Effectiveness of the exhaust brake
When the SGV exhaust brake is applied the reverse torque generated at the drive wheels is considerable reaching almost the same horse power as the motor will develop normally. This means that a vehicle can descent steep gradients fully loaded without recourse to the main brakes which are kept cool for emergency use. The breaking effect is increased as engine revolutions increase, and of course, is more pronounced in lower gears. A vehicle can descent hills 1 - 2 gears higher with maximum load than would be the case without an exhaust brake. This is a good emergency factor in the event of main brake failure. Normal brake lining life is increased by some 300-400 % because heat and fade characteristics are not encountered.
