Torque Converter Stall Speed Too Low

September 25, 2021 Post a Comment

Lowering the stall speed. Take a look at your engine and torque output and determine if youve got the right stall speed.

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In order to access all of the engines potential power the stall speed must be lowered.

Torque converter stall speed too low. In this case the stall speed is too high it is literally impossible to get the engines full power to the rear wheels. According to BM the stall speed should be rated at about 500-750 rpm under your engines peak torque rpm. If you are unsure about these modifications the experts at RevMax Performance Torque Converters can help.

But both the Ford and Dodge torque converters stall between 2000 and 2500 RPM so with a heavy load the torque converter wont start turning the rear wheels until well beyond the engines torque peak. The horsepower an engine develops will have a dramatic effect on the torque converters stall. Most of the benefit of a big stall comes in takeoff.

This speed allows the margin for application of the torque reserve on takeoff. Automotive torque converters connect an engine to an automatic transmission and multiply engine torque for increased low-speed acceleration. You should get a torque converter built to your specific combination and intentions so the stall speed is correct.

My new high durration cam is causing my carb to idle erraticaly most likely or as what the tech thinks it is my torque converter is too low. Too low a stall torque converter will not benefit the customer. The most versatile converter.

Loose enough to spool most turbos in most elevations and climates while maximizing low end grunt and keeping the torque converter tight enough when the turbo lights and horsepower is created. Conversely too high a stall speed and the engine will wind out at. Conversely the same torque converter will stall at lower speed behind an engine making less low-end torque.

If the stall speed of the torque converter is too low there can be some associated turbo lag or delay until the engine rpm comes up and the turbo starts to build boost. Smooth Idle Stock Compression. This will allow the car to accelerate through the powerband.

Typically engines that produce more low-end torque can actually increase the stall speed of a torque converter to a higher RPM. The aftermarket performance converter that is properly matched to the turbo system will allow for maximum acceleration. In general the desired stall speed should be 500-700 RPM below the engine RPM at peak torque.

Traction is a major factor in considering stall. If the torque converter is faulty it might create unexpected pressures inside the torque converter which can cause rough idling. Converter stall speed must be high enough to put the engine into the torque range where it can most efficiently launch the car.

If converter stall speed is too low the car will be lazy leaving the. This chart is a guideline. If you feel that your idle is a bit jumpy and sometimes too low and sometimes too high it could be a torque converter problem.

On the output side the torque converters turbine is attached to the transmissions input shaft. Faster cars will normally have a higher stall speed especially in a smaller cubic inch engine that doesnt have a lot of torque displacement. The basic rule applies.

Of course the power and torque curves of your engine will have a huge effect on stall speed. An NA torque converter will typically want to be lightweight whereas a power-adder converter will most likely want a heavy cover and anti-ballooning plates and each will have a different stall speed range too. The cam calls for a 2500 rpm stall my car currently has a 2000-2200 stall but can having too low of stall really cause my engine to stall out at.

The car will roll at a lower RPM and may never reach 6000 RPM. Rough idling is another common symptom of a bad torque converter. When selecting stall speed without having prior experience to go by it is better to conservatively estimate the engine torque than it is to over estimate it.

The Ford Power stroke Diesels engine produces so much torque that the factory torque converter stalls as high as 2000 RPM. Most 4x4 trucks run best with low stall converters. I called an Edelbrock carb tech about my car stalling out while in gear and Ive narrowed it down to two things.

Most mild race cars will use between 3500 to 4500 stall speeds on average. Too low a stall speed and the car will bog down at launch. If youre already fighting traction issues fix that before getting a higher stall converter.

Typically the desired brake stall speed would be 500 to 700 RPM below the engine RPM at peak torque. Saturday Night Special Stock to 265 Stock to 323. With a true 3500rpm torque converter stall speed a 3911 gear will be very effective but the same exact converter with a 4561 gear wont stall up as far because of the torque multiplication of the rear gears moves the car easier unless you are using a Trans-Brake also if you have a heavy car the stall speed will be effected.

Our torque converter stall at approximately 1400-1900 RPM which is right at peak torque. This torque converter will increase fuel economy reduce transmission temperature increase low-end power and top-end. In general the stall speed selected for your converter would be 500 to 700 rpm below the peak torque.

If you over estimate your stall speed will be lower than intended which will reduce your torque converters performance. If the user has an application which requires at least 3000 rpm stall and they purchase a 2000 to 2500 rpm stall range converter it will normally not even give them the 2000 rpm stall. What does a torque converter do.

With a low stall speed. The converter housing bolts to the flexplate and spins at the same speed as the engine. The higher the stall of the converter the less traction you will feel like you have.

Your stall speed MAY vary in your specific application. This is true for a 3000 RPM converter. It will act very similar.

Street Rodder Stock to 260 Stock to 323.

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