going from a 3600 to 4500-5000 stall

1 Bad Duster said
It's been hot an humid . I can find out by a calulator on the internet. I've done the converter an watching the tach. It went to 3600-3800 flashed too. But i wish I could footbrake to 3500 then I'd be happy an I bet with a loser converter my car won't act like it wants to cut off at a red light or stop sign.

Betting its more in carburetor tune and timing - shouldn't be stumbling even with a little tighter converter. Lot of guys think looser converter the better - all depends on where your motor is making torque. I would get the tune lined out before going with a higher stall which will only mask the underlying issues. You have jet extensions and a hose connecting the bowl vents? Some cars will slosh fuel out of the primary vent when the car launches which will sometimes cause the car to stumble momentarily. 4-6" piece of 5/16" with an oval cut out of the top side will help alleviate that issue. Jet extensions in the rear bowl will keep the jets submerged in fuel as its being pushed towards the rear of the bowl under accelleration. Will also need a notched float if you don't already have one. Do not put jet extensions in the front bowl - yes I have seen that happen before:violent1: