Does anyone ever put exhaust brakes on the IDIs?

 

Does anybody MAKE one that'd fit an IDI?

I thought most exhaust brakes out there were made to replace the exhaust elbow on the turbo...but maybe I'm wrong.

 

There are several that can be installed.
Pac Brake is one off the top of my head.

International does not recommend using an exhaust brake on the IDI, but I know of several running them.

 

Any idea why?????

 

Maybe because of the high compression?

Dave, how do those ones install? Do they just go on the downpipe?

 

BD Exhaust Brake

We (BD Engine Brake) have been installing these for 15 years now on the IDI's, they work great when installed with the right automatic transmission controller. International righfully claims they can harm the automatic transmissions because the torque convertor clutch does not stay engaged on deceleration, This is true as the transmission fluid temperatures can become too hot inside the transmission unless the convertor is held in lock up, not fluid coupling when engine braking.

With a BD Torque Loc controller to keep the convertor locked up there is no problems and the braking power is much greater. Obviously this is not an issue with the manual transmission and for the 6.9L you should use a lower stall convertor, which we can also supply.

Check out the sale I put up on this forum 2 days ago... BD Exhaust Brake Sale

 

I have a US Gear model that came off my donor truck and is now under my Chevy. The only bad thing I've heard of that can happen is, the valve springs aren't very strong and the back pressure could open one enough for the piston to contact it. Might happen, might not. I guess I'll find out.

 

On a different story, my Boss is driving an 08 Dodge 3500 Quad cab dually.
He has the electronic jake brake on the truck (factory), and the thing worked great.

Keyword being worked.

Today...the sensors on his jake brake went off, engaging the brake while he was accelerating. He ended up getting towed to the dealership, as the engine would not run anymore.

Anybody have any idea what happened?

Also, could the same kind of thing happen with an exhaust brake on the IDI?

 

only thing i can think might have happened is that while he was pumping fuel/air mixture in the jake brake sensors closed down the exhaust enough to put undue pressure on exhaust valves trying to open and broke the valve stems. maybe not, just a guess.

speedrdr

 

Jacobs makes exhaust brakes but they are not the "jake brake" that a semi uses. Those work off of the motor/valve train not IN the exhaust like an exhaust brake does.

The valve springs could be an issue. For the 12V Cummins the factory valve springs are 30-35 lbs and there are brakes for them - stock. The BETTER performing brakes require a change to 60 lb. springs.

The factory "exhaust brake" on the Dodges are actually the TURBO not really an exhaust brake. The turbo basically shuts down and plugs the exhaust off.
Might be an expensive fix but it's probably all in the turbo. Could just be a switch defaulting or something simple.
This is why I like MECHANICAL DIESELS!

 

The 2003 model Cummins exhaust brake was a bolt on option.

Mounting it was just like changining the turbo outlet flange on our engines.

There are several different styles for small truck diesels.
Some even mount in the exhaust pipe under the truck, Pac Brake is that style.
The BD brake mounts up by the turbo as I remember.
Both are vacuum operated, and they just close off the exhaust to increase engine braking.

As was pointed out earlier, an exhaust brake and a Jacobs (Jake) brake are two entirely different animals.

The exhaust brake is quiet in operation, sounds like a hair dryer blowing.
Nothing like the rasping exhaust on a Jake equipped semi.

 

Just to clarify, JoSHN is talking about an '08 Dodge-Cummins and it's "brake" is actually the turbo kind of acting like a brake. It adds little cost to the truck as it's a function of the variable turbo the truck already has.
No Dodge before the 6.7L had a "factory" exhaust brake, the individual dealers might have added them and worked the cost into the financing though.

 

There's just nothing like the sound of big oil burner coming down a long grade, loaded heavy, with 6 inch straight stacks and GOOD performing jake brake.

Almost gives me chicken skin...

 

Hey Dave, my brother has an exhaust brake on his 24V Cummins, and that thing sounds so much like a jake brake it's weird. I like it though, it's pretty cool. His truck is a 6 speed btw.

 

My IDI has a straight pipe exhaust and if I let the motor engine-brake coming down a hill it sounds a lot like a jake.