I’ve been considering an Exhaust Brake for years while traveling with our big Lance 900 in our truck bed.But now that I have sold that & I’m towing a heavier Travel Trailer & on our 1st outing probably drove around 2000 miles & I’ve sold off my other toys & plan to focus on my tow rig & want to start with an exhaust brake & maybe water/meth injection after that?I was telling a co worker & he started asking about being I have mods bringing me to 500 HP.If that might be an issue?I can’t imagine why it would cause problems?But wonder if I’m wrong?& then what might be my best bet for the best help on those long steep grades?Don’t want to be over heating my brakes.I figured I’d mount the switch right under the shifter knob.I’ve heard there’s even adjustable models & some with built in safety’s like in case I forget to turn off the brake I don’t stall the truck while shifting?I’ve heard of other options that would also turn it off when I accelerate.& back when when I let off?I’ve also heard of turbos that have them built in to it?& would those work as well with out lowering my HP?I also would mention , I have a 4” straight pipe from the turbo.

Generally the exhaust brake wiring would tie into the clutch pedal safety switch, similar to cruise control and that it would disconnect when you pressed on the clutch. Of course being you are adding the exhaust break after market you might need to be creative with the wiring to do such.

All I could afford wrote:Generally the exhaust brake wiring would tie into the clutch pedal safety switch, similar to cruise control and that it would disconnect when you pressed on the clutch. Of course being you are adding the exhaust break after market you might need to be creative with the wiring to do such.Interesting, thanks.

I may be wrong but I've never heard of an EB disconnecting when pushing the clutch. Mine is controlled by the trucks ECM and does not disengage with clutch pedal action - and I'm not sure why it would. There's no reason to have it disengage while your shifting either up or down. Normally for models earlier than the Common Rails, a switch is attached to the throttle pedal so anytime you have your foot on it, it disengages or engages anytime you take your foot off. Engine mods have no relation to the EB so your safe there. You do need to have the appropriate valve springs and I don't know if your truck came with them or not. (I think so). The switch under the shift lever works great and is where I put mine. It's very convenient and causes a lot of questions!I think you'll find you wish you would have put one on sooner and I can't imagine being without it!(BTW, it's a "Cummins")

I would contact EB dealers/mfg with those questions. They can give you answers on current their EB for the 5.9 Cummins. Some of the diesel speed shops carries them and can be helpful for tech questions on your modded 5.9 Cummins. My '03 Dodge Cummins/NV5600 came with the Jacobs through Dodge Businesslink dealers which gave me a Dodge warranty (long gone now). The EB switch is under the shifter knob. It works in all forward gears (even reverse). It stays on with the clutch in or out....has a hi idle/EB on for fast warm ups. The Jacobs is vacuum operated so it has a vac inline mechanical pump with a long long belt. I've had no problems with mine for over 300k miles. Vacuum vs air pressure. Most brands are are operated with a remote air pump which are handy for airing up other things.

Contact PacBrake. Go with the 4" outlet model. The standard 3" is too restrictive.

Exhaust Brake on a 12 valve Hot Rod Cummings, manual trans?

Grit_dog
Navigator
May 25, 2018
Blanco1 wrote:
Grit dog wrote:
Exh brake is bolt on for your truck. Air is handy for air bags and bike tires, etc.
if you're really at 500hp I'm surprised you don't have upgraded valve springs.
It's a great addition.

Who said i didn't?

Should have said I’d be surprised if you didn’t.
So whaddaya got?
rhagfo
Explorer III
May 25, 2018
HadEnough wrote:
rhagfo wrote:
ScottG wrote:
HadEnough wrote:
Hmm...not how my exhaust brake works on my 2002 12v Cummins ram that is also a hot rod.

I leave my shift switch on all the time for around town driving and lights too.

The exhaust brake only kicks in when you are off the throttle about 1-2 seconds and in gear. At all other times, it's in standby.

That's how they work.

Yes, that's how it works (with delay) if your able to connect to the trucks ECM.
Some older trucks dont have a ECM connection for the EB so switches have to be installed.

That is really interesting, 2002 should be a 24V with an ECM, and then the EB would have a 2 second delay before applying. If you have a 12V in your 2002 the 12V would be fully mechanical and not have an EMC to control the EB.
I chose to make mine fully manual so I have full control over activation, so as soon as my foot is off the throttle EB is working! Empty it will almost bring the truck to a full stop in 3rd.

That IS really interesting... Since I wrote 12v when I meant to write 24v. Lol. Sorry about that.

That's a cool setup making it fully manual. Have you ever had to replace the switch? I've been cautious of turning mine on and off a lot just so I don't need to replace the switch at the shift.

No never need to replace, did need once to spray with contact cleaner. This is the switch from PacBrake.
HadEnough
Explorer
May 25, 2018
rhagfo wrote:
ScottG wrote:
HadEnough wrote:
Hmm...not how my exhaust brake works on my 2002 12v Cummins ram that is also a hot rod.

I leave my shift switch on all the time for around town driving and lights too.

The exhaust brake only kicks in when you are off the throttle about 1-2 seconds and in gear. At all other times, it's in standby.

That's how they work.

Yes, that's how it works (with delay) if your able to connect to the trucks ECM.
Some older trucks dont have a ECM connection for the EB so switches have to be installed.

That is really interesting, 2002 should be a 24V with an ECM, and then the EB would have a 2 second delay before applying. If you have a 12V in your 2002 the 12V would be fully mechanical and not have an EMC to control the EB.
I chose to make mine fully manual so I have full control over activation, so as soon as my foot is off the throttle EB is working! Empty it will almost bring the truck to a full stop in 3rd.

That IS really interesting... Since I wrote 12v when I meant to write 24v. Lol. Sorry about that.

That's a cool setup making it fully manual. Have you ever had to replace the switch? I've been cautious of turning mine on and off a lot just so I don't need to replace the switch at the shift.
rhagfo
Explorer III
May 25, 2018
ScottG wrote:
HadEnough wrote:
Hmm...not how my exhaust brake works on my 2002 12v Cummins ram that is also a hot rod.

I leave my shift switch on all the time for around town driving and lights too.

The exhaust brake only kicks in when you are off the throttle about 1-2 seconds and in gear. At all other times, it's in standby.

That's how they work.

Yes, that's how it works (with delay) if your able to connect to the trucks ECM.
Some older trucks dont have a ECM connection for the EB so switches have to be installed.

That is really interesting, 2002 should be a 24V with an ECM, and then the EB would have a 2 second delay before applying. If you have a 12V in your 2002 the 12V would be fully mechanical and not have an EMC to control the EB.
I chose to make mine fully manual so I have full control over activation, so as soon as my foot is off the throttle EB is working! Empty it will almost bring the truck to a full stop in 3rd.
Me_Again
Explorer III
May 25, 2018
HadEnough wrote:
Hmm...not how my exhaust brake works on my 2002 12v Cummins ram that is also a hot rod.

I leave my shift switch on all the time for around town driving and lights too.

The exhaust brake only kicks in when you are off the throttle about 1-2 seconds and in gear. At all other times, it's in standby.

That's how they work.

You put a 12V in a 2002?
NRALIFR
Explorer
May 24, 2018
Cummins12V98 wrote:

I always say "Cummings" is a place in GA.

I always say Cummings is an idiot from Maryland.

:):)
Blanco1
Explorer
May 24, 2018
rhagfo wrote:
Blanco1 wrote:
JIMNLIN wrote:
I would contact EB dealers/mfg with those questions. They can give you answers on current their EB for the 5.9 Cummins. Some of the diesel speed shops carries them and can be helpful for tech questions on your modded 5.9 Cummins.

My '03 Dodge Cummins/NV5600 came with the Jacobs through Dodge Businesslink dealers which gave me a Dodge warranty (long gone now). The EB switch is under the shifter knob. It works in all forward gears (even reverse). It stays on with the clutch in or out....has a hi idle/EB on for fast warm ups.
The Jacobs is vacuum operated so it has a vac inline mechanical pump with a long long belt. I've had no problems with mine for over 300k miles.

Vacuum vs air pressure. Most brands are are operated with a remote air pump which are handy for airing up other things.

Airing up other things like what?
It probably would not properly fill up the tire to the proper PSI would it?

That might be a good selling point to me?

That is the PacBrake bonus, on board air. Pacbrake has the option for shiftier mounted rocker switch, simple flick of a finger.

I've also been wanting to install a Big Rig air horn being it sounds like one already. LOL!
Blanco1
Explorer
May 24, 2018
Grit dog wrote:
Exh brake is bolt on for your truck. Air is handy for air bags and bike tires, etc.
if you're really at 500hp I'm surprised you don't have upgraded valve springs.
It's a great addition.

Who said i didn't?
ScottG
Nomad
May 24, 2018
HadEnough wrote:
Hmm...not how my exhaust brake works on my 2002 12v Cummins ram that is also a hot rod.

I leave my shift switch on all the time for around town driving and lights too.

The exhaust brake only kicks in when you are off the throttle about 1-2 seconds and in gear. At all other times, it's in standby.

That's how they work.

Yes, that's how it works (with delay) if your able to connect to the trucks ECM.
Some older trucks dont have a ECM connection for the EB so switches have to be installed.
Cummins12V98
Explorer III
May 24, 2018
Blanco1 wrote:
ScottG wrote:

(BTW, it's a "Cummins")

Darn spell check on my phone!

Of course I know this I've owned this truck about 7 years?

I always say "Cummings" is a place in GA.

Forum Discussion

Exhaust Brake on a 12 valve Hot Rod Cummings, manual trans?

About Travel Trailer Group

Related Content

Cummings Diesel

fiat vs Cummings diesel

Heater exhaust

Exhaust Brake

Exhaust filter