exhuast brake

[carl07230]

Are there any articles about the exhaust brake (Jake brake). Operation, what trucks have them, where is it located, etc. Can't visit here very often but when I do I am learning more and more. First it was fuel coponents then intake now exhuast.

 

[RVTRKN]

Was your ATS trans updated for exhaust brake operation, the thrust bearing will be destroyed if not.

 

[bigceltic]

TDR Issue 71 has a big article on exhaust brakes, under the Technical Topics heading (Pg48-52).

 

[carl07230]

RVTRKN- Don't think my transmission was upgraded for eshaust brake when installed. Don't know anything about them, how they operate,etc. That's why all the ?????s. LOL

 

[Shadrach]

On the Dodge/Cummins the exh brake mounts on the back of the turbo, between the exh pipe and the turbo itself. On your engine there is a cast elbow clamped between the pipe and turbo. It gets removed and the new elbow with the brake valve in it gets put in its place. Make sure you get one for an 04 and not an 04. 5 as the pipe diameter is different. Officially Dodge never recommended one for trucks with an auto trans before 06 as the transmission wouldn't take the abuse as mentioned already. The "Jake" brand uses a belt driven vacuum pump to operate the pump, while most other brands, like Pac and BD use an air compressor, usually an electric one. A cab mounted switch turns it on and off.



When the switch is turned on and you lift your foot off the throttle pedal the brake valve closes putting a restriction on the exh causing the engine to slow down because the flow of exhaust in now restricted and the fuel supply has been stopped. This slows you down with out using you regular brakes saving wear and tear on them. Whne you are towing a big or heavy trailer this is a big help as you now have two methods of stopping, the exh brake and the service brakes ( the pedal ).



The Jake vacuum pump mounts just above your injection pump and is driven by the main belt. A new and longer belt comes in the kit. The disadvantage to this is you now have a different size belt if it ever breaks out on the road. You could always put a stock one back on, you just wouldn't have an exhaust brake for the rest of the trip. One other problem it that the vacuum pump seem to be a problem part as I've seen lots of them being replaced. For more details read this : http://www.jacobsvehiclesystems.com/files/support/docs-pdfs/32414 E2_Screen.pdf



The ones, like the Pac PRXB, use an air source. The operation is the same but there is no vacuum pump, therefore your belt doesn't get changed. They have several choices of 12 volt air compressors to choose from. One advantage is that you can add an air storage tank and use other things like an air horn, air bags for your rear suspension or just to inflate tires or an air mattress. This is the one I have although I have a HD belt driven compressor but that's another story See here :http://www.pacbrake.com/index.php?page=prxb-exhaust-brakes



With the HCPR engines like you and I have you can also turn on the brake when the engine is cold. This will put a light "load" on the engine and help it warm up faster. It will auto kick off if the engine gets too hot. Also if your are travelling with the cruise on, and the brake switch is turned on, and you start to gain speed going down a hill the brake will come on automatically to slow you down to the speed you set the cruise to, but only if your foot is off the throttle.



Banks explains how it works here. http://www.bankspower.com/techarticles/show/17-How-An-Exhaust-Brake-Works



End of Exhaust Brakes 101 Shad

 

[mwilson]

On the Dodge/Cummins the exh brake mounts on the back of the turbo, between the exh pipe and the turbo itself. On your engine there is a cast elbow clamped between the pipe and turbo. It gets removed and the new elbow with the brake valve in it gets put in its place. Make sure you get one for an 04 and not an 04. 5 as the pipe diameter is different. Officially Dodge never recommended one for trucks with an auto trans before 06 as the transmission wouldn't take the abuse as mentioned already. The "Jake" brand uses a belt driven vacuum pump to operate the pump, while most other brands, like Pac and BD use an air compressor, usually an electric one. A cab mounted switch turns it on and off.



When the switch is turned on and you lift your foot off the throttle pedal the brake valve closes putting a restriction on the exh causing the engine to slow down because the flow of exhaust in now restricted and the fuel supply has been stopped. This slows you down with out using you regular brakes saving wear and tear on them. Whne you are towing a big or heavy trailer this is a big help as you now have two methods of stopping, the exh brake and the service brakes ( the pedal ).



The Jake vacuum pump mounts just above your injection pump and is driven by the main belt. A new and longer belt comes in the kit. The disadvantage to this is you now have a different size belt if it ever breaks out on the road. You could always put a stock one back on, you just wouldn't have an exhaust brake for the rest of the trip. One other problem it that the vacuum pump seem to be a problem part as I've seen lots of them being replaced. For more details read this : http://www.jacobsvehiclesystems.com/files/support/docs-pdfs/32414 E2_Screen.pdf



The ones, like the Pac PRXB, use an air source. The operation is the same but there is no vacuum pump, therefore your belt doesn't get changed. They have several choices of 12 volt air compressors to choose from. One advantage is that you can add an air storage tank and use other things like an air horn, air bags for your rear suspension or just to inflate tires or an air mattress. This is the one I have although I have a HD belt driven compressor but that's another story See here :http://www.pacbrake.com/index.php?page=prxb-exhaust-brakes



With the HCPR engines like you and I have you can also turn on the brake when the engine is cold. This will put a light "load" on the engine and help it warm up faster. It will auto kick off if the engine gets too hot. Also if your are travelling with the cruise on, and the brake switch is turned on, and you start to gain speed going down a hill the brake will come on automatically to slow you down to the speed you set the cruise to, but only if your foot is off the throttle.



Banks explains how it works here. http://www.bankspower.com/techarticles/show/17-How-An-Exhaust-Brake-Works



End of Exhaust Brakes 101 Shad

Nicely done Shad!!! Two thumbs up!!!



Mike.

 

[carl07230]

Thanks Shad, I do see a little canister with a plunger on the back side of the stock turbo. Is this the exhaust brake. I guess using an exhaust brake is like doing 60 mph and shifting it down into second. LOL

 

[CKelley1]

I agree, nicely done shad. carl the brake is not that strong, it is somewhere around 150 brake horse power if I remember correctly. if you will use it first or instead of the truck brakes the pads will last twice as long. pulling a trailer is safer and is awesome. I hate automatics and can not tell you how to shift it for best results. it sounds like you have a jake. it is old style technology and does not work as good as the pac or bd. learn to use it and if you ever start traveling with a 5th wheel consider upgrading to a bd. I also see in your sig you have a pos K&N air kit. you need to get it off and into the trash immediately if not sooner. I hope you have not had it on very many miles, go back stock or if you no longer have the parts get a 6. 7 air box, psm kit, cool hose and T. A. G. here is a pix showing the 6. 7 box and the air chuck and switch added to the bd as shad described for air. #ad

 

[Shadrach]

CKelley1 How did you know I have a 6. 7 air box on my truck Actually I did it because of the Kilby air compressor. The lid opens the opposite way from the 5. 9 making it easier for me. Did you find the TAG made a difference? I was thinking about the PSM as well. I have the stock 6. 7 tube from the box to the turbo to help keep it quiet.

Carl Is there a name on the canister? Can you post a picture of it?

Shad

 

[RVTRKN]

RVTRKN- Don't think my transmission was upgraded for eshaust brake when installed. Don't know anything about them, how they operate,etc. That's why all the ?????s. LOL

I realize you are asking questions for a reason, but in your sig, it was possible that your trans was not capable and that should be your starting point. I think you should contact ATS and find out if its been upgraded, I can't imagine they wouldn't of done it as a standard practice for upgrading the auto. I never set up my 04. 5 with an exhaust brake, so what I know is what I've read here. What has not been mentioned is that the vacuum pumps for the Jacobs EB has a high failure rate and BD or Pacbrake using the electric air compressors gives you other options like Airbags and other pneumatic accessories as an advantage. If I still owned my 04. 5, I believe I would have chosen the Pacbrake EB as well as their airbags.

 

[JHumphries]

Thanks Shad, I do see a little canister with a plunger on the back side of the stock turbo. Is this the exhaust brake. I guess using an exhaust brake is like doing 60 mph and shifting it down into second. LOL

Make sure you are looking at the elbow after the turbo. I don't know for certain, but you might be seeing the waste gate actuator for the turbo.

Someone please chime in if there is no waste gate on this truck.

 

[HBarlow]

Not really. That's just repeating what someone else has written here and it is not always an accurate indication of quality or durability.

The failure rate of Jacobs exhaust brake vacuum pumps has been exaggerated here.

I had a vacuum pump failure on my '06 Ram 3500 at somewhere in the 60k miles range and replaced it with a new one purchased from Cummins. The replacement was still working great at 230k miles when I sold the truck. Simple arithmetic would show the second vacuum pump lasted more than 170k miles. I don't see anything wrong with the OEM vacuum pump.

 

[carl07230]

What is a PSM and I think that is the waste gate actuator I was looking at. Thinking of going with a S &B setup with scoop(whole nother thread probably) ideas?

 

[carl07230]

T. a. g. ????

 

[Shadrach]

Turbo Air Guide http://puredieselpower.com/Tech/tagpdf.pdf It's one of those things that you either swear by or swear at. Shad

 

[CKelley1]

carl after rereading I agree with others, you were looking at your waste gate actuator. read shadarch post over very carefully, he concentrated nearly everything you need in a understandable way. I live in the mountains and tow very heavy, by choosing the correct gear and using the eb I can descend a one mile 9% grade with a cgw of 44,000 lbs and never touch the truck or trailer brakes. I run a fleet of dodges and have four brands of eb's. if you buy a new eb avoid the jake like shadarch and I stated. because of patient infringement problems the pac and bd achieve the same results using different means. I like the bd the best because of where the compressor is mounted. the pac compressor like shadarch's kilby is mounted where the heat and engine vibration greatly reduces life. we relocated our pac compressors. shad the T. A. G. helps the most towing. the 6. 7 stock tube has a very good design straightening vane that has less restriction than the tag at full rpm load. carl I just noticed the ? with the tag. the tag is a straightening vane. it along with the silencer ring reduce side shear in compressor side of the turbo increasing turbo efficiency. a psm kit is a 4" hose out of the bottom of the airbox to get more cooler air. to save a little money some go to home depot and get a dryer vent tube. there is where the ( home depot kit) term came from.

 

[carl07230]

Thanks Kelly. I throwed away the silencer ring many years ago without knowing. (dumb). Just saw a advertisement for the new AFE cold air intake. Looks like it's still getting all the air from the engine bay. Looking at your sig, what are air tabs, taylor wings?

 

[CKelley1]

the air tabs and taylor wing reduce air drag for better mpg. the air tabs help on the trailer also. they are the white tabs seen in the pix. the wing is on the top.
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[CKelley1]

the air tabs and taylor wing reduce air drag for better mpg. the air tabs help on the trailer also. they are the white tabs seen in the pix. the wing is on the top.

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[carl07230]

>Kelley- Man them air tabs defenately look different. Where did you get them and how do you figure out where to put them????? Thanks for the info