I've been running one on my RR for years. Bought the 500 new and cut the air cleaner ring to match the two bbl Holleys. You have to use the linkage from an original six pack center carb. I had an old, modified one that wasn't working very well. There are some differences, and my center carb uses quite a bit more jet than a stock six pack. I used the 500 out of cheapness...it was about $250 less than a center six bbl. I can check jet sizes if anyone cares.My first setup with the 500 center carb had the back half of the carb mount cut off to match the stock six pak configuration. It fit just fine with the OEM '69 air cleaner setup. I can see lots of grinding was needed.
So If you've got the right ford carb, you can just swap fuel bowl and metering plate from the stock center carb?
Here are some photos of the 500 on my car. I did not do the modifications. They were done by a friend of mine.Not exactly.... and it doesn't have anything to do with "Ford" but it has everything to do with "Holley".
1. You can get OEM 500cfm Holley 2-barrels on Fords, Mopars and others too....Chevy, Pontiac?
2. I don't think that how the passages of a Holley main body match up with passages on metering bodies are "universal", but I'm not positive on that. I'm not sure if you can "mix & match" parts like that.
3. The main issues I see with a 500 cfm center carburetor are:
a. how linkage connects with outboard carburetors
b. the "D" shape of six pack throats. I think Fords are the same and Chevies have a slight "V" shape on the flat part of the "D".
Here's a question..... The baseplate of the center Mopar six pack carburetor has smaller "butterflies" than the outboard carbs. Is there a way to swap out JUST the baseplate & get 500 cfm or is the venturi of the center carburetor what limits it to 325 cfm?
The white junk on the carb is from a fire. Long story, but I have photos of that too. I run 73 (Holley) jets in the center. I have ProMax metering plates on the end carbs. The fronts are 87, the rears are 89. TomHere are some photos of the 500 on my car. I did not do the modifications. They were done by a friend of mine. View attachment 382050 View attachment 382051 View attachment 382052
I'm not so sure it will give you more performance than a stock setup. As mentioned, I did it to be a bit thrifty. A six pack setup only works if it all works together. I've been told that the stock intake will only flow so much. I know stock eliminator cars that are running bottom 10's with a stock set up, including the intake, heads and stock valve size. Mine has only gone low 11's on another engine. Below are the post-fire photos I mentioned above. Thank God Tommy was there with his fire extinguisher!!I'd be interested in knowing more about that center carb Frustration. I think it's my never-ending search for more speed
Not sure what you are asking here. Sorry.is there enough material to fit a threaded tube in the venturi?
I honestly can't remember. If you're thinking about the vacuum hose barb that goes into the side of the body, I'm pretty sure we JB welded a tube into the side of the body. The biggest problem I had was with the hose for the PCV valve. It comes off the bottom/back of the carb. I used a 90 degree fitting, but needed to modify that as well to make the turn without hitting my rear carb bowls. Just had the car out for a ride. It drives great. No issues whatsoever. When the outboard carbs come in...it's a beautiful thing. HAPPY NEW YEAR to all!!If you drill a hole in the side of the body/venturi, is there enough material in the wall to tap threads?