Hello again. I recently discovered that an old carb that I had previously thought was an Edelbrock might really be a Carter AFB. Is there any way I can tell? Does anyone out there have any info or knwo of any books/websites about AFBs? If it is an AFB is it adaptable to a slant six? I think I read some articles about putting an AFB on a slant on the old Tailfins site, but I might be wrong. Any help would be appreciated. Thanks!

Reed

reed@seanet.com

Reed,
Yes, the Carter AFB and AVS look just like the newer Edelbrock carbs on the outside. I have heard that the Edelbrock has a "3 stage" metering system (3 steps on the step-up rods) but to be honest, I have never had one open to see this myself.

I do know that the AFB (and AVS and even Thermoquads) have been used on the SL6, in fact the Hyper-Pak system used a Carter AFB.
As they say, if you have one, why not give it a try, see how it runs and let us know.
DD

Edelbrock carbs have 3 step needles. And what is the best they're available with a kit with "all-in-one", a set of needles, jets and springs to calibrate them to any purpose. No need to buy these parts separately.

I have had a #1406 in my previous car with 360 CID. The fuel economy was the same as I had with Spread Bore -Holley, but the driveability under different conditions was much better. I personally never opened the carb to see fuel in it. I got the "jetting" done with only replacing needles and "power valve" -play done with testing the separate springs.

One adjustment step from hood closed to hood closed was about 2 minutes. It is only needed to remove the air cleaner, open 2 torx screws keeping 2 small covers over piston-spring-needle assemblies in carb, then replace what you want, put parts back -and do a test run. An alternative to cool down the car (or burn itw. fuel), take the fuel bowl(s) off, change the jets or a power valve, maybe gaskets and some o-rings too, check the leaks and so on.

Nice thing, at all.

JKKo


jari@kuparikuviot.fi

Thanks Doc, JKKo! I will definitely gic it a try. I found a book calledn "Super Tuning and modifying Carter Carburetors" so now I have some more infop. I do have one concern though, the carb is rated 625 CFM. Is this too much for a six? I will be using a head with Ford 300 vales installed and either the Comp Cams 264 S or Clifford 264 cam. Also, I need to get a four barrel manifold but I am worried about the flow characteristics of the Offy and Clifford manifolds. It looks like cylinders 3 and 4 would get the majority of the charge and 1 and six would barely get any. (I am designing the motor to be used in a rally racer so I am looking for more mid and low end grunt) Would the Doc's repro Hyper-Pak manifold be a better choice for a daily driver/rally racer with an auto?
Thanks for all the help!

Reed

reed@seanet.com

This shouldn't be a problem, the secondaries air flap opens on the airflow demands of the engine.

I have taken apart really olds AFBs and found the three step metering rods. Nothing new...



klesteb@aol.com

We are going to try the "new" AFB on a built 6 right off, just waiting on a few more parts. Using the 500 cfm unit w/ manual choke sold by Jegs, PAW, and Summit for about $210 new. Wanted a 400 cfm unit, but these haven't been sold since the late '70, early '80s. Due to the length of the Lokar kick-down cable, we have had to mount the carb with the primary's forward, but we do expect that the mixture problems will be next to nil. Using a 1" step-up plate (4 hole) from Trans-Adapt with mixture slots, and are prepared to mix and match jets side to side if we have to. Also added a hot water plate to the bottom of the Clifford intake with a valve so we can either run or not run the water flow from the bypass connections to the intake.

Makes a very neat and well layed out setup, just sorry I can't make the digital camera work.


sgw041454@aol.com

The Hyper-Pak really does have good low-end and mid range power. Trouble is that these manifolds tend to "run-out" at 5000-5500 RPM, not all that bad if your rearend gearing is correct.
DD

Allright! Now I guess I have to save my money and buy one of the repros from Clifford. Unless anyone out there has an old hyper pak manifold they would let go for cheap! (yeah right ; )) How much does Clifford charge for those anyway? I think I heard around $500.

Thanks again for the info and help!

Reed

reed@seanet.com