Quadrajet Help please
Team Owner
Joined: Jan 2006
Posts: 39,344
Likes: 171
From: Into the Mystic And yet, despite the look on my face, you're still talking TN
St. Jude Donor '09 thru '25
If you want to maintain an original level of performance, you need to locate a good rebuildable Q-Jet 750 carb - you can e-mail me for info about how to go about doing that. If your car is too fast and you need to tone it down, step down to an Edelbrock so-called "Performer" carb (actually a re-pop of the old Carter AFB carbs, which were deemed obsolete by GM after the 1966 model year - we used to throw those carbs in the trash can back in the early '70s...). The Edelbrock carb will make your car run as smooth, powerful, and reliably as your aunt Edna's Caprice station wagon, which is not a bad choice for some people. 
Lars
Lars
Tech Contributor
Joined: Aug 1999
Posts: 14,370
Likes: 6,361
From: At my Bar drinking and wrenching in Lafayette Colorado
Mike has decided to put in a little work and effort to bring his '68 back to it's "correct" configuration, appearance, and level of performance by shopping for an original '68 L79 intake manifold and finding a rebuildable 4MV (divorced choke) Q-Jet. I'll be helping him to get it all rebuilt and configured back to its correct state of performance, which should make his car a lot of fun to drive (and to pop the hood to show it all off). Let's wish him success in his shopping quest for some good parts!
BTW: If anyone has a non-molested (not commercially rebuilt), rebuildable '68 or '69 Chevy passenger car Q-Jet without excessive rust and damage, let me or Mike know. E-mail me if you have something that we might be able to use to get Mike on the road to recovery:
Lars
V8FastCars@msn.com
BTW: If anyone has a non-molested (not commercially rebuilt), rebuildable '68 or '69 Chevy passenger car Q-Jet without excessive rust and damage, let me or Mike know. E-mail me if you have something that we might be able to use to get Mike on the road to recovery:
Lars
V8FastCars@msn.com
Thread Starter
Instructor
Joined: Jun 2018
Posts: 110
Likes: 3
Updates
Hello Everyone
Thought I'd share some updates so far.
Purchased the 68 intake, it arrived this weekend looks good.
Car came with a choke cable installed but disconnected. (I have owned this car for 3 months, I saw the cable under the dash but did not put 2 and 2 together until discussing with Lars.)
I reconnected the manual choke,When engine is cold, I can pull choke cable towards me, pump the gas pedal 3 times and she starts right up.
(not ideal but better)
Also noticed the secondaries were not kicking in.
I attributed this to the poor rebuild and missing linkages on current unit.
Well while setting idle speed I noticed a lot of slack in the throttle cable.
Backed the cable out to remove slack.
re-adjusted idle speed
Secondaries now work!
Still determined to install intake and find a core for Lars to rebuild.
Thanks for all of the ideas and advice!
Mike
Thought I'd share some updates so far.
Purchased the 68 intake, it arrived this weekend looks good.
Car came with a choke cable installed but disconnected. (I have owned this car for 3 months, I saw the cable under the dash but did not put 2 and 2 together until discussing with Lars.)
I reconnected the manual choke,When engine is cold, I can pull choke cable towards me, pump the gas pedal 3 times and she starts right up.
(not ideal but better)
Also noticed the secondaries were not kicking in.
I attributed this to the poor rebuild and missing linkages on current unit.
Well while setting idle speed I noticed a lot of slack in the throttle cable.
Backed the cable out to remove slack.
re-adjusted idle speed
Secondaries now work!
Still determined to install intake and find a core for Lars to rebuild.
Thanks for all of the ideas and advice!
Mike
