TORQUE CONVERTERS

NITROUS HOLESHOT™
RATED UP TO 700 HP & 550 FT-LBS

With the addition of anti-balloon plates, the Nitrous HoleShot is the strongest of the B&M street converter line. These converters will take the “instant hit” abuse of plate-type nitrous systems, and are also tough enough to handle the high power and torque of big cubic inch crate engines. All Nitrous HoleShot converters are completely balanced with full furnace brazed impeller and turbine, heavy duty needle type thrust bearings, new turbine hubs and anti-balloon plates, these are serious converters for serious performance street cars. Listed converters are NOT to be used in trans-brake applications.
- Furnace brazed impeller and turbine
- New precision steel pump drive tube
- New heavy duty needle bearings used instead of thrust washers
- New springs and rollers in stator
- Dual pattern drive lugs on some GM HoleShots
- New turbine hub
- Anti-balloon plates
HOLESHOT™
RATED UP TO 600 HP & 500 FT-LBS

The B&M HoleShot converters are an excellent choice for improving acceleration and increasing drivetrain strength in virtually any street machine. An added benefit of a Holeshot high stall converter is when a higher duration camshaft is used, the engine idle is greatly improved when stopped in gear. These high quality balanced converters come standard with full furnace brazed impeller and turbine, heavy duty needle type thrust bearings, and new turbine hubs. Please note: If your vehicle has a large displacement engine or power adders such as nitrous, the B&M Nitrous HoleShot is a better choice.
- Furnace brazed impeller and turbine
- New precision steel pump drive tube
- Dual pattern drive lugs on some GM HoleShots
- New turbine hub
- New springs and rollers in stator
- New heavy duty needle bearings used instead of thrust washers
Note: Engines smaller than 350 cubic inches may not achieve indicated stall speeds. Listed converters are NOT to be used in transbrake applications.
TRAVELER™
RATED UP TO 600 HP & 500 FT-LBS

B&M’s Traveler converters are designed for use in heavy duty applications such as motor homes and tow vehicles. The slightly higher stall speed helps to get the heavy vehicle moving, without sacrificing normal highway operation. The minor 300 RPM increase on stall speed is also helpful in keeping transmission oil temperature lower, when compared to normal high stall converters. The Traveler is stronger than a stock converter as well, through the use of new pump drive tubes, needle bearings where equipped on the original model, and new thrust washers. These units are manufactured to B&M’s specifications for long, trouble-free operation. Please note: Traveler converters are not to be used with a transbrake.
- Furnace brazed impeller and turbine fins – (not spot brazed)
- New precision steel pump drive tube
- Pressure tested
- Heavy duty needle thrust bearings between stator and turbine
- New thrust washer between turbine and cover
- Fully balanced
WARNING: High stall converters can build extra heat. B&M recommends installing a supplementary transmission oil cooler to control this extra heat, as well as a transmission temperature gage to monitor the temperature of the transmission oil. Please see B&M cooling systems.
TORKMASTER™
RATED UP TO 350 HP & 350 FT-LBS

TorkMaster – High stall performance at an incredible value. These converters are excellent all-around performance street converters. Even without a highly modified engine, these converters will give you better acceleration through a higher stall speed, allowing the engine to develop more torque at the time of initial acceleration. These quality assembled converters are put together with new pump drive tubes, needle bearings were equipped on the original model, and new thrust washers. Please note: TorkMaster converters are not recommended for higher performance big blocks or super charged engines. Stall speed listings are based on an engine producing 230 ft.lb. of torque at 2,500 RPM. More torque at 2,500 RPM will give you greater than rated stall speed, less torque at 2,500 RPM will give you less than rated stall speed. TorkMaster converters are not to be used with a transbrake.
- Highest quality “value priced” street performance converters available
- New precision steel pump drive tube
- Needle bearings where factory equipped
- New thrust washer between turbine and cover
Note: Engines smaller than 350 cubic inches may not achieve indicated stall speeds. Listed converters are NOT to be used in transbrake applications.
WHY DO I NEED A B&M TORQUE CONVERTER?

The reason for considering a B&M Torque Converter boils down to performance. Higher stall speed is the key. A higher stall converter allows the vehicle to accelerate better from a dead stop and may provide tire-smoking performance. B&M offers a wide range of performance torque converters to fit almost every need. All B&M converters are precision engineered, spin balanced and pressure tested. The B&M environmental drivetrain development lab is a key tool used in the development of every converter designed by the engineering staff. Precision engineered, tested and the success at the track provides proof that B&M Torque Converters are the finest you can buy.

WHAT SHOULD I EXPECT FROM A PERFORMANCE TORQUE CONVERTER?

Strength and durability is an additional benefit if the converter is properly engineered. Furnace brazing is used to strengthen the converter internally for high performance, racing and heavy-duty applications.

WHAT IS STALL SPEED?

Stall speed numbers are listed primarily to rate the converter’s performance level. Typically, the number assigned, 2000, 2400, 3000 etc, lets you know what to expect from the converter. If a 2400 is selected, you should be able to flash stall the converter to about 2400 RPM.

This should provide anywhere from 500 to 1000 more RPM to launch, or accelerate, the vehicle from a dead stop, as compared to the stock converter in the vehicle. This increase should substantially improve the acceleration capability of the vehicle. Lighter cars, 2800 lbs and under, typically stalls a little lower than the above mentioned numbers, therefore you should choose a converter with a higher stall number for optimum performance.

HOW DOES THE ENGINE’S CAMSHAFT AFFECT THE TORQUE CONVERTER’S PERFORMANCE?

The camshaft will affect the torque curve of the engine, which will affect the performance of the converter. For example if your 350 CID engine produces 230 lb.ft. of torque at 2400 rpm, a B&M HoleShot 2000 Converter will produce 2000 rpm stall speed. If you install a 268-degree cam into this engine you will raise the torque curve and at 2400 rpm your engine will produce less torque. Thus the 2000 stall converter will only stall at 1800 or less. However with this new cam the engine will make much more power above 3000 rpm. Keep in mind when the torque curve of the engine is raised you will need more stall speed in the converter to allow the vehicle to accelerate at low rpm (below 3000). A good rule of thumb for advertised cam durations up to 248 degrees, a 2000 or 2400 stall converter is a good choice. Advertised cam durations up to 268 degrees, a 2400 or 3000 stall converter is a good choice. Advertised cam durations over 272 degrees, a 3000 to 3600 stall converter is a must.