I just switched from a TH200c to a TH350 w/ a 3200ish stall and I have a few questions. First off I am trying to get used to driving with such a high stall converter and am wondering if my stall and trans is acting right. I now there is alot more slip now but I am turning like 2000 RPMs really quick. The car will start moving right away but it seems the rpms need to be higher than 2000 rpms before any substantial movement happens. Is that normal? Also, how high should I be able to footbrake the stall too? I can get it al the way to like 2800 before the tires start spinning. That seems high because I heard you can't get a stall to footbrake anyway near the rated stall speed.

 

The converter sounds like its working correctly to me. The brake stall speed will almost always be lower than the advertised stall speed. I'm sure the flash stall, launch from idle, will be closer to 3200.

 

Stall speed is when the turbine and the impeller are at the same speed. Below the stall speed and the converter slips. Above the stall speed and there's a very minimal slip. Anything under 10% is considered good.

My converter stalls at 6000 rpm. I stage at an idle and the car just barely moves forward when staging. There's an incline into my garage and I need to bring the rpms up to drive up the incline. I never checked but the rpms probably stay below 2500 rpm.

The idea of a high stall converter is to allow the engine rpms to climb quickly under load to get into the powerband quicker. At low speeds when not under load, the rpms will stay at a lower range.

A converter that's rated at 3200 is only a ballpark figure. The stall speed depends on how much torque is put into it. A converter that stalls at 3200 behind your engine may stall at 3000 or 3400 behind another. If you can bring up the rpms to 2800 foot braking, that's pretty good.

The stall speed should be matched to the camshaft. What's the cam's advertised duration? Too high a stall speed can be just as bad as too low. The only way to know the true stall speed is with a transbrake.

 

Alright it sounds likemy stall is working correctly. This is my first one so I wanted to be sure. The cam is a XE284-10 so 240/246 IIRC.