What is the stock stall rpm?
08-20-2005, 06:34 PM
#5
Burning Brakes
Thread Starter
Maybe you did not understand my question...There is a converter in the transmission that is set to a specified rpm speed( the car will not go until you hit the gas and reach that rpm, and then the combined torque of that rpm level pulls the car from a stop. This is only in an automatic car ...Im looking for the stock rpm that the converter stalls at. Does anyone know if the C6 stall speed is the same as the C5 stall speed? If the stall is higher, that would mean that the car wont go right away from just hitting the gas...but when it goes the car higher stall speed will build up the torque level and you will launch with more torque....if the stall is low, then the car just goes as soon as you hit the pedal. And there is less torque...so ideally a higher speed is better. So does anyone know the figure?
08-20-2005, 07:46 PM
#6
Originally Posted by mark b
Maybe you did not understand my question...There is a converter in the transmission that is set to a specified rpm speed( the car will not go until you hit the gas and reach that rpm, and then the combined torque of that rpm level pulls the car from a stop.
This is only in an automatic car ...Im looking for the stock rpm that the converter stalls at. Does anyone know if the C6 stall speed is the same as the C5 stall speed? If the stall is higher, that would mean that the car wont go right away from just hitting the gas...but when it goes the car higher stall speed will build up the torque level and you will launch with more torque....if the stall is low, then the car just goes as soon as you hit the pedal. And there is less torque...so ideally a higher speed is better. So does anyone know the figure?
Now to directly answer your question, the stall RPM of the stock 4L65E converter is 2300 RPM, same as the stock 4L60E used in the C5.
08-20-2005, 10:30 PM
#7
Originally Posted by shopdog
No, that's not how a torque converter works. Your car will pull away from a stop at idle assuming you aren't on a steep hill. Stall speed is the lowest RPM at which the converter has a 1:1 effective gear ratio. Below stall, it has a higher effective gear ratio, up to about 2:1 at idle RPM. This, along with fluid shear/slip, is why an automatic doesn't need a clutch to start off from a stop.
A higher stall speed can be benefical, to a drag car. That's because it allows the engine to get up into a fatter part of the engine torque curve before applying full first gear load to it. But it makes a car unpleasant to drive on the street, and hurts fuel economy.
Now to directly answer your question, the stall RPM of the stock 4L65E converter is 2300 RPM, same as the stock 4L60E used in the C5.
A higher stall speed can be benefical, to a drag car. That's because it allows the engine to get up into a fatter part of the engine torque curve before applying full first gear load to it. But it makes a car unpleasant to drive on the street, and hurts fuel economy.
Now to directly answer your question, the stall RPM of the stock 4L65E converter is 2300 RPM, same as the stock 4L60E used in the C5.
Agree with everything, but somewhat confused by the last paragraph.
The stock stall converter in a C5 with a 4L60E is widely stated as 1600 RPM. The old Yank site used to show a comparison and 1600 RPM was stated there as well. A search in the C5 forums will show this to be the consensus there as well.
I had a 2400-2600 stall converter in my C5 and I know for a fact that it stalled at well more than 100 RPM above stock.
08-22-2005, 10:17 AM
#8
Burning Brakes
Thread Starter
Originally Posted by shopdog
No, that's not how a torque converter works. Your car will pull away from a stop at idle assuming you aren't on a steep hill. Stall speed is the lowest RPM at which the converter has a 1:1 effective gear ratio. Below stall, it has a higher effective gear ratio, up to about 2:1 at idle RPM. This, along with fluid shear/slip, is why an automatic doesn't need a clutch to start off from a stop.
A higher stall speed can be benefical, to a drag car. That's because it allows the engine to get up into a fatter part of the engine torque curve before applying full first gear load to it. But it makes a car unpleasant to drive on the street, and hurts fuel economy.
Now to directly answer your question, the stall RPM of the stock 4L65E converter is 2300 RPM, same as the stock 4L60E used in the C5.
A higher stall speed can be benefical, to a drag car. That's because it allows the engine to get up into a fatter part of the engine torque curve before applying full first gear load to it. But it makes a car unpleasant to drive on the street, and hurts fuel economy.
Now to directly answer your question, the stall RPM of the stock 4L65E converter is 2300 RPM, same as the stock 4L60E used in the C5.
08-23-2005, 11:55 AM
#9
Safety Car
Originally Posted by EB20003
The stock stall converter in a C5 with a 4L60E is widely stated as 1600 RPM. The old Yank site used to show a comparison and 1600 RPM was stated there as well. A search in the C5 forums will show this to be the consensus there as well.
2300 rpm would be a very high stall speed for a stock converter. 
Ed
08-23-2005, 01:35 PM
#10
Burning Brakes
Originally Posted by mark b
Does anyone know the stock torque convrter stall speed? Thanks
08-23-2005, 01:52 PM
#11
Originally Posted by C5XTASY
2300 rpm would be a very high stall speed for a stock converter. Ed
