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285 Jake Brake

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I'm pretty sure the 285 was built with the heavy duty cam for use with with a jake brake.

As matter of fact Trent your engine likly has a dynatard cam !the cams where basicly all the same . the jake is not much more if any more effective on a 285 than the dynatard, and a much easier install .Just rockers pushtubes and diffrent valve covers and the same wiring as the jake!

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I'm pretty sure all Mack cams were compatable with Dynatard since the mid 70's. Dynatard is a much easier install with the tip fan intercooler. Dynatard also uses a switch actuated by the fuel rack so will not stall the engine. You could use that switch on a Jake also.


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