They do sound cool but not to the town cops around North Texas. Most have signs that prohibit the use of exhaust brakes.

 

I would also think that an exhaust brake wouldn't be good for the engine.

A jake brake is not an exhaust brake, but rather an engine brake. It would require a major over-haul of the heads and some other components. It would be expensive, and the company who make the Jake Brake does not have a kit for the 6.0 engine. If I remember correctly, some of the Cummins engines can be fitted with the Jake Brake.

 

F250tuff,
I was using the term Jake Brake loosely, to describe the the various systems in larger trucks I have driven. Jacobs Vehicle Systems (http://www.jakebrake.com/content.php4?doc_uid=3) does make both engine and exhaust brake systems. I have quoted the functions of both:

"The Jacobs Engine Brake® is a device that mounts on, or within, the engine overhead. It changes the timing of the engine exhaust valves, turning the engine into a giant air compressor. The resulting retarding power is proportional to engine RPM (always stay within engine manufacturers recommendations). It is typically used on heavy-duty vehicles commercial vehicles ("big rig" trucks and buses) enabling safer vehicle speed control in several driving conditions, from flatlands to steep downhill descents. The result is increased productivity (thus profitability) from shorter trip times (faster downhill control speeds), and reduced maintenance costs and downtime (from reduced use of the foundation braking system).

The principle behind the Jacobs Engine Brake engine retarder is simple. It's a hydraulically operated device that converts a power-producing diesel engine into a power-absorbing retarding mechanism by opening the engine's exhaust valves near the top dead center (TDC) of the compression stroke. The engine creates a distinctive sound while in operation, but is barely noticeable if OEM-quality exhaust mufflers are maintained on the vehicle. To understand how the Jacobs Engine Brake retarder provides its strong retarding power, click here.

The Jacobs Exhaust Brake® is a device that mounts in the exhaust system of the vehicle, and restricts exhaust flow when activated. It is virtually silent when in operation, and provides retarding power that is proportional to engine RPM. (Always stay within engine manufacturers recommendations). It is typically used on class 2 through 7 (medium duty) vehicles.

The Jacobs Exhaust Brake is a supplementary braking system used to help slow your vehicle. This slowing power is achieved by restricting the flow of exhaust gasses and increasing back pressure inside the engine. This increased back pressure creates resistance against the pistons in your engine, slowing the crankshaft's rotation and ultimately helping to slow your vehicle."

The system that they use in the Dodge trucks with the Cummins engine is an Exhaust Brake system.

 

The BD Power's exhaust brake is described as only increasing the exhaust backpressure 40 pounds and claims to be well below the engine's peak pressures. Exhaust brakes should only operate while you are off the throttle anyway, so the engine should be making less pressure than under a full load. The exhaust brake for the 7.3 PSD simply replaces the stock rear portion of the waste gated turbine housing or as in the 6.0 it mounts down in the exhaust system. I couldn't find out where in the exhaust system it actually mounts, so I may have to call them Monday. I also believe they have a control system which will activate the exhaust brake while at an idle to make the engine "work" and create more heat. This would allow your engine to heat up faster than at a normal idle. My friend was telling me how he really liked this feature on his Cummins especially during the winter.

I am not employed by BD nor do I sell BD products. I am an just an interested consumer and this is the first exhaust brake I have found for the 6.0 PSD.

 

Sorry I got off the original topic of engine braking involving the TorqShift transmission and flashes. I could have started a new post, but the exhaust brake also does present a alternative solution to any removed or reduced engine braking any flashes may created.

 

You are right, Twin Tritons. I hadn't considered the fact Jacobs made an exhaust brake. I also like the sound of the engine brake. I have driven trucks with the engine brake for the last 8 years. I know a trucker with one that beats your chest and hurts your ears when he gets on it. The ones like him are what cause the signs in these small towns that prohibit the engine brake, although it does sound cool.

 

Didn't mean to come off sounding too defensive, F250tuff. I had to check for sure on the Jake Brake issue myself because it has been at least 12 years since I have driven a big truck. I found it very informative and wanted to share it with all the fellow FTE members here. Someone else will probably ask about exhaust brake systems in the future and now more people will be able to help them out.
Now I need to find someone in my area that has a exhaust brake system on their PSD in my area to see how it sounds and most importantly how it WORKS. I'd hate to spend the $1500 or so on a system and find out I don't like it.

 

Jake brake has been asked by Ford not to develop a brake for 6.0.
Jacobs has also said can not make brake for 6.0 because of juice lifters.
See at jakebrake.com -under F.A.Q.
Back to FMC.

 

I have been told by one the techs over at http://flatratetech.com/6literpowerstroke that the engine brake on 4th & 5th is still there but acts differently. You need to use brakes more. ???

 

This was on Ford's web page:
Never mount an exhaust brake to any vehicle equipped with a Power Stroke Diesel. Doing so may void your engine and powertrain warranty.

 

The valvetrain of a diesel engine has to be designed to except and engine brake, or your just asking to drop a engine valve. Even diesels that are design for an engine brake have problems. During braking mode is the highest stress placed on the the engine valvetrain. I have lots of data and broken parts to back up the previous statement .

Brian
Engine research & development

 

Are you saying coming form 60mph down to 48 or...
How are you setting the tranny brake, i.e. how are you activating it.

 

Hi Tim
If I am at 60mph in tow/haul and let off give braking engine goes to near idle even if I brake more nothing, as truck slows to about 48mph rpms come up and I have braking.
In 3rd gear by then.
The tourque converter does not stay locked until 3rd gear.
Hope you understand.
Waiting to talk to district rep. Also FMC is sending me DSB papers. They say truck is
within FMC perimeters.
I paid for engine braking when I bought the truck and want it back. It worked great
until I had the Recall flash for Ca. emissions done. I live in Az. how dumb can I be?

 

No one is dumb, the way to overcome ignorance is to collect information, and you just did not have all the info you needed to make a decision.
What you wrote does make sense, is this on a flat road or hill or…

 

Desert Racer, are you looking for a buy back, trade up? Is this based on the tow/haul mode or other things?