Exhaust Brake Questions

[BrittonTurner]

Hello,



I’m fairly new to the site and I have a few questions on exhaust brakes. If this has been covered before then I apologize in advance.



1. Which exhaust brake do you guys think is better? (Jacobs or Pacbrake)

Pacbrake seems to be an easier install but will there be any warranty issues using the Pacbrake? Cummins says the only one they recommend is the Jacobs.



2. I work for the Fire Dept in Little Rock and drive a 63’ Tiller Truck. It has a Jake Brake on it. When it rains we turn the brake off because the truck has a tendency to slide the rear duals when the brake kicks on. Since this is the first diesel that I have owned I am unsure if this would be common practice for a smaller truck like ours.







Thank you very much for your time and have a great and safe day!



Britt

 

[Casey Balvert]

I have a personal preference for the Jacobs for a number or reasons. Warrantee is the main one to for me. I have also been happy with the performance of my Jake when towing our 12,000 pound fiver. While rainy pavement should not cause a problem for the Jacobs, ice is probably a different story. Of course a lot depends on engine speed when engagining the exhuast brake as braking horsepower increases with engine speed.



Casey

 

[BrittonTurner]

thank you for the reply casey

 

[Fred Swanson]

I just installed the PacBrake Inline 4 inch brake on mine, and it works great. Have not had any warranrty problems with PacBrake.

 

[Car_nut57]

We have installed many PacBrakes and they do install nicely and work very well now that they integrate with the PCM. As for warranty, we have been told that neither the Jacobs or PacBrake effect warranty the factory warranty. Either one should provide good performance and braking. PacBrake does offer a couple of features whic are really nice. The new switch for the gear shift on the 6-speed is a rocker which won't rattle like some of the older style push/pull switches. PackBrake also offers an optional switch for the clutch pedal so the brake will not engage on up shifts when the brake is turned on. Also new is a small air tank which can be used for air horns or even blowing up a tire, but also shortens brake engage time.

 

[kbarlow]

Originally posted by Car_nut57

..... but also shortens brake engage time... .....

Are you suggesting that vacuum instead of air is better or do you mean that if you activate the brake at the same time using the air for other products will cause a delay?

Thanks Ken

 

[Joseph Donnelly]

You might want to check out BD Engine Brake also. They make an excellent unit for the 2003s.

 

[DBVZ]

Has DC approved the 48re for any e-brake yet?

 

[Car_nut57]

Originally posted by kbarlow

Are you suggesting that vacuum instead of air is better or do you mean that if you activate the brake at the same time using the air for other products will cause a delay?

Thanks Ken

The reason the brake actuates faster with the storage tank is the compressed air is already available to actuate the brake when the switch is turned on rather than actuating at the rate that the compressor operates. ie: with the pressure storage tank when the valve opens to actuate the brake the volume of air needed at pressure is immediately available to move the brake butterfly. Without the storage tank the brake cylinder actuates at the rate the air compressor operates to fill the cylinder and bring it to pressure.

 

[kbarlow]

Car_nut57



I'm sorry I didn't notice you were talking about a new air tank. I guess it would help if I paid attention to what I was reading. How big is this tank and where is it mounted?



Thanks Ken

 

[Car_nut57]

Originally posted by kbarlow

Car_nut57



I'm sorry I didn't notice you were talking about a new air tank. I guess it would help if I paid attention to what I was reading. How big is this tank and where is it mounted?



Thanks Ken

The PacBrake tank C11941 is about 8" diameter and about 10" long or so and mounts to the frame under the truck.

 

[rbattelle]

For those who installed an exhaust brake

When you installed the brake, did you re-use the turbo exhaust elbow clamps, or did the brake include new ones?

 

[Fireman]

With the Jacobs Exhaust Brake you reuse the original clamps.



Fireman

 

[rbattelle]

Thanks Fireman! I was wondering because the Holset manual for the HX-35 says if the clamps have a locknut on them you're supposed to replace them.

 

[CIverson]

How well does the pacbrake work on the auto's?



Do you have to disengage it when the transmission goes out of lockup or can it do it by itself?