STALL SPEEDS

We test our converters for both K factor and torque ratio, among other things. The lower the K factor, the better the converter will couple. The higher the K factor, the easier the converter will spool up. The torque ratio is the torque multiplication number. For example, if a converter has a torque ratio of 1.85, then for every 100 lbs of input torque, the converter will deliver 185 lbs of output torque. This is at a converter stall or speed ratio of 0. This ratio will go down as the speed ratio goes up. Engine modifications will directly affect stall speed. Stall speeds listed below are approximate & will vary based on engine torque.

DODGE STALL SPEEDS

15SS

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. This converter should go in trucks that tow and work hard. Approximately 200 - 400 RPM lower than a stock converter.

This converter works well with:
OE turbos at 0 - 11,000 ft elev.
2^nd generation Dodge with OE - 58mm turbos at 0 - 4,000 ft elev.
3^rd generation Dodge with OE - 62mm turbos at 0 - 4,000 ft elev.

K FACTOR: 85.4

TORQUE RATIO: 1.659

DA

This converter has similar attributes to both our 15SS and 17SS. While it tows like a 15SS, the DA will have a slightly higher brake stall speed than 17SS. The DA comes with a billet stator. The torque multiplication on the DA is higher than any of our other Dodge converters. This makes for a great all-around converter.

K FACTOR: 98

TORQUE RATIO: 1.88

DC

This converter will stall approximately 150 RPM lower than a DA.

K FACTOR: 95

TORQUE RATIO: 1.8

17SS

Used for light to heavy towing. This converter stall is equivalent to a stock converter stall.

This converter works well with:
2^nd generation Dodge with 60 - 62mm turbos at 0 - 4,000 ft elev.
3^rd generation Dodge with 63 - 71mm turbos.
67 - 71mm turbos at 0 - 4,000 ft elev.
63 - 66mm turbos at 0 - 11,000 ft elev.

K FACTOR: 100

TORQUE RATIO: 1.76

17-250

This converter will be approximately 300 RPM looser than stock. It is a higher stall to help get large turbos spooled. This stall is not recommended for towing.

K FACTOR: 127

TORQUE RATIO: 1.7

GM STALL SPEEDS

G

STALL SPEED: 1800 - 1900

K FACTOR: 95

TORQUE RATIO: 1.8

X

STALL SPEED: 1800 - 1900

K FACTOR: 93

TORQUE RATIO: 1.93

E

STALL SPEED: 1800 - 2200

K FACTOR: 98

TORQUE RATIO: 1.8

DK

STALL SPEED: 1900 - 2200

K FACTOR: 98

TORQUE RATIO: 1.88

R

STALL SPEED: 2000 - 2200

K FACTOR: 101

TORQUE RATIO: 1.85

K

STALL SPEED: 2500 - 2700

TORQUE RATIO: 1.65

J

STALL SPEED: 2700 - 3000

K FACTOR: 113

TORQUE RATIO: 1.94

AR

STALL SPEED: 3200 - 3400

K FACTOR: 132

TORQUE RATIO: 1.4

FORD STALL SPEEDS

BD

STALL SPEED: 2000 - 2200

CD

STALL SPEED: 1800 - 2200

AF

STALL SPEED: 2700 - 3200

BF

STALL SPEED: 2300 - 2500