Im trying to figure out what a good stall and zice on the converter would be on a rb 500 whit a 509 hydralic cam would be in a 68 Charger 3:23 or 3:55 rear end for the street mostly.

Call the guys Dynamic Converter, or Lenny at Ultimate converters and outline your combo and intent, either of these companies should be able to get you into the right converter. There's a few others that will be suggested here as well. I run a Dynamic 9-1/2" converter that was custom built for my combo, and it has performed great for a few years now. I'd use these guys again, but most here tend to speak real high Lenny.

As I always do... I suggest a call to Turbo Action.

www.turboaction.com

I am with Stealth
I ran a 509 cam in a 440 daily driver strip car , they love comp - stall - gear
I had a 4200 originally with 3.9 gears , got a Dynamic 9 1/2 (5100) then 4.10 gears . Kept going faster .
Even with the stroker I would not look under 4000 and a bit more gear .
my 2 cents

Tex

With your combo and intended usage, you would have been better posting this in question and answer because a lot of people that frequent this part of the site are in the "too much is just right" category. If it is mostly street use and possible long runs i wouldn't go over 3000 stall and use the 3.23 gears, the extra cubes will swallow a lot of the .509's dur up.
Mick

PTC (Performance Torque Converter) They are Mopar guys that get it right the first time and are affordable.

I agree with Dave....

I buy mine from PTC. They build what you need and they work great.

You will definitely have to stress your preference's to the converter builder for this car. Stress what rpm you are willing to allow for cruise speed. He should be able to build you a unit that you are happy with, and not have to send it back to change the stall.

Put your motor on a dyno, go to your favorite convertor guy, give him the dyno sheet, AND the info on your car, weight, gear, tire. Dave

Had a off the shelf 10" ATI behind the 493" for years. Run 3.55s and a 30" tall tire. Great street manners, would drive like normal just about until you punched it, and would flash to ~4000+ rpm

Switched to a 9 1/2 Dynamic spec'd for it, and it picked up a little at the track, but the street manners suffered a bit.

I'm running an off the shelf TA 2800 converter from Mancini in my 9:1 493 with that same cam and 3.23's.

It's in a 4800 lb C body. My engine is making 500 ft/lbs by 2000 so it worked OK on the street but the 1100 RPM idle was banging the crap out of the drive line when you put it in gear.

Kevin