Cummins/Jacobs E-Brake

[Archive]

For anyone with a Cummins E-Brake: Does it have ports for a pyrometer probe and a braking pressure gauge?

My e-mail to Cummins disappeared into a black hole, and the expert at the Cummins service center said, "Uhh, I'm not sure. I don't think so... . "

Leo

 

[Archive]

The one installed on my Y2K does not have these ports.

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Sam Houston
'00 QC, SB 4x4, 6 speed, SLT, White over Driftwood, Cummins/Jacobs e-brake used to tow my Jeep to the trails ... ...
Rating about a 4. 5 on the STHM scale

 

[Archive]

The BD brake is much better...



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Let's see, a tagline goes here. Something witty, perhaps? Maybe just profound? Naw. Can't think of a single thing to put here.
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Been a fuel injection tech for 13+ years. Someday, I'll actually LEARN this stuff...

 

[Archive]

Power Wagon, Better than what(The old Jacobs? The new redesigned Jacobs?) and why? Mounting style? electronic interface? design? quality of parts and construction? Just curious, Tom

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(formerly milban)
2001,2500,
QC,SB,ETH,6SPD,2WD,3. 54LS
D,Sport,Black/Agate,Trlr
Tow,Camper Sp,Slid Rr
Glass,no roof lts,Cobra
75,Rolln'
lock,Bedrug,Reese ClIV
frt Titan Cl V rr & flip
gooseneck,Valentine

 

[Archive]

Power Wagon... ok, I know I'm probably over my head discussing mechanics with a mechanic... but here goes. .
Your statement that the BD exhaust brake is better. . if you are talking about RHP, yes, BD develops more. Any other reason, I just don't see it. I have the E Brake, and with my limited knowledge, researched this prior to purchase. The e brake doesn't require micro switches, it is connected directly to the ECM. Very easy installation. I did it myself. The e brake looks like it has much less parts exposed for possible damage due to the elements. The e brake works very well when pulling my horse trailer or the flatbed. I will say, however, that the friends I know with the BD are happy.


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Rob Hanson
1999 3500 SLT QC 4X4 Cummins
Flame Red, Rhino, 6 spd, 4. 10LSD, FX Running Boards, Cobra CB, Stinger Bug Shields, Mag-Hytec rear cover, Cummins E-Brake, Torklift Super Hitch, BD 4" exhaust, Blue Box, Halogen Backup Lights, 4"rear mounted tractor lights, Autometer SportComp Boost and EGT Guages, K&N RE-0880,
Member of BOMB! (WW NW Chapter)

MyPics.com

I'd rather be... .
Cummin than Strokin.

 

[Archive]

Concerning the RHP of the BD, I have heard that too much braking power causes the rear tires to wear very fast. I have not purchased an exhaust brake as I have heard that there are differences in the new ETH turbo housing, but have been considering the Jacobs just because it is built (or is a wholly owned subsiderary) by Cummins. Wouldn't this ease any warranty issues that might arrise?

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David Dressler
(Ordered) 2001 Driftwood 3500 Quad Cab 4x4, 155 inch WB, 5. 9L HO Cummins Diesel (ETH), 6-Speed HD Manual (DEE), SLT Plus, 3. 54 Anti-Spin Axle, Camper Special Group, Trailer Tow Group, Leather, Sliding Rear Window, YG7 (2 addl' gals of gas).
"Diesel, it's not just for breakfast!"

 

[Archive]

Concerning too much: I am sure that BD has tested what the max RHP is, that still will not harm the motor. However, the warranty issue is partly valid. The Cummins e brake is 100,000 mile warranty. It would be awfully difficult for them not to uphold their warranty of the motor due to the e brake. With any other brand, I am sure that is the first or second thing you would hear. Dodge and Cummins are no different than any other... warranty work costs are the bottom line. They will only do what they have to(of course, there are some exceptions). Out of all the new vehicles I have owned, none make warranty work anything but unpleasant. That is why I am my own warranty station for my Cummins.

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Rob Hanson
1999 3500 SLT QC 4X4 Cummins
Flame Red, Rhino, 6 spd, 4. 10LSD, FX Running Boards, Cobra CB, Stinger Bug Shields, Mag-Hytec rear cover, Cummins E-Brake, Torklift Super Hitch, BD 4" exhaust, Blue Box, Halogen Backup Lights, 4"rear mounted tractor lights, Autometer SportComp Boost and EGT Guages, K&N RE-0880,
Member of BOMB! (WW NW Chapter)

MyPics.com

I'd rather be... .
Cummin than Strokin.

 

[Archive]

But Cummins will not install a Jacob E-brake on a automatic and Dodge will not warranty the truck either so it looks like lots of expensive brake jobs until I,m my own warranty station at 100,000 miles!

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99-24V-2500-Laramie-SLT-A/T-LSD-355
All Options except cab lights and carpet-Rino- Prime-Loc-Alcoa wheels-Lund cold front-Factory Tows_ALASKA

 

[Archive]

When I referred to the RHP, I merely meant it as a possible concern for tire wear only. I am sure that there is no concern about harming the engine. It is quite interesting why the Jacobs E-Brake does have a much lower RHP value. Additionally, have you noticed that it is even lower for the 24-V engines than the 12-V??? Perhaps the original thought was to ease the stresses placed on the torque converters for the automatic transmissions-now since it is not authorized, this isn't really an issue anymore. Do we even know what the ratings are for the new E-Brake designed for the ETH? Just some thoughts.

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David Dressler
(Ordered) 2001 Driftwood 3500 Quad Cab 4x4, 155 inch WB, 5. 9L HO Cummins Diesel (ETH), 6-Speed HD Manual (DEE), SLT Plus, 3. 54 Anti-Spin Axle, Camper Special Group, Trailer Tow Group, Leather, Sliding Rear Window, YG7 (2 addl' gals of gas).
"Diesel, it's not just for breakfast!"

 

[Archive]

Well... This is all I can say on the topic. The BD brake is a very well and durably constructed device. Yes, it uses a microswitch, but I see no reason for it to be anything less than very reliable. It has the neat feature of being adjustable - especially idle pressure, and so it also continues to retard even at low rpm's.

It also installs nicely as a simple, bolt on arrangement, that's completely ready for pyro and pressure gauges.

As far as RHP goes, I'm not sure I'd choose which brake just on the basis of 10 or 20 RHP difference, but on whether or not it'll keep working for the 2, 4, 6, 10 or 12 years you have your truck. One soon depends on the brake when you have it, and like any other brake failure, it would be an absolute disaster if it suddenly didn't work.

That's why I'd say to choose the best constructed one, and worry less about the last few retarding horspower. Hope I've cleared that up.


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Let's see, a tagline goes here. Something witty, perhaps? Maybe just profound? Naw. Can't think of a single thing to put here.
-------------------------
Been a fuel injection tech for 13+ years. Someday, I'll actually LEARN this stuff...

 

[Archive]

Re RHP:

Here is a sampling of the RHP numbers I collected this week:

rpm BD Pac Cummins
1400 100 15 40
2000 180 60 80
2600 195 125 117

Caveats: BD & Cummins are eyeballed off charts on their websites. Pac gave me the numbers by email, with the HOD (aka ETH) 6 spd under discussion. Not clear for BD or Cummins that they apply to the 24V.

Leo

 

[Archive]

the 24 valve is less. Not really sure why. But it is substantially less. Something like 40 HP less?



------------------
Let's see, a tagline goes here. Something witty, perhaps? Maybe just profound? Naw. Can't think of a single thing to put here.
-------------------------
Been a fuel injection tech for 13+ years. Someday, I'll actually LEARN this stuff...

 

[Archive]

I believe I read that the reason the 24v engines produce less retarding hp. than the 12v engines was attributed to the new head design.

The use of an exhaust brake with an auto. equipped Ram will NOT void the DC warranty. Reference this in a past issue of the TDR (issue 25 I believe).

I feel the BD exhaust brake is superior to all other brakes currently on the market for the following reasons: 1) highest retarding hp. , 2) highest valve opening and closing pressures (the industries largest diameter valve is also least likely to get stuck), 3) does not impose an exhaust flow restriction as some of the other brake designs do, 4) extremely high quality (both in materials used in construction of the brake, additional [supplied] parts required for installation, and factory workmanship of said brake), and 5) adjustability of the idle back pressure which allows one to custom tune the brake to desired levels (within its operational parameters). #ad


I do however, like the ECM integration feature of the Jacobs/Cummins E-Brake as opposed to the BD and Pac-Brake micro switch technology. The micro switch arrangement is good... the integration to the ECM is better.

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'98. 5 2500 QC 4x4, (Black) SLT Sport, ISB, LWB, 3. 54 LSD, A/T, Glasstite Vision II canopy, Line-X bed liner, 285/75R16 BFG A/Ts on 16x8 M/T Challengers, Warn 4X Boards, Mopar fender flares, front and rear NW Custom stainless steel/rubber mud flaps, Mag-Hytec diff. cover and trans. pan, Edelbrock IAS shocks, Mopar tow hooks, Jordan Research Ultima 2020 trailer brake controller, VDO Vision gauges, PIAA Dual Sport 900 auxiliary lights and Super White bulbs, BD exhaust brake and TorqLoc, Prime-Loc fuel filter relocation kit, "Scotty Air System", Hitco/Geno's exhaust blanket, Femco/Geno's EZ Drain oil pan plug, Banks Stinger 4" dia. stainless steel exhaust system, plus many other trick modifications

'00 Polaris 6x6

 

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John,

Do you know the rhp vs rpm curve for the 24 valve for the BD?

Leo

 

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FYI. PacBrake did send me an installation paper per my request, and it does look like they have an ECM option.

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David Dressler
(Ordered) 2001 Driftwood 3500 Quad Cab 4x4, 155 inch WB, 5. 9L HO Cummins Diesel (ETH), 6-Speed HD Manual (DEE), SLT Plus, 3. 54 Anti-Spin Axle, Camper Special Group, Trailer Tow Group, Leather, Sliding Rear Window, YG7 (2 addl' gals of gas).
"Diesel, it's not just for breakfast!"

 

[Archive]

Powerwagon; John
Question on exhaust brake, ability to be adjustable at idle. Do you or any one have a high idle switch (which I have for cold weather starts) I have been told by the dealer that can not use the exhaust brake off of idle (idle at 1100 to 1200) truck parked such as warmup in the morning.
I need to be able to turn on the brake while at high idle.
2nd question at idle can the brake be adjusted so it is partially closed rather than just closed completely when you turn on the exh brake. Been told that you have to watch temp with brake on for very long.
I would like to set the brake to about 30% closed st it will bring up the engine temp. at our cold temps, the engine never will get over 140 at idle. Fairbanks, Alaska at -25 to -50.
99 QC 4x4 slt 5sp lsd camper, trailer tow, ect

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99QC,5sp 4x4,Slt,TT,lsd,camperpkgect.

 

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Anyone from California here? I just got this email from Cummins regarding the new exhaust brake on the 2001 Ram:

"The brake is retrofittable to all model years from 1989 through 1997, one exception being that it must NOT be installed on engines fitted with Exhaust Gas Recirculation (EGR) valves. This restriction is not unique to our product. Engines fitted with EGR must NOT have an exhaust brake of any type installed. The EGR valve is a CARB emissions requirement for vehicles sold and operated in California. "

Tell me we just got our wires crossed or that this guy is confused. He also was able to tell me about the changes to the ETH engine:

"The 235 vs 245 difference ? Many parts are different but the engine looks the
same. "


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David Dressler
(Ordered) 2001 Driftwood 3500 Quad Cab 4x4, 155 inch WB, 5. 9L HO Cummins Diesel (ETH), 6-Speed HD Manual (DEE), SLT Plus, 3. 54 Anti-Spin Axle, Camper Special Group, Trailer Tow Group, Leather, Sliding Rear Window, YG7 (2 additional gallons of gas).
"Diesel, it's not just for breakfast!"

 

[Archive]

Moved to Product Forum.
To answer Dresslered's question, yes, that's true, you can't put an exhaust brake on a California EGR equipped truck. I was under the impression that the exhaust brake manufacturers were working on a way to make them compatible, but I don't know if they have, yet.
I listened to Brian Roth's presentation at the BD Dyno Days event. He said that their exhaust brake has a spring in it which, at high RPM, blows the valve open a bit, so there is not too much braking. This means that the valve can give full braking power across a wider RPM brand than the others. I may not be explaining it right, I don't know. Also, he said the BD has a larger vacuum chamber than the others, which means there is much more force available to open and close the valve, reducing the risk of the valve sticking. They use vacuum power to open and close the valve (as do some of the other brands) instead of an electrical solenoid (I believe the U. S. Gear uses that), because they found that the high temperature environment created too much resistance. He also mentioned that they use an aluma-bronze bushing instead of stainless steel, they found it's much more durable.
Piers, correct me if any of this information is erroneous.
I have a BD on my 5-speed truck, and it works great, I use it everyday just driving around town. I also use it to help warm up the idling engine on cold days. It puts a load on the engine which builds heat.
(BTW I'm not trying to sell the BD, I'm just relaying what I learned at the Dyno Days)
Andy

 

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I sure hope your wrong as I just ordered an Jacob's E-Brake for my 2001 California Ram. I believe that there are quite a few other California Rams with this same configuration.

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David Dressler
2001 Driftwood 3500 Quad Cab 4x4, 155 inch WB, 5. 9L HO Cummins Diesel (ETH), 6-Speed HD Manual (DEE), SLT+, 3. 54 Anti-Spin Axle, Camper Special Group, Trailer Tow Group, Leather, Sliding Rear Window, etc.
"Diesel, it's not just for breakfast!"

 

[Archive]

David,

If you have 24 valves I'd be surprised if you have a "California EGR equipped truck" as mentioned in the post by Andy. #ad