Ok, picture this...

Your sitting at a stop light. Your friend who just bought one of those fancy new mustangs just pulled up next to you at the stop light. You've spent the winter working on your 305 to get it ready for the fun summer months...so you've been looking forward to this...

You look at him and he smiles...and guns his engine. You gun yours. You have a better exhaust so it sounds oh so much better. His smile slips a little....

You look up at the light. It turns green...and you gun it...he takes off like a bat out of hell and your car stumbled as you hit the gas, bogging (ok, I admit, poor choice of words but that's what it does) badly, almost coughing once before hooking up...

Oh it runs like a scared cat after the initial hiccup...but by then your buddy is 6 lengths ahead and laughing at you.

Ok, so that's what happened. When I hit the gas from a dead stop...it's like the car loses everything for a moment...then goes. I really don't know how to explain it better than that. Now I don't know, it might be due to the fact that it's got a carb...but my wifes car and our new truck, both fuel injected, don't have this problem.

I'm not looking for absolute solutions here, but any advice you guys might have I'd love to hear. I"m thinking I just have no power initially when I dump gas to it it's almost flooding it. Maybe a 2000 RPM torque converter would help?

Some facts on the car
305 H.O. Original, just went over 115k miles yesterday.
New Carb (Qjet from Jet Performance Products)
New Distributor cap, coil, plugs and plug wires (MSD)
Rebuild 700R4. I've got a B&M trans kit in it so it shifts really nice and hard.
Original 3.73 gears

 

It's not flooding, it's starving.

That's classic "quadrajet bog". It happens when the secondary air valve (AV) opens too quickly. There are two controls built into the carb to prevent that; 1) the AV tension spring, which is adjustable; and 2) the choke pull-off.

If this is a "new" Jet carb, it isn't likely that it's the pull-off, but it is possible (mine last year would pull in like it should, but had a leak and would release at too high a vacuum). The best way to test the choke pull-off is with a vacuum pump to see if it holds properly.

Go to the tech articles linked from the home page for a q-jet optimization article. It explains how to adjust the AV tension.

 

Sweet! Thanks. The carb is warrantied for 1 year which is good through august. I'll take a look at the tech articles and see if I can find the fix.