2bbl to 4bbl conversion?

There’s really no reason to run two carters.

Rochester’s are much better.
But I had the adapter and the carbs sitting around and decided why not see what happens.

So I hit McMaster and bought some hardware and it was done

What do you think about sealing up most of it and leaving the transfers exposed? Right now it’s got a pretty big ring of light around it. Maybe run them square and slightly exposed. There is a paste made out of graphite, jb weld, and acetone that hardens up and helps seal where you need it. The Rochester guys use this quite a bit when running primary carbs on the back and with tri power carbs.


Even my Holley has some light around the secondary but it isn’t much. It made a huge difference in tuning when I made that as little as possible as someone had messed with it before I owned it.

It was open like 1/16” on the secondary and jetted down 2 with the wrong pump cam ....too small.

I put the 600 back to spec and it was a lot better but it took a lot of understanding to figure that out....you helped a lot with that.

which led me to looking at the problems with the double 2 and why it was so hard to tune.