FACTORY STALL SPEED?

[olds307 and 403]

I agree, had a cheap one come apart at the track. Factory low performance V8 stall is around 1400 to 1800 rpm. I have heard good things about the Coan street convertor. I am probably going CK performance for mine since it is for a TH2004r.

 

[martin.ca]

So... if when testing stall speed (briefly of course), and the engine revs higher than the stall rating (than what you were expecting), what's slipping?

 

[DoubleV]

So... if when testing stall speed (briefly of course), and the engine revs higher than the stall rating (than what you were expecting), what's slipping?

I would do an internet search and read up about how a converter works. You should be able to find any and all info pertaining to converters/stall speeds. But just to get your brain going; a converter is always slipping. It slips alot below it's stall speed but once you reach it it still slips, just very little. The only time a converter doesn't have any slippage at all is when it's locked up ( if it's a transmission and converter with a lockup function ). A shitty converter will slip alot more than a quality one.

 

[martin.ca]

So... if when testing stall speed (briefly of course), and the engine revs higher than the stall rating (than what you were expecting), what's slipping?

I would do an internet search and read up about how a converter works. You should be able to find any and all info pertaining to converters/stall speeds. But just to get your brain going; a converter is always slipping. It slips alot below it's stall speed but once you reach it it still slips, just very little. The only time a converter doesn't have any slippage at all is when it's locked up ( if it's a transmission and converter with a lockup function ). A shitty converter will slip alot more than a quality one.

Thanks. I know how a converter works, I was asking what could be happening if the tested speed is seemingly higher than it should be.

https://www.youtube.com/watch?v=xm8EHTTNPEg

 

[DoubleV]

If you're saying that if you had a converter in a car and you know it has always stalled at a particular RPM but then starts to stall higher than that, then I would assume some bent/broken fins in the converter.

If you're saying you want to know why a converter rated at X stall will sometimes actually stall higher than that, then that's just a function of how much load is placed on the converter. So a converter rated at 2500 will only do so with a certain amount of load applied to it. That same converter might stall at 3000 with less load ( like a torquey big block ). That's my understanding of it.

 

[martin.ca]

Okay, So I'm guessing my converter's probably on the high range of stock ~2100+

 

[bisketto]

soooo.....turns out i have a th350C.....boy do i feel foolish. No wonder the converter I bought doesn't work.... 😳

 

[DRIVEN]

Shouldn't be too hard to find a good TH350 to put behind the new converter.

 

[bisketto]

I just put the factory converter back in for now, drives amazing as is and loves to get sideways (South Dakota winters and snow tires are a RWD dream haha)

 

[bisketto]

hughes 2500 stall ordered today, i'll be doing one wheel burn outs all summer long!