Can someone tell me what a troque converter is? And what is a stall and what the advantages are of having a higher/lower stall rate? Thanks!

 

You might want to ask this on the tranny board. From my understanding, a TC will multiply the torque of your motor that reaches the ground. You want to have a stall speed that matches the torque of your motor. TCs are given stall speeds but can vary a little because it is impossible to measure true stall speed. You'll get better acceleration with a higher stall speed as long as it is matched to your motor output. I believe the higher you go the less your mpg will be to an extent. I think for a daily driver you don't want to go over 2800rpm stall, but that might even be high, I can't really recall.

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"Putting any amount of money into a RICE BURNER is like wiping your a$$ with a turd. "
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Here's the run down...

The TC allows for the back tires to not be moving, but the engine still be running, and the car be in gear.

Imagine two fans, one placed right in front of another one. Now, turn one fan on, and the air from the first one will turn the blades of the second one. That's basically how a TC works, except one "fan" is inside the other one. (Like a donuthole inside of a donut. heh) One fan is connected to the engine, and the other one is connected to the tranny, and instead of air, it uses tranny fluid. If the first fan is moving slow enough, it doesn't churn the tranny fluid up enough to force the second fan to turn. Imagine moving your hand through water very slowly, and then again very quickly. The RPM's the engine has to turn to make the second fan move is referred to as the stall speed. I think the stock stall speed is somewhere around 1800rpm's.

Why the different stall speeds? Well... Most engines don't put out peak torque/hp around 1800rpm's. The higher the stall speed, the higher you can rev up your engine, and if you can do that, then you can put more power to the tires the instant they start turning. (Makes for quicker starts.)

TC lockup? Well... since the only coupling of the fans are a liquid, some power is lost in the process, a lot of it as heat. So, they put a clutch inside the TC. When it engages, there's a solid connection between the engine and transmission. When it locks up it's almost like another gear -- the RPM's drop a few hundred. When you tap the brake, it disengages, so the car doesn't stall when you come to a stop.

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89 iroc-z 305 tbi
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