Posts by hybrid67_old

RPM, you said I shouldn't go with higher than 3000 rpm because it would be tough to drive on the street. Why? I guess the only way I an going to truly understand this is a comparison. I have 2 equal cars one with a 2000 rpm converter and one with a 3000 rpm. What happens when they are at a dead stop and pull away? 66kcar, the transmission I'm taking out is a PEE-C code with a 1967 date code. Not a PEE-K.

I guess I'm just not understanding the whole theory behind the stall RPM. I think the best explanation I've read is it is the equivalent of dumping the clutch on a manual trans. So a 2400 rpm stall is like revving your engine up to 2400 RPM before you let out the clutch. On the other hand I've been told that it is the point where the engine will stall if you give it gas while holding the brake. That would make sense to me ("stall" speed). All I know is when I bought the car it only had 2nd & 3rd gear and the previous owner broke the tires loose pulling out in 2nd. With a stock 1950 rpm converter.

I am in the process of swapping out my old stock C4 for a PA Super Streeter transmission. My old one bled to death on the garage floor. As part of the process I also want to upgrade from the stock converter to something a little beefier. I don't need anything too radical because I only use the car for street driving, no racing. I have been on the web looking at all of the suggestions, formulas, etc. I even called a few places. I can't figure how high of a stall speed to go with. According to the shop manual a Hipo came from the factory with a 1750-1950 rpm converter. According to the aftermarket manufacturers, I should be running a 3500-4000 rpm converter because of the 310 degree duration of the cam. But that's with 3.73 and above gears. I am also being told that if I go higher than 2400 stall, that I have to install an trans cooler. Does anyone have any suggestions? Has anyone else found a combination that works?