Exhaust Brake
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Postmaster
Joined: Mar 2008
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From: Sweet Home, OR
Any idea why?????
Former Vendor
Joined: Mar 2006
Posts: 662
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From: Surrey, BC
BD IDI Exhaust Brake
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
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
Senior User
Joined: Feb 2007
Posts: 426
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From: Pukalani, HI
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.
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Joined: May 2008
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From: Americas' hat (Canada)
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?
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?
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Elder User
Joined: Feb 2007
Posts: 549
Likes: 1
From: Mississippi
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?
Anybody have any idea what happened?
Also, could the same kind of thing happen with an exhaust brake on the IDI?
speedrdr
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Postmaster
Joined: Mar 2008
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From: Sweet Home, OR
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 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!
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
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.
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.
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Postmaster
Joined: Mar 2008
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From: Sweet Home, OR
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.
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.
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Joined: Jul 2004
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From: West Valley Utah
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...
Almost gives me chicken skin...