Convertor Mods

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HardVG

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Does anybody have details of exactly what is done with the standard torqueflite convertor to increase stall speed?

Turns out one of the machinists at work has some convertor experience so we have opened up the convertor from my 727 that got water in it to clean it out. We can probably make some adjustments while we are in there with the right instructions.
 
really, it costs so little to have a stock converter stall increased, and converter rebuilt. Is it worth risking it?
 
HardVG said:
Does anybody have details of exactly what is done with the standard torqueflite convertor to increase stall speed?

Turns out one of the machinists at work has some convertor experience so we have opened up the convertor from my 727 that got water in it to clean it out. We can probably make some adjustments while we are in there with the right instructions.
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Only if he knows how much to bend them to get the stall you want. The angle and how much the vanes are bent are critical. Too much and it'll do nothing but slip, too little and you will hardly know the difference. How much stall does your engine combo need? What converter do you have now, is it the one with the 1" wide ring gear or the one with the 1/2" ring gear? What was the original application for the converter?
 
The convertor is for an AMC application. If we cant get specific details of the mods required we will just leave it alone. Just looking for a mild stall increase for a relatively stock motor at this stage. It is a bit of a stop gap as I would like to make some mods to the motor down the track (bigger cam) and will buy a purpose built convertor then.

The whole setup is a bit of an unknown at the moment, brought the car as a project, not running and don't have any history on what has and hasn't been done.
 
easiest way to increase the stall speed on a stock convertor is by upping the horsepower output of the motor it is attached to
 
diymirage said:
easiest way to increase the stall speed on a stock convertor is by upping the horsepower output of the motor it is attached to
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Not true. If horsepower is increased at the expense of low end torque, the stall speed could end up lower.
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forphorty said:
Not true. If horsepower is increased at the expense of low end torque, the stall speed could end up lower.
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X2. They don't call them a torque converter for nothing. Lots of Small block Chebies make a lot of horsepower at high rpm, but their torque curve falls off real fast. I always got a kick out of the Chev and Ford small block guys that never understood this. Try and find a 350HP small block chev or a Boss 302 Mustang with a factory installed automatic. 4 speeds only.
 
Are we really going to pretend there is some magical difference between brand X, Y and Z? Like a 350 chevy and a 360 mopar are worlds apart? Come on..

Torque curves are based on how the engine is built, not the badge stamped in it and when you get a torque converter made it's built to match the use and the engine specs. The only thing the badge has to do with it is the carcass it sits in.

And factory installed auto's in 350 chevy vehicles. Millions of them were made. Many of those were in pickup trucks (that require torque)
 
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