C6 torque convertor question

Hey folks,

Is there a way to tell the stall speed of a torque convertor that has no markings on it? I don't believe its a factory part since ford usually had they're name stamped somewhere.

Thanks,

Evan

 

You MIGHT be able to get some idea buy the overall size of it vs a known stock convertor. 13-12 11 10 8 7 ect. I guess you could say that a 8" might generally be 4500-6000 depending on the engine torque. I have a TCI 11" STREET FIGHTER behind a 302 that is 2800. Are there any numbers at all on it?

 

Stock original torque converters that have never been rebuilt are bare steel, while rebuilt ones (including higher stall rebuilt converters) and new aftermarket converters, are painted.

usually performance converters have something like a part number stamped on them...

 

Huh.... its a minty green color and about 10" in diameter. But no stampings. Could a trans shop test it?

 

Not really, unless it's a really well equipped trans shop.

Put it in and see what happens

 

Minty green? bet it's a stock replacement.

 

Probably not if it is a 10" converter, there is no way to tell unless it is in a car then it is still relative to who built it and what they put in itfor parts. Also 1 converter will be a different stall with 300ftlbs and 500ftlbs.

As far as green the ony ones I have ever seen in green is redneck converters painted some green for a while.
They sell off ebay for what that is worth.

Tim

 

OOPS! Missed the 10" comment=not stock.

 

I have a factory C6 torque converter in my Willys coupe. It is a 351 Cleveland CJ unit that stalls at 2500 RPM - to my knowledge the highest stall C6 converter that Ford ever offered. It is plain steel finish with no markings.

If the converter is in your car, and your brakes are good enough to hold the car still, you can floor the accellerator and watch to see what the RPM stabilizes at. That is the stall speed. The stall speed is somewhat dependent on how much torque your engine produces. A 4000 RPM rated stall converter will stall out at a higher speed than 4000 RPM if your engine is producing more torque than what the converter was designed for and it will stall out at a lower speed if your engine is making less torque than the designed torque input.

 

And, yes, it is a 10" converter case. Most C6s are 12".