What stall speed converter do I need?

What stall speed converter do I need?

When choosing the stall speed that is right for your application, a rule of thumb is that the advertised stall speed will need to be at least 500 rpm higher than the beginning of the camshaft’s powerband. All aftermarket camshafts are delivered with a recommended RPM operating range.

How do I choose a torque converter stall speed?

Ideally you want the stall to lock up somewhere close to the peak torque of the engine. Typically engines that produce more low-end torque will increase the stall speed. The same converter will stall at a lower rpm behind a less torquey – higher rpm engine.

Is a 3000 stall Streetable?

Most of the “daily driven” street cars we build have anything from 2,400 on up to a 3,500 stall converters in them and they are very streetable with no problems. Just because a stall converter may have a 3,000 RPM rated stall does NOT mean the car won’t move until it revs to 3,000 RPM.

What does a 3000 stall converter do?

Vehicles That Need High Stall Torque Converters The car will roll at a lower RPM and may never reach 6000 RPM. This is true for a 3000 RPM converter. Most mild race cars will use between 3500 to 4500 stall speeds on average.

What does a 2500 stall converter do?

With that, if you take a car with a 2,500 RPM stall converter and you hold your foot on the brake hard, and hit the gas at the same time, (as if you were going to power brake), the “general” RPM in which the tires will break loose is at “about” 2,500 RPM.

How do you know if you need a stall converter?

When the torque converter starts malfunctioning, you may feel shuddering and even slipping in overdrive. You usually notice your car shuddering because it feels like it’s vibrating. Your car will vibrate even when you’re not going very fast. The shuddering makes the car lag and is very noticeable.

What is a good street stall converter?

Generally, a 2,000 or 2,400-stall converter is a good choice for advertised cam durations up to 248 degrees. For advertised cam durations up to 268 degrees, a 2,400 or 3,000-stall converter is the way to go.

Does a torque converter add horsepower?

An automatic transmission in general has a way of soaking up horsepower, but the torque converter can take a potent combination and turn it into a pig when the rubber meets the road. And while stall speed is important for a good launch, it’s also a place for horsepower to swirl down the drain.

What happens if stall converter is too low?

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 line; if too high, there’ll be excessive high-gear slippage—either case adds time to your e.t.

What does the stall mean on a torque converter?

Basically “stall” means when the torque converter “locks-up” under a load. It’s all relative to torque, vehicle weight, traction and rear gearing. It isn’t an exact science as far as an exact stall RPM goes. Stock cars have anywhere from 1,000 to 1,400 RPM stalls from the factory.

What does torque converter lock up mean?

Torque converter lock-up is engaged through a solenoid mounted inside the transmission. This clutch acts just like a clutch disc in a manual transmission application. When the converter is “locked up” this clutch is forced against the front of the converter creating a direct drive from engine to transmission.

What does torque converter lock up feel like?

The torque converter will lock up in 3 or 4th. It feels like the transmission has 5 or 6 gears. See it: If you have a tachometer or a Scangauge to check RPM’s, you can tell when the RPM’s look more closely related to the speed.

Can a torque converter lock up an engine?

Recently developed torque converters have had a “lockup” feature added to reduce this energy loss and improve mpg. This lockup feature will not engage until the vehicle reaches approximately 40 mph. Other factors may also prevent this type converter from locking up.

Is it my torque converter or transmission?

Manual transmission cars use a clutch that disconnects the engine from the transmission. Automatic transmissions use a torque converter. A torque converter is a coupling that relies on a fluid hydrodynamic to allow the engine to spin independently of the transmission.

What are the symptoms of a torque converter going bad?

Symptoms of Torque Converter Problems

1. Slipping. A torque converter can slip out of gear or delay a shift its fin or bearing is damaged.
2. Overheating.
3. Contaminated Transmission Fluid.
4. Shuddering.
5. Increased Stall Speed.
6. Unusual Sounds.

What causes a torque converter to go bad?

Many torque converter failures can be caused by excessive friction, which means the torque converter’s needle bearings are damaged. Also, a faulty seals or faulty clutch solenoid can be to blame. A faulty seal can allow fluid to leak and become contaminated. A bad torque converter can damage a transmission.