Jake Brake / Pac brake question
I may be asking a dumb question but I am researching for future DP purchase. I have a gasser and have never owned a DP but have been looking at a lot of them. Is the type of supplementary braking writ...
Forum Discussion
My Dynasty had an exhaust brake. Changed the factory one out to the PacBrake PRXB. World of difference. Much better braking power. The Executive has a two stage engine brake. Better holding power than the PacBrake.
A Jake Brake modifies the timing on the exhaust valves so that, when braking is needed, the exhaust valves open right as the piston reaches the top of the compression stroke. The energy gathered in the compressed air is released, so the compression stroke actually provides the braking power. Low position opens three valves, High position opens all six.
As for telling from the cockpit; generally speaking, an exhaust brake will simply have an on/off switch on the console. An engine brake will have a 2 or 3 position switch in a similar place. Some models also have a floor mounted pedal to activate either one. Most higher end Monacos do. Hope this helps...Dennis
A Jake Brake modifies the timing on the exhaust valves so that, when braking is needed, the exhaust valves open right as the piston reaches the top of the compression stroke. The energy gathered in the compressed air is released, so the compression stroke actually provides the braking power. Low position opens three valves, High position opens all six.
As for telling from the cockpit; generally speaking, an exhaust brake will simply have an on/off switch on the console. An engine brake will have a 2 or 3 position switch in a similar place. Some models also have a floor mounted pedal to activate either one. Most higher end Monacos do. Hope this helps...Dennis
