Joseph Donnelly
TDR MEMBER
Today I watched a duel between the Sachs/brass puck clutch in a frisky, "adequately" fueled 12 valve Ram and the roller's brake of the Dynojet.
Who would win? In order to get as good a torque reading as possible, Lawrence Bolton "tortured" the poor little Ram by dragging down the engine's rpm with the Dynojet brake, while applying an "earnest" dose of accelerator pedal (transmission in 5th gear). This builds boost and power down at 1500 rpm or so. When the roller's brake is released, the engine can accelerate as usual and the hp curve is measured. Obviously, this procedure puts a tremendous load on the clutch, and this Sachs wasn't even fully broken in--it was installed about 10 days ago.
Lawrence and I detected some unevenness to the engine's tone, and he said he believed the Dynojet brake was slipped by the Ram's torque. He did not feel any clutch slippage.
Who would win? In order to get as good a torque reading as possible, Lawrence Bolton "tortured" the poor little Ram by dragging down the engine's rpm with the Dynojet brake, while applying an "earnest" dose of accelerator pedal (transmission in 5th gear). This builds boost and power down at 1500 rpm or so. When the roller's brake is released, the engine can accelerate as usual and the hp curve is measured. Obviously, this procedure puts a tremendous load on the clutch, and this Sachs wasn't even fully broken in--it was installed about 10 days ago.
Lawrence and I detected some unevenness to the engine's tone, and he said he believed the Dynojet brake was slipped by the Ram's torque. He did not feel any clutch slippage.