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Old 10-11-2010, 01:25 PM   #1
olds307 and 403
 
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Default Torque converter stall speed?

Okay, I have a generic 2000-2600 stall converter. I tried the one foot on gas and brake and would maybe get 2000 before wheel spin. Someone mentioned that was a poor way to measure stall. I went out and hammered the gas from a stop, no brakes. The tach went up to 2400 rpm and starting spinning and kept spinning past 4000 rpm. Repeated and again instantly went up to 2400. Is my stall speed 2400 rpm?
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Old 10-11-2010, 01:43 PM   #2
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Default Re: Torque converter stall speed?

Your converter flash point is 2400rpm. Its probably a bit less than that, you would need to get the car to hook up completely. Once the tires break loose, you cant expect any of the readings(rpm,mph) to be correct

It should be very close to your "stall" speed. About the only way to check your stall rpm would be to install a trans-brake and find out

Also, if you change the engine combonation, the stall speed of the converter will most likely change, depending on the torque curve of the reworked motor
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Old 10-12-2010, 08:25 AM   #3
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Default Re: Torque converter stall speed?

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Old 10-12-2010, 09:25 AM   #4
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Default Re: Torque converter stall speed?

Thank you. I figured with the torque this motor puts down, there no way I would be at the bottom of the scale. I would bet my flash point is right near peak torque. I have a chance at a 3000 stall lock up converter for cheap. He says it is tight on the street, usually stalls at around my flash point. But when he pushed it, would hit 3000 rpm. Would I gain anything at the track with my mild combo? Lose anything?
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Old 10-12-2010, 02:05 PM   #5
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Default Re: Torque converter stall speed?

Also things like grip (tire width) and vehicle weight come into play here too....

If you got wide meats and a heavy car, your existing converter will flash higher before the car moves or you start to burn out.
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Old 10-12-2010, 07:12 PM   #6
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Default Re: Torque converter stall speed?

There is no way of knowing how this other converter will re-act in your car with out installing it and driving the car.

Does you current trans have lock-up, I dont believe the two(lock-up/non-lock-up) are interchangeable, but Im no trans expert.
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Old 10-12-2010, 08:18 PM   #7
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Default Re: Torque converter stall speed?

Both lock up. P245/60R14 tires in back and car weighs nearly 3700 pounds. I will probably leave the converter as is, considering it is stalling about where I want it.
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