The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 08-12-2016, 11:59 AM   #1
71GreenJunk
Registered User
 
Join Date: Feb 2016
Location: Cave City, KY
Posts: 33
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.
Posted via Mobile Device
71GreenJunk is offline   Reply With Quote
Old 08-12-2016, 12:02 PM   #2
71GreenJunk
Registered User
 
Join Date: Feb 2016
Location: Cave City, KY
Posts: 33
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.
Posted via Mobile Device
71GreenJunk is offline   Reply With Quote
Old 08-12-2016, 12:36 PM   #3
davepl
Registered User
 
davepl's Avatar
 
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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...
__________________
1970 GMC Sierra Grande Custom Camper - Built, not Bought
1969 Pontiac 2+2 427/390 4-speed Coupe
1969 Pontiac 2+2 427/390 4-speed Convertible
davepl is offline   Reply With Quote
Old 08-12-2016, 01:36 PM   #4
kenn
Registered User
 
Join Date: Oct 2013
Location: CT.
Posts: 260
Re: Trying to find Stock Quadrajet Rod and Jet sizes

Hello and welcome
Cliff Ruggles book on Quadrajets is very good.
kenn is offline   Reply With Quote
Old 08-12-2016, 02:18 PM   #5
KY_GMC
Registered User
 
KY_GMC's Avatar
 
Join Date: Dec 2012
Location: Fort Thomas, KY
Posts: 290
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.
__________________
1972 GMC 1500 Super Custom, 383 Stoker, TH350

Build Thread
http://67-72chevytrucks.com/vboard/s...d.php?t=592157
Engine Thread
http://67-72chevytrucks.com/vboard/s...d.php?t=592233
KY_GMC is offline   Reply With Quote
Old 08-12-2016, 04:46 PM   #6
geezer#99
Registered User
 
geezer#99's Avatar
 
Join Date: Aug 2009
Location: Bowser
Posts: 13,607
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
geezer#99 is offline   Reply With Quote
Old 08-12-2016, 04:52 PM   #7
webfoot
Registered User
 
Join Date: Nov 2007
Location: Hermiston, OR
Posts: 947
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.
__________________
Running in place gets you nowhere fast.
-me
1968 GTO 4-spd covnvertible

1970 K-20 4-speed, factory AC.
webfoot is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 11:52 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com