LukePhillips

iTrader: (2)

Ive never owned an automatic worth a damn so Ive never had a clue about those funny looking stall converters. I have an 03 Silverado 5.3 and Im looking for something a little mild, but enough to make a decent difference.


I'd say what I think stalls do, but Im sure Im way off so I wont even waste my time. Any help/links are appreciated!

bgray

iTrader: (2)

alright..basically a stall enables a automatic transmission to slip to a certain rpm..like reving it in neutral like a manual.

good streetable stall goes from anywhere to 2000-3000..alot of guys are running 3000 stalls around here with a big cam...if you want something mild meet half way with a 2600. Also recommend getting a mild cam if your gonna be doing a stall...performance will leap bounds.

TXsilverado

iTrader: (19)

2600 is a very mild stall. i have one and recomend atleast a 3000. 2600 acts too stock for me.

NBred94

Another relevant issue is heat. With the increased "slip" inherent in a higher stall speed, you will generate more trans killing temps, so an external cooler (or a bigger one) is usually recommended. This goes double if you tow with your truck. Generally, all else being equal, higher stall speeds = higher temps.

LukePhillips

iTrader: (2)

So it basically makes the car idle higher? Or can you still run it at stock rpm's while dd'ing it.

KY_BOB

iTrader: (2)

Idle isn't changed. On acceleration it will allow the engine to spin up to a higher rpm before pulling. At the higher rpm, the engine is making more power, thus a stronger launch.

Make since?

NBred94

Cruising down the highway will not change either. When the converter locks up, the fluid coupling changes to a mechanical link, so changing the stall speed only makes a difference during acceleration or at lower speeds/gears where the converter is unlocked.

Silver-Dollar

iTrader: (1)

A torque converter is a fluid coupling/pump linking the engine to the transmission. The higher the stall speed, the more the engine builds rpms before applying pressure to engage the transmission (driveline). Every torque converter has a stall speed. That is why, in an automatic, while in gear, the vehicle does not stall out when you come to a complete stop.

RandomHero

iTrader: (24)

think of it like a mac truck you hear on the road. When it's at a stoplight and the light turns green, you hear its engine acccelerate but it doesn't go anywhere until a certain rpm is acheived. A stall is just like this. Under mild acceleration it won't go to it's rated rpms(lets say a 3k stall) it might go to 2200 before you feel your truck start to move.

86MC_SS

iTrader: (3)

http://auto.howstuffworks.com/torque-converter.htm