Carb adjustment help.

[FWB]

is anything done to the motor, meaning if its just a mild built windsor a 750 dp
will be too much carb. whats the timing set at? if you can get away with a couple of degrees advance more bump it and see if that affects the flat spot
if it does that might indicate too much carb if the flat spot move up in rpms
when it occurs.

[bly]

It is just a mild windsor....I had an old 750 holley dp before this one and was great for motor for years before I started to have problems with it, and replaced it with this Quick Fuel unit...
I will try to advance timing a smidge to see if it helps....Thanks again....

[FWB]

put a vacuum guage on it and adjust the mixture for best vacuum reading. when
you wack it up to 3\4 throttle from under the hood, do you see fuel going in
or does it spit in?

[Silverback51]

I know it's kind of basic, but did you check the float levels?

[convincor]

same problem with the old carb?
Try a different coil.

[jhv48]

Originally Posted by FWB

is anything done to the motor, meaning if its just a mild built windsor a 750 dp
will be too much carb. whats the timing set at? if you can get away with a couple of degrees advance more bump it and see if that affects the flat spot
if it does that might indicate too much carb if the flat spot move up in rpms
when it occurs.

I tend to agree with this one. If the carb is pushing too much air into the engine, it will crap out. One thing you can try is putting a very restrictive air cleaner (read that small) on the carb and then drive it. If the condition gets better, then you have found your problem.

That carb could just be pushing too much air for a mild 351W.

[bly]

OK guys, with much wasted time and a little money, I have solved my problem. After rejeting secondaries bigger squirters, bigger accelarator pumps, and then putting it all back to original, I pulled air cleaner off and drove, and now it runs like a banshee!!!!
I have a low profile pretty small air cleaner on it, not enough air....

Thanks to all the input I got on this, really appreciate it....Brandon.....

[convincor]

now we need to know, what filter were you running?