Start with the baseline, out-of-the box settings and see what it needs.  Don't make any guesses.


Lawrenceville, GA

I'd go with Charlie on this. See how it runs, check the plugs, then go to the tuning manual. It did come with a tuning manual, didn't it? It's your best friend.

miker
55 bird, 32 cabrio F code
Kent, WA
Tucson, AZ

Somewhere in my stash of info I had the factory listed jet sizes for different altitudes that always showed slightly smaller jets for 3000-5000 ft and then smaller again for 5000+. Naturally I can't find it now.

Jet sizes for any carb other than the Summit carb will not be applicable. It should follow the same trend. That is it.


Lawrenceville, GA

Thats all I was suggesting, regardless of carb make the jetting will be smaller at higher altitudes in most cases. Just using the factory specs as an example.

Been running the summit 600cfm and love it. lots more power and smoother. One problem I am having is if I blip the throttle reall quick it revs nice but then the idle will drop really far and want to die. Any thoughts? i have checked the float levels and fuel pressure is right around 5. so close to perfection if I can just get this one thing dialed. thanks

Who makes the carbs for Summit?

Darrell Howard Whitefish, MT Outlaw 56 Ford F-100's

Ported vacuum fixed it. weird but it likes that way better than manifold vacuum

That would be Holley.  Here’s a picture of the 600 and 750 cfm carbs when Holley was selling them.
 

Lorena, Texas (South of Waco)

One of my Yblocks is a 292 that is eventually going to be built to the max. I got an edelbrock for that one already. I have another 272 that will forever be tame while I have it, and no plans for much over stock. Would the 600 still be a good choice just in case? Maybe Im better off sticking with Edelbrock so I dont have to figure out tuning on two different carbs?

Darrell Howard Whitefish, MT Outlaw 56 Ford F-100's