How a stall converter wor

You should upgrade or use an alternative browser. Thread starter bnpimpn Start date Nov 17, The enguagement is gradual, between idle and peak stall it enguages quite liunearly until it can't slip any more. Check out www. I had my stock converter Re-stalled by IPT, it now has a high stall setting of rpm. When a High stall torque converter is made properly, such as my IPT unit, daily driving on it is just like stock.

There is no lag for it to engage, gear shifts are like stock. Basically to answer your question, If you got in my car and went for a drive, you wouldn't even know there was a performance high stall Tq converter in the car. That is until you pull up to a light next to a kid revving his car at you. Then you simply mash the brake to the floor with your left foot and a few seconds before the light changes mash the gas. My car will build almost 20psi on the line brake boosting before I have to launch because the car will pull through my brakes at that point.

Don't brake boost all the time you'll just shorten the life of your trans. Mirage1 Proven Member. They covered it perfectly. Here is a write-up from John at IPT fully explaining torque converters and high-stall torque converters.

Torque Converters Explained. ETalon95 Proven Member. So what RPM does the high stall converter allow you launch at? ETalon95 said:. Click to expand Simply put: In an automatic, you put the car in drive and keep your foot on the brake. It doesn't move.

If you keep pressing the gas pedal, the rpm will go up until it reaches a point in which the torque converter is grabbing too hard for the brakes to hold. This is the stall speed. A higher stall speed means you can put the car in drive, keep your foot firmly pressed on the brake, and bring the engine rpm up higher before the car begins to move. Stall speed has nothing to do with how quickly or slowly it engages.

This is good for better launches by putting the engine up higher in an rpm range that is providing more horsepower. So if you have an engine and turbo that doesn't build good boost until 3, rpm, then a 3, rpm stall torque converter would be good for getting strong launches. On the flipside, if you have a fwd car that spins its tires off the line as it is, then a higher stall torque converter would be useless.

For the hotter cars that have bigger cams, then a RPM converter is better. The rule of thumb is if the engine is coming alive at RPM then you want a converter with about stall to it. Many people will tend to over cam and carburet their cars, and those people under stall which sucks. To choose the right torque converter for your vehicle the stock parts and any alterations and additions should be considered.

This will help pair up the power, transmission, and all variables with the right torque converter that has the proper stall speed for your set up. We specialize in building custom highly specialized torque converters for all applications. We manufacture them for race, towing, and even higher MPG applications. Whenever you install a higher stall converter, be sure you use some sort of an external tranny cooler. When you are "stalling out" your converter, such as being at the line at the drag strip ready to launch, they build up a LOT of heat from hydraulic friction.

That heat is what cooks tranny's, so you need a good cooler. Once you know where your engine makes good torque, RPM , you can use that number to determine what size of a stall converter to go with that best suits your needs. It really isn't rocket science. For the best deals on your performance parts and accessories with the best service, choose where I order all of my components from Competition Products!

What can a high stall converter do for you? Site Map. About Us. Furthermore, determining which stall converter to install is not exact science. A 3, RPM converter can be installed without seeing a 2, RPM stall if there is not enough torque provided by the engine.

Meanwhile, if you install the 3, RPM converter in a vehicle with a big block engine with massive torque, you may get more like 4, RPM stall. The amount of raw torque created by the engine will be a big determining factor. The stall converter enables a vehicle to use its torque curve for launching off the line stronger and better compared to a vehicle with a lower stall. To get a better idea, look at dyno sheets and compare race and performance engines, its easy to tell they build power and torque at a higher RPM, which is why stall converters are critical parts.

Therefore, to launch hard form the line as possible, you would not want to install a 3, RPM stall converter into a car with peak torque at 5, RPM. If installing a stock 1, RPM stall converter in the same race engine, it would fail right away due to the converter getting locked up at a low RPM.

This causes the full engine load to stall at 1,RPM, which the engine would not create the desired power at this RPM.