodies on it, i had to use a spacer since the edelbrock butterflys would not work with the stock quadrajet manifold, the edelbrock had lots of junk in the carb, so we cleaned it out with carb cleaner and it ran pretty good when we got it on, but yesterday we took it back off to clean it some more and now it wont stay running and it backfires. I'm just wondering if that edelbrock is giving the engine too much fuel. It would be great if someone has has this problem and knows how to fix it, we think when we cleaned it it cleaned some gunk out blocking the jets. help appretiated, thnx in advance __________________ 69 chevy lwb, SBC 355, edelbrock carb w/ spacer on stock qjet manifold, accel HEI ignition, headers, THM400 tranny, 3.08 gears,Daily Project

01-06-2011, 10:41 PM	#2
Indian113 Registered User Join Date: Sep 2009 Location: Monroe,Iowa Posts: 4,370	Re: 350 SBC with Edelbrock carb I'd check for a air leak,spray some wd40 aroundbase as it idles and see if it picksup.

01-06-2011, 10:49 PM	#3
Lances69 Registered User Join Date: Jan 2011 Location: Colcord, OK Posts: 19	Re: 350 SBC with Edelbrock carb well, i can't get it to idle, it wont stay running unless i hold the throttle down, we've adjusted the carb, and changed the sparkplugs, nothing seems to work __________________ 69 chevy lwb, SBC 355, edelbrock carb w/ spacer on stock qjet manifold, accel HEI ignition, headers, THM400 tranny, 3.08 gears,Daily Project

01-06-2011, 11:11 PM	#4
hugger6933 Registered User Join Date: Oct 2008 Location: Marianna Arkansas Posts: 7,257	Re: 350 SBC with Edelbrock carb sounds like you have a LARGE vaccum leak. Check the port where the power brake fitting is also check the hose for the pvc valve. It has to be the problem there also look at the base gasket. Jim

01-06-2011, 11:37 PM	#5
68 C-10 KID Mean Green Join Date: Sep 2007 Location: Portland, OR Posts: 522	Re: 350 SBC with Edelbrock carb Take it off and install a Holley or Holley based carb. Not to be a smart a@! Holley has many more adjustments to tweak to your motors vacuum and air screws to get it to pure like a bad cat. __________________ 427 SBC 683HP & 590ftlbsTRQ @ fly wheel. 60'-1.38 1/4-10.43 MPH-124.6 New ET current 4/2019 AKA MEAN GREEN.

01-07-2011, 12:14 AM	#6
Lances69 Registered User Join Date: Jan 2011 Location: Colcord, OK Posts: 19	Re: 350 SBC with Edelbrock carb alright guys i fixed it, i put the qjet back on when i found it, started it and it ran just fine, later on i'll get a holley cause my friends say they never had any luck with eddys, they used holleys, i guess the eddy was drowning my engine in fuel, or it could'ave been a major leak between the carb and spacer, but its fixed now so i'm happy, thanks __________________ 69 chevy lwb, SBC 355, edelbrock carb w/ spacer on stock qjet manifold, accel HEI ignition, headers, THM400 tranny, 3.08 gears,Daily Project

01-07-2011, 08:48 AM	#7
piecesparts Parts and more parts Join Date: Nov 2003 Location: Lebo, Kansas (middle of nowhere Posts: 6,821	Re: 350 SBC with Edelbrock carb To each his own. I have no particular issue with any carb brand, but I am presently running the Edelbrock carbs on my truck and my Son's truck. I tuned them in and they work very well on my 383 stroker engine and a cammed up 350. __________________ Frank

01-07-2011, 10:46 AM	#8
flashed Registered User Join Date: Oct 2009 Location: canton ga Posts: 12,728	Re: 350 SBC with Edelbrock carb If you decide later on to sell the Quadrajet I would be interested.



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