2007-01-09 21:55:39 · 3 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
I own a transmission shop, and I will try to answer your question in terms that will make sense. Stall does not mean what most people assumes it does. In short, it means at what RPM the engine would stall, if it could no pull the weight. If you placed your vehicle against a brick wall, and the rear wheels could not spin when you floor the accelerator, the RPM it reaches when the engine stops runnning gives you the stall of the converter. If you installed a stock converter in your vehicle, the stall on it is around 1,200-1,800 RPM. The vehicles torque converter is in full maximum pull by that RPM. Installing a stall converter into your vehicle can help in applications where the engine must idle at a higher RPM due to a high lift cam being in the engine. If you have a cam in your vehicle that has a power band of say 2,500-5,500 RPM, installing a stall converter of 2,500-3,000 RPM will get the engine within your power band of the cam shaft. The result will be a vehicle that is making all, or most all the torque the engine can right out of the gate, instead of moving 50 feet and then reaching the torque/horsepower band. If you read the information supplied with most aftermarket cam's, its easy to see, the engine will have to have a much higher idle speed. An example would be most cam manufactures has a minimum RPM for a particular grind on a cam shaft. Normal idle speed may be 850-950 RPM, but the engine will have such a radical idle at 950 that it won't keep running without stalling, and the engine doen't smooth out any until it reaches 1,200 RPM. A stock stall converter is already pulling the wheels by this RPM, and burning the clutches in the transmission if its not allowed to move the vehicle. Along with every aftermarket cam comes an instruction sheet that will suggest what stall your converter needs to be.
Glad I could help you, Good Luck!!!
2007-01-09 22:37:44 · answer #1 · answered by Anonymous · 0⤊ 0⤋
It lets your motor rev higher before actually moving the car. This is a good thing for cam-ed out cars that have no power off idle but piles of power over 3000 rpm's.
2007-01-09 22:33:17 · answer #2 · answered by king_davis13 7 · 1⤊ 1⤋
Once you understand how they work it will make since.
2007-01-09 22:21:24 · answer #3 · answered by Anonymous · 0⤊ 2⤋