Re: Adding an engine brake to U320
Reply #34 –
I have been shown the jake parts for a m11 at my local Cummins dealer. They had the parts off on a bench.
My research showed used eBay parts were around a thousand dollars plus another thousand to fifteen hundred for the install depending on what's needed for time and materials.
Afterwards I had the factory muffler removed and a jones 5050XL resonator installed.
My thoughts are that without the restrictive muffler the jake might be too noisy.
In a trade off I picked the resonator and the reduced hydraulic pump power loss by changing the over done factory selected fan controller. Used 60 hp as the motor got to operating temperature.
Major difference in the drive with the resonator and the less power losing fan controller. More low rpm power. Much less downshifting. Better mpg by 1 to 1.5.
Temp gauge the same. Source engineering in Oregon has the better fan controller.
My m11 also needed the valves and injectors adjusted and the cam position sensor upgraded and the ambient air pressure sensor upgraded. Both of those Cummins parts were inexpensive.
You could hear the engine misfiring from the partially oil soaked cam position sensor standing behind the coach with the engine idling. Shop manager heard it when he walked behind the coach.
New jake parts were $2,500 range I think when I had looked.
Fully rebuilt brakes and a 110/130 D2 valve in the air system added considerable additional braking with the higher pressure and the brakes ability to not overheat was greatly improved.
With the stronger brakes and the potentially noisier exhaust I put the jake idea on the back burner for a while.
Love to find a jake and resonator are not particularly noisy as I might reconsider the idea.
Hope this helps.
Topic: Adding an engine brake to U320