2500 stall that stalls @ 1800 crappy
 

I just got a B&M 2400 hole shot stall. it stalls at 1600 to 1800. I called B&M and they said that it was because my cam. RIGHT. And they said that my car didnt have the torque. if a 150 shot of nitrous cant give me the torque than what will. if that is right please tell me If not they are getting another call But I will not be very nice to them this time. but no matter what that sucks *****

thanks
Brad

They are right, the power output of your engine affects the stall speed of the converter.

It is cause of your cam. it raised your torque curve up so that at where the converter should stall it's not making enough torque to do so.


call them up and tell them your combo and ask them which torque converter they recommend for what you want.

Yup the motor will effect the way the converter stalls too! When I put my converter in it stalled at about 2600-2800 rpms, now that I have done some more motor work it stalls at 3000-3100 rpms. When you say it stalls at 1600-1800 rpms, is that flash stall speed or with light acceleration? Converters will stall at lower rpms under partial throttle, but when you flash the converter the stall speed raises closer to its advertised rpm.

Not only does the engine torque/power affect the stall, but stall is also affected by how you're measuring it. If you're simply brake-torquing it, you won't even be close. The best way to determine 'true' stall is to bring the car up on the transbrake. At this point, the transmission is essentially locked (acting as a true engine brake) and the true converter stall will be revealed by the peak engine RPM at WOT. To see how much 'flash' is obtained when you're coming off the transbrake, you really need both engine and driveshaft RPM (like from an Autometer Ultimate Tach) so that you can discern engine rotation versus driveline rotation.

Don't blame B&M. They advertise a particular stall speed based on a baseline engine performance (TQ & HP). Now if you sent them your engine dyno curves and the stall speed was off by 1000rpm, then I'd say you've got something to complain about.