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Old 08-12-2016, 11:59 AM   #1
71GreenJunk
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Trying to find Stock Quadrajet Rod and Jet sizes

Well this weekend I'm picking up a complete '68 350 as a core to rebuild since my 307 has always been an underwhelming performer and now has a either a blown head gasket or cracked head. The 350 has a Quadrajet and while my previous experiences with Quadrajets haven't been great (a very poor rebuild by a "professional" and a pitted carb body on another), I'm going to give it another try because neither one of those gave me as much trouble as the Edelbrock 1406 that's on it now. I'm trying to find out the factory jetting and rod sizes for a C10 with a 350 without the air injection so I can have a good baseline to tune from. I've looked in my GM chassis overhaul manual and chassis service manual but neither list any Rod and jet sizes. Any help would be appreciated.
Thanks.
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Old 08-12-2016, 12:02 PM   #2
71GreenJunk
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Re: Trying to find Stock Quadrajet Rod and Jet sizes

Also has anyone got pictures of a manual pull cable choke setup on a divorced choke Quadrajet or an electric choke Quadrajet converted to manual choke? I don't care much for an electric choke.
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Old 08-12-2016, 12:36 PM   #3
davepl
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Re: Trying to find Stock Quadrajet Rod and Jet sizes

I don't have a shop manual handy but I've seen rod and hanger sizes and so on listed in other shop manuals, so there's a chance ours does too. A long shot, but...
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Old 08-12-2016, 01:36 PM   #4
kenn
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Re: Trying to find Stock Quadrajet Rod and Jet sizes

Hello and welcome
Cliff Ruggles book on Quadrajets is very good.
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Old 08-12-2016, 02:18 PM   #5
KY_GMC
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Re: Trying to find Stock Quadrajet Rod and Jet sizes

I second Cliff Ruggles.

http://www.cliffshighperformance.com/

Call him and give him your carb number and he will tell you what should be in there. He will also ask you a bunch of questions about what your plans are for your build, so be prepared and honest so that he can give you accurate advice. He may suggest something other than stock to get your engine to perform to the level that you desire.

Buy his book also, very good resource. It's got a lot technical information besides the rebuild process.

I took my standard Q-Jet from my 1972 350 and put it on a 383 stroker that I built with vortec heads. After describing my plans (remember, he will ask a lot of questions), he suggested the proper jets for my application and it has performed flawlessly. It idles great, off the line power is linear, and when the secondaries open, it makes a beautiful sound!

Good luck.
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Old 08-12-2016, 04:46 PM   #6
geezer#99
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Re: Trying to find Stock Quadrajet Rod and Jet sizes

My cousin Lars might have the right info for you in his charts.
http://www.digitalcorvettes.com/foru...ad.php?t=88376
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Old 08-12-2016, 04:52 PM   #7
webfoot
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Re: Trying to find Stock Quadrajet Rod and Jet sizes

Quote:
Originally Posted by KY_GMC View Post
I second Cliff Ruggles.

http://www.cliffshighperformance.com/

Call him and give him your carb number and he will tell you what should be in there. He will also ask you a bunch of questions about what your plans are for your build, so be prepared and honest so that he can give you accurate advice. He may suggest something other than stock to get your engine to perform to the level that you desire.

Buy his book also, very good resource. It's got a lot technical information besides the rebuild process.

I took my standard Q-Jet from my 1972 350 and put it on a 383 stroker that I built with vortec heads. After describing my plans (remember, he will ask a lot of questions), he suggested the proper jets for my application and it has performed flawlessly. It idles great, off the line power is linear, and when the secondaries open, it makes a beautiful sound!

Good luck.
^this is very good advice!

I rebuilt the quadrajet on my current truck (which is the old carb off my 71) with cliff's jets, rods, air bleeds etc and the thing runs like a champ.

Stock doesn't necessarily mean optimal.
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