2500 stall that stalls @ 1800 crappy

12-11-2002, 08:28 PM

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

Comatose · 12-11-2002, 09:04 PM

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

lx mike · 12-12-2002, 07:09 AM

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.

HiFlow5 0 · 12-12-2002, 07:20 AM

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.

Jeff Chambers · 12-12-2002, 07:36 AM

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.

12-11-2002, 08:28 PM	#1
801mustang Guest Posts: n/a	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

12-11-2002, 09:04 PM	#2
Comatose Registered Member Join Date: Oct 2001 Location: Goldendale, WA, USA Posts: 84	They are right, the power output of your engine affects the stall speed of the converter. __________________ Jeremiah 1986 Mustang GT K&N Filter, Removed Air Silencer, Black Magic Fan, 65mm Explorer TB, 110lph BBK Fuel Pump, F/M Force II Cat -Back, O/R h-pipe, U/D's Timing@14* 1986 Mustang LX SSP--new project car AOD, 3.27's, Dumps, 238k miles

12-12-2002, 07:09 AM	#3
lx mike Undescribable Join Date: Sep 1998 Location: Ft Myers Fla Posts: 1,539	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. __________________ Rice Haters Club Member #101

12-12-2002, 07:20 AM	#4
HiFlow5 0 Registered Member Join Date: Mar 2000 Location: Springfield, Ma, usa Posts: 706	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. __________________ NewEngland Auto www.baystategearheads.com -91 Mustang Coupe, ex 4cyl (sold) -99 F150, 3" lift, 35" Procomps, Magnaflow exhaust

12-12-2002, 07:36 AM	#5
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	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. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"

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