Torque Converter Talk

[Mark Kovalsky]

You're not reading what I'm writing. I said tire size should not affect torque converter speed ratio choice.

The torque converter speed ratio should be selected solely based on the engine's torque curve. Tire size has nothing to do with the engine's torque curve.

Where did you get the strange notion that I said tire size doesn't affect driveability? That's doesn't make sense.

 

[Mark Kovalsky]

Stall speed can only be rated for a given engine torque curve.

If a torque converter stalls at 2000 RPM with a stock engine, that same converter will stall at a higher RPM when it is behind an engine that produces more torque.

The auto manufacturers use a complicated formula that I can't remember to come up with a k factor for the torque converter. This k factor is a better way of relating the torque converter characteristics and how that converter will act behind different output engines. The aftermarket seems to like stall speed probably because it is easier to understand. You really can't find the torque converter k factor without using a torque converter dynamometer.

 

[kingranchstroker]

Stall speed can only be rated for a given engine torque curve.

If a torque converter stalls at 2000 RPM with a stock engine, that same converter will stall at a higher RPM when it is behind an engine that produces more torque.

The auto manufacturers use a complicated formula that I can't remember to come up with a k factor for the torque converter. This k factor is a better way of relating the torque converter characteristics and how that converter will act behind different output engines. The aftermarket seems to like stall speed probably because it is easier to understand. You really can't find the torque converter k factor without using a torque converter dynamometer.

Exactly. I talked to Precision Industries when i bought mine. And it is said to be a 1600 rpm stall converter but put behind my engine it stalls at just under 2200. So what Mark is saying is definitely correct... coming from him and from PI. Just my 2 cents :thumbsup:

 

[Pizza pig]

Stall speed can only be rated for a given engine torque curve.

If a torque converter stalls at 2000 RPM with a stock engine, that same converter will stall at a higher RPM when it is behind an engine that produces more torque.

The auto manufacturers use a complicated formula that I can't remember to come up with a k factor for the torque converter. This k factor is a better way of relating the torque converter characteristics and how that converter will act behind different output engines. The aftermarket seems to like stall speed probably because it is easier to understand. You really can't find the torque converter k factor without using a torque converter dynamometer.

Exactly. I talked to Precision Industries when i bought mine. And it is said to be a 1600 rpm stall converter but put behind my engine it stalls at just under 2200. So what Mark is saying is definitely correct... coming from him and from PI. Just my 2 cents :thumbsup:

seems like a bunch of he said she said.... well thats a bit different than whats going on huh? looks like im going to have to go to my bullpen... aw sheet.