New toys showed up today!!
Ya, basically it controls the rpm at which the transmission starts moving you. The higher the RPM, the more torque you have available to help you get going quickly.
Think about it this way. Say you have a manual transmission instead. From a stand still, if you want to accelerate very quickly, is it better to let the clutch out at 500 rpm, or 2500 rpm. The answer is, for faster off-line starts, you let the clutch out at a higher rpm. That way, you are in a better powerband immediatly. This is what the RPM of the stall/torque converter does for you. With a lower stall (like the stock stall converter which is around 1200-1400), you start out at a really low rpm, so you are not immediatly in the ideal powerband for quick acceleration.
That's the benefit. The main negative is heat, as mentioned earlier in this thread. High stall converters are trying to convert more rpm (which means more power or energy forces) to the driveshaft, so the result is faster and higher heat generation. A stock converter is handling much lower RPM's, so much less power and enrgy forces involved, so there is less heat. I figure I can handle a higher stall converter though since I have an oversized aux trans cooler, and an extra capacity pan to help with cooling off that heat. Another negative is that you might see a decline in fuel economy, mainly in town stop/go driving.
One thing I am not sure about is if the torque converter with a higher stall will impact cruising rpms? I don't think it would, but I have not been able to get an answer to that yet. Anyone know?
Think about it this way. Say you have a manual transmission instead. From a stand still, if you want to accelerate very quickly, is it better to let the clutch out at 500 rpm, or 2500 rpm. The answer is, for faster off-line starts, you let the clutch out at a higher rpm. That way, you are in a better powerband immediatly. This is what the RPM of the stall/torque converter does for you. With a lower stall (like the stock stall converter which is around 1200-1400), you start out at a really low rpm, so you are not immediatly in the ideal powerband for quick acceleration.
That's the benefit. The main negative is heat, as mentioned earlier in this thread. High stall converters are trying to convert more rpm (which means more power or energy forces) to the driveshaft, so the result is faster and higher heat generation. A stock converter is handling much lower RPM's, so much less power and enrgy forces involved, so there is less heat. I figure I can handle a higher stall converter though since I have an oversized aux trans cooler, and an extra capacity pan to help with cooling off that heat. Another negative is that you might see a decline in fuel economy, mainly in town stop/go driving.
One thing I am not sure about is if the torque converter with a higher stall will impact cruising rpms? I don't think it would, but I have not been able to get an answer to that yet. Anyone know?
awesome..thanks steve and silver.. this sounds interesting.. especially for guys that run CTD's .. would be beneficiall to have a lower stall then stock since the peak tq or a 5.9 L ctd is lower then what the factor stall is .. this is interesting another thing to add to the mod list.. good time to put in a shift kit too...
Are those power and heated?
Simplist of terms your engine is an air pump powered fluid pump
Jet ski with wheels 
Its amazing that a fan pushing fluid towards other fans/turbines/impellars is powerfull enough to move so many thousands of lbs so quickly.
Simplist of terms your engine is an air pump powered fluid pump
Jet ski with wheels 
Its amazing that a fan pushing fluid towards other fans/turbines/impellars is powerfull enough to move so many thousands of lbs so quickly.
They are not power or heated. As far as I know they dont make the power and heated tow mirros for the 2nd generation dodges.
ORIGINAL: RM_Indy
Are those power and heated?
Simplist of terms your engine is an air pump powered fluid pump
Jet ski with wheels 
Its amazing that a fan pushing fluid towards other fans/turbines/impellars is powerfull enough to move so many thousands of lbs so quickly.
Are those power and heated?
Simplist of terms your engine is an air pump powered fluid pump
Jet ski with wheels 
Its amazing that a fan pushing fluid towards other fans/turbines/impellars is powerfull enough to move so many thousands of lbs so quickly.
one thing to keep in mind as far as the stall speed goes... if you put a converter in your truck with a high stall speed (say like 2500 rpm), and try to go wheeling, or to move at a slow speed, you will have issues and hate it. while wheeling, generally youre moving very slowly, and the converter will keep waiting until you get the rpms up high before it transfers power. this will make for a very jerky ride and will also lead to many more broken/snapped parts.



