Description says it all. I'm running a '58 vette 283 in my shoebox and could use some help. Try to keep the original manifold. I know the carter came stock but I'm currently running a Rochester 4jet that I would like to upgrade with a edelbrock. The square intake bores seem smaller (less than 1.5") than every adapter plate I'm seeing. Does anyone happen to know what I should be looking for? I've seen adapters for wcfb (?) And 4jet but both of those are listing a 1.5" bore size. When I measured with calipers I got 1.33. Am I missing something? Thanks for any help!
The new Edelbrock isn’t really an upgrade. Just a newer carb. The 4jet is a good carb, if it’s being funky just do a good rebuild on it. If you want an AFB carb, go look on EBay for an AFB number 4331. That came on 340 Buick’s and works great on a 283. Plus there aren’t many people looking for those so they are cheap. Bought one off eBay 2 weeks ago for 50 bucks for my 283.
You might have to make one,hopefully you have a friend with a machine shop or at least a CNC machine for the adapter
My sister had a '57 with a 350 hp 327 cam and I adapted a "C" series AFB to it. At the time, that adapter was readily available, and that thing ran great. It was an original Power Pack engine.
C series huh... I'll look into that. Maybe I'm using the wrong terminology for the adapter? Square bore small intake early chevy?Thanks joel.
Not really true. The new AVS 2 carburetor would be an upgrade as it it much more tunable and easier to tune. That to me is an upgrade. When was the last time a Carter carburetor had the possibility to tune the secondary throttle opening ? The only actual upgrade would be a replacement fuel injector type intake to replace the carburetor altogether. The only problem with the 500cfm Edelbrock, is that the secondary throttle blade is larger than 1.50". So, either a thick gasket or a 1/2" spacer would be required if you don't want to chamfer the secondary opening in the manifold. In any case, a 1/2" phenolic spacer is not a bad thing, as they help keep the carburetor cooler than without one. https://www.edelbrock.com/avs2-500-cfm-19034-carburetor-with-electric-choke-for-dual-quad-19034.html Mike
Agree with the gentleman that posted that the clone is NOT an upgrade, just newer. The pre-1960 manifolds have the center line of the carburetors closer together than the 1960 and newer manifolds. Thus even the small (400 CFM) Carters require an adapter to direct the A/F mixture; which really doesn't work well. If you are going to run a carburetor made after 1960, best to remove the intake manifold, and mill the ports for the new center line. That 4G series Rochester you have is one of the most reliable 4-barrels ever produced, much more so than the modern e-clone. Guessing that if your engine is basically stock, and you measured three 1/4 mile times with the Rochester and averaged them, then installed the e-clone and run three 1/4 mile times and average them; that the e-clone times would be slower than the Rochester, unless you spend a LOT of TIME and MONEY on tuning the e-clone. Of course, you will lose "kool" points from the younger crowd at a meet with the hood open. Jon.
Come to think of it , the adapter had tapered and maybe offset holes that allowed the AFB throttle bores to "line up" with the original manifold. This was in ' 66 or maybe '67. I was in boot camp in the fall of '67' so lots of stuff going on in a short time.
Definitely rebuild it. Does the carb have the little stamped tag on one of the top screws? Those contain good information you'll need to get the correct kit.
The Jalopy Journal
