75 Rochester Carb
Thread Starter
Drifting
Joined: May 2020
Posts: 1,663
Likes: 702
From: Baton Rouge, Louisiana, metro area
Carbs don't "****-the-bed".......they either get murdered by idiots who think they know more than Rochester did or they get gummed up from sitting too long......these carbs have a terrible reputation due to dumb *** 70's and 80's "mechanics" who did not have the ability to go through one properly......just like anything, there will always be a faction of pretentious ******** who live in a fairly tale world and blame everyone but themselves.......but going through a Q-Jet is not as difficult as people make it out to be......
The truck Q-Jet is fine......most trucks had 350's in them and you have a 350......the jetting may be a little off......but get the timing and curve right and drive it......find a correct unit later......
Whatever you do....DO NOT use an adapter to bolt a Square Bore carb like a Holley or Edelbrock to the Q-Jet manifold.....terrible idea. And you may know this already but never buy a commercial "re-man" Q-Jet from anybody......
Jebby
The truck Q-Jet is fine......most trucks had 350's in them and you have a 350......the jetting may be a little off......but get the timing and curve right and drive it......find a correct unit later......
Whatever you do....DO NOT use an adapter to bolt a Square Bore carb like a Holley or Edelbrock to the Q-Jet manifold.....terrible idea. And you may know this already but never buy a commercial "re-man" Q-Jet from anybody......
Jebby
I most definitely know my limitations. Carbs are something I don’t mess with. I don’t even know what most of those screws and ports are for, much less think I can make it better!
I recall when I got my 82 Crossfire. It looked very intimidating until Bucaneer helped me understand the various sensors and fuel delivery channels. I was able to rebuild the system a few times afterward.
No way I would monkey with a system unless I completely understand it.
In my day job, I rebuild diving regulators and other equipment. I know how things can get messed up when you don’t know how it works.
Lars sent me several docs to study. I will be working on getting the timing right.
Thank you for the help.
d
Tech Contributor
Joined: Aug 1999
Posts: 14,380
Likes: 6,390
From: At my Bar drinking and wrenching in Lafayette Colorado
As Jebby stated, I think your car will run pretty nicely once you set up the timing correctly. If you want some tips on locating a correct carb, drop me an e-mail for some carb locating papers and suggestions.
Lars
