Transmissions and Drivetrain Need help with your trans? Problems with your axle?

Stall Converters?

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Old Jun 30, 2006 | 10:16 PM
  #1  
JimmyDavidson's Avatar
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Joined: Apr 2006
Posts: 258
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From: Manchester, TN
Car: 1984 Camaro z28/SC
Engine: 355
Transmission: T56
Axle/Gears: 9bolt 3.89
Stall Converters?

Ok now I'm trying to learn about stall converters. I've looked at FaQs and stuff about them but they don't seem to be answering the questions I want to know.

What exactly does a torque converter do? With a 2400 Stall Converter, does that mean you have to rev up to 2400 to get it to start moving?

I read somewhere that the stall converter lets the transmission turn(I dont know what you'd call it, does that mean when the converter locks up?) when there is enough torque to get the car moving. If so than why would you need a stall way over your idling speed. Say if it was idling at 750 rpm why would you need a 2400 stall(other than drag racing of course)? Wouldn't you get the same effects with an 1800 stall? Hmm I don't really know how to explain what I'm saying... but I hope you understand what I'm getting at. That you would still get a little bit of torque at 1800 instead of having to wait to 2400 to get that little bit of torque. Like I said on a drag strip I could see why you would need that high of a stall, but not on the streets. Could someone explain please?

Like I said just trying to learn, please dont flame.
Thanks.
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Old Jun 30, 2006 | 11:03 PM
  #2  
AlkyIROC's Avatar
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From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
http://www.hardtail.com/techtips/torqueconverters.html
http://www.hardtail.com/techtips/sel...converter.html
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Old Jul 3, 2006 | 01:25 PM
  #3  
Shagwell's Avatar
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From: Southwest Florida
Car: projects.......
even a 5000 stall will allow you to take off normal(basically). It's when you stomp the pedal that it will "flash" up to the stall speed. Also, when you have a larger cam/higher powered motor, higher stall speeds allow the engine to idle properly, meaning minimal load against the engine while stopped in gear.
Higher stall speed allows the motor to get to its power band before having to move the car, thus making it faster.
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Old Jul 3, 2006 | 04:01 PM
  #4  
mw66nova's Avatar
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From: Harford County, MD
Car: camaro sportcoupe
Engine: 7.0L
Transmission: G-Force GF5R
Axle/Gears: Moser 9"
yep. i've got a 4000 rpm stall speed converter in my car. it acts just like stock putting around town, but when i stomp on it, the rpms go right to 4000 instead of staying at where it is and then climbing. it gets the motor instantly into the powerband and helps get the power to the ground faster.
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