Mopar Muscle Association UK

I see lots of different stall speeds that get used and know the higher it is it's more for race that street use, but what's the stall speed of a standard convertor on a car to start with ????

It varies but will be around 1500 to 1800 rpm.

Cheers Blue

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The standard convertor on my car was about 1800 rpm stall, but my new cam doesn't 'come on' until about 2400rpm. That would mean, when I floor it from standstill, I'd have to wait for the road speed to catch up with the cam before it really got up and went. I've gone for a 2800 rpm stall convertor, which means as soon as I floor it, it should be on the cam and flying. That's the idea anyways...

Advertised stall isnt always accurate either. My stall is advertised at 2800 but is closer to 2200.
However, choosing correct stall to go with gears and cam makes a lt of difference. whilst i'm waiting for my 3.55 diff rebuild, the motor is grumbling a bit when in low revs with 3.23 rear.

The speed any given converter "stalls" at is determined by the torque curve of the engine.

The more torque the higher any given converter will stall.

So a converter that stalls at 1800rpm in a 318 might stall at 2800rpm in a 440.

Fitting bigger (longer duration) camshafts in an engine moves the torque curve higher up the rpm scale. This is how you make more HP.
But that usually means that with a longer duration cam you actually make less torque at lower rpms.
So any given torque converter in this hot engine is going to now stall at too low a speed. In fact it will pull the rpms down at idle.

So in engines with big cams you actually need a higher rated stall speed just to idle and drive in traffic correctly without the engine stalling.