AVS2 800 carbs

For Edelbrock 750 owners, I'll add this information for anyone that it might help:

When I first came to this site with some problems a couple of years ago (?) I didn't know much about tuning. Well, it's been an education!! But a lot of fun to figure some things out. Here goes:

Don't let anyone tell you that you can't tune the 750. Yes, they do in fact have some limitation in the amount of fuel that they will ultimately supply in the secondaries, but for most people I think frustrations lie elsewhere. (This is my experience, my findings, so things might be different for others!)

I have a 9:1 340 with ported X heads, mild 284 Lunati cam, that likes a lot of fuel with the throttle down, but doesn't need so much at part throttle. Other motors will vary in needs, but here are a few things that might help if you are having problems with:
Rich idle and smelly exhaust
Throttle response
Flat spots, etc.

Throw away the book!!! Watch the plugs or get an A/F meter and vacuum gauge.
Biggest help for me was doing these things:

--Use an accelerator pump from the 800 (#1468)
--Install .043 accel. pump nozzles/"squirters" (#1475 for kit)
--Don't be afraid to use bigger jets in secondaries than you use in primaries.

MY OWN EXPERIENCE!!!
I run .104's in front (68x42 rods right now) and have .119's in back*
(*I find that .110/.113/.116/.119 all give me the same A/F readings, so there's the limitation in back that the 800's don't have.)

My A/F readings:
Idle 13.5 at 800rpm (max. vacuum) screws 3/4 out
Light throttle 12.5-13
Steady cruise at 2200 in town, or highway in O.D. 13.5-14 (4.10's with 518 trans)
WOT 12-12.5

(Vacuum reading at WOT is 1-1.5" so carb is sized right)
Timing 22*/34* total.
Throttle response is crisp off-idle or from low rpm. Engine pulls good.
Plugs have a nice tan ring at base of porcelain and light black all around the base, timing mark right at bend of strap.

I have an A/F meter and vacuum gauge plus a lot of testing, so am fairly sure of my #'s, and am fairly happy with the manual choke 750 right now, but it's faster at the strip if I jet too rich in front to make up for the limitations in back. For this reason I'm going to the new AVS2 800.