Stall Speed on torque converter, wtf?
#1
Thread Starter
Stall Speed on torque converter, wtf?
Ok, I just want to clarify what the "stall speed" really is as I always hear people (automatic domestics) talk about it.
This is what I think it is, correct me if I'm wrong please:
You brake your car (so it will not move), while locking the brakes you give it throttle so the rpms go up (but the car does not move) unitl the "stall speed" RPM. After that point the car will stall out.
The advantage is that you can "launch" an automatic car at a higher rpm giving a better start?
I'm just curious.
This is what I think it is, correct me if I'm wrong please:
You brake your car (so it will not move), while locking the brakes you give it throttle so the rpms go up (but the car does not move) unitl the "stall speed" RPM. After that point the car will stall out.
The advantage is that you can "launch" an automatic car at a higher rpm giving a better start?
I'm just curious.
#2
Registered User
You're mostly right; an automatic transmission's stall speed is the rpm the engine will settle at if you depress the gas and brake hard simultaneously. The car won't stall if this happens, though; the engine will just hit a certain rpm and stay there.
#5
Thread Starter
Originally Posted by PedalFaster,Feb 1 2007, 12:58 AM
You're mostly right; an automatic transmission's stall speed is the rpm the engine will settle at if you depress the gas and brake hard simultaneously. The car won't stall if this happens, though; the engine will just hit a certain rpm and stay there.
#7
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Originally Posted by Spec_Ops2087,Feb 1 2007, 12:48 AM
Ok, I just want to clarify what the "stall speed" really is as I always hear people (automatic domestics) talk about it.
This is what I think it is, correct me if I'm wrong please:
You brake your car (so it will not move), while locking the brakes you give it throttle so the rpms go up (but the car does not move) unitl the "stall speed" RPM. After that point the car will stall out.
The advantage is that you can "launch" an automatic car at a higher rpm giving a better start?
I'm just curious.
This is what I think it is, correct me if I'm wrong please:
You brake your car (so it will not move), while locking the brakes you give it throttle so the rpms go up (but the car does not move) unitl the "stall speed" RPM. After that point the car will stall out.
The advantage is that you can "launch" an automatic car at a higher rpm giving a better start?
I'm just curious.
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#9
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Originally Posted by PedalFaster,Feb 1 2007, 11:22 PM
Huh?
With the transbrake you just floor the gas kind of like a 2-step.
"Activated by electrical solenoid control, a trans-brake simultaneously engages the first and reverse gears, locking the transmission and preventing the input shaft from turning. This allows the driver of the car to raise the engine rpm against the resistance of the torque converter, then launch the car by simply releasing the trans-brake switch."
#10
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Sounds to me like he was describing a good old-fashioned brake stand -- depressing the gas and brake at the same time, without the use of any fancy electrical solenoid control-type gadgets.