Multi carb 232/258

Frank's idea of only the center carb setup for idle/warmup I think is good, with progression on a pair of outboards. The 232 on the old iron manifolds at least seems a bit lean on the end cylinders, judging by plug reads. Progressive outer carbs set to just come out of mid-range when the center one is half-throttle might fix that. 

" I do have this stupid idea running around in my head to experiment with the old Buick Straight-8 idea of "compound carburetion".  That was the system where Buick had two 2-barrels, but only one was connected to linkage.  The other had a counterweight that would allow the secondary carb to remain closed until such an engine speed/vacuum situation called for it. At which point vacuum would overcome the counterweight and open the carb."

I understand that you are more interested in "looks" than "performance", but don't you think that you could have both with a similar set-up to what I've attached below.

Edited by g-man - May/26/2020 at 4:43pm

I had a lot of experience in tuning the Holley 5200 and Weber DGAV 32/36 carburetors as they were used in a four cylinder racing class that I was a part of. They were very easy to work with and if kept clean they really didn't give you much trouble. The parts between the Holley and Weber were mostly not interchangeable, but the architecture was the same, so if you could work on one, the other was very familiar. The amount of things that you could tune was incredible. Jets, air bleeds were removable, emulsion tubes could be changed, Even the accelerator pump had 2-3 different arm positions to adjust pump shot depending on model. It was truly a nice carb design. The Weber DGAS was a 38/38 carb that was different. It shared the design of the DGAV with it's larger choke horn than the 5200, but it was not a progressive carb. The DGAS had two gear driven throttles instead of a progressive linkage. The carb was illegal in my class, and due to its linkage, it was easy to police. It also had larger throttle bores. Wow, that was a lot of rambling...

Anyhow, for this type of application, are there better YF's as far as models or years to look for? I don't have to worry about emissions, but would be interested in simplicity or if any years had easier to tune features. I've rebuilt the one on my 73 232, and the design was much simpler than the Webers. It seems to use a metering rod that opens a jet orifice depending on height. Are there bigger/smaller jets, or bigger smaller metering rods? How do you adjust the main circuit of this carb? Also, does this carb have an accelerator pump? I see only the main diaphragm. I would imagine that if I was going to use this carb in a secondary situation, the secondary carbs should probably only have working main circuits as idle and accelerator circuits would probably cause extreme rich conditions. Is my thinking correct on this?

Thanks a lot for your help and advice!
Scott

Edited by MaxiBlue - May/27/2020 at 11:11pm

Only question I have is the older stock YF intake is cast iron..you would have to machine and weld cast iron.....