Air compressor for exhaust brake? - Dodge Cummins Diesel Forum
3rd Gen. Performance Parts Discussion Discussion of Performance Parts For the 3rd Gen Trucks No Advertising ...NO ADVERTISING

 
LinkBack Thread Tools Display Modes
post #1 of 7 (permalink) Old 08-08-2019, 04:27 AM Thread Starter
Newbie
 
Join Date: Nov 2017
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
iTrader Score: 0 reviews
Air compressor for exhaust brake?

So I pieced together an exhaust brake kit for my 03. Got a bd brake, the dfiv and AutoLoc. Made a regulator to control air pressure. And put a cheap air compressor with a tank on it from eBay. Brake works and all but the air compressor will drive me mad having to listen to it! So I’m wondering which air compressor I could use in place. Been looking at the viair ones and and am not to sure which duty cycle I need and which one would work best. And how would I wire it in and plumb it in? Current compressor is run off key power. If I just got a viair comp would I just hook up to the exh brake switch wire to run the compressor? And would I need a cut out switch to shut the compressor off at a certain pressure? Thanks

Crocky125 is offline  
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old 08-08-2019, 09:21 AM
Diesel Freak
 
CTD NUT's Avatar
 
Join Date: Feb 2008
Location: Caistor Centre, ON, Canada
Posts: 529
Thanks: 14
Thanked 82 Times in 68 Posts
iTrader Score: 0 reviews
I run a Viair 480C with my Pacbrake. The compressor runs on board air for several other things in addition to the brake. The brake does not need much air to operate so even the smaller Viair units will work just fine along with a 1/2 gallon tank.

As for wiring, the compressor should run on a relay so key on power only energizes the coil on the relay. You will need to add a pressure switch in line on the positive or negative side of the coil on the relay so the switch cuts power on and off as needed. I would also recommend adding a safety blow off valve on the tank so if there is an electrical failure that causes the compressor not to shut off, you won't have an over pressure situation. And you will also need to add a pneumatic solenoid to actuate the brake.

03 3500 QC DRW 4x4 6spd-6.7 Swap w/DPS S475/ported HE351 Twins, Smarty MM3/Calibrated Power tuning, F1 60 HP sticks, Pacbrake PRXB w/5" Flo Pro exhaust
CTD NUT is offline  
post #3 of 7 (permalink) Old 08-08-2019, 10:28 PM Thread Starter
Newbie
 
Join Date: Nov 2017
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
iTrader Score: 0 reviews
Thanks for your reply! Yeah I looked at those options and think I’m going to run a viair directly on the brake supply line and maybe put a tee in so I can use the air on my airbags as well. That way the compressor should hardly ever have to run or just for a short burst to top up the line once it sucks down a little when the brake engages. As far as I can see that’s how bd hooks their compressors up.

What air solenoid would you recommend? Currently got 1 normally open and 1 normally closed solenoid to control air.
Crocky125 is offline  
Sponsored Links
Advertisement
 
post #4 of 7 (permalink) Old 08-12-2019, 09:45 AM
Diesel Freak
 
CTD NUT's Avatar
 
Join Date: Feb 2008
Location: Caistor Centre, ON, Canada
Posts: 529
Thanks: 14
Thanked 82 Times in 68 Posts
iTrader Score: 0 reviews
You would want a high quality constant duty normally closed solenoid for brake actuation. Don't cheap out on this solenoid as it can see a lot of use if the brake gets used a frequently. The solenoid doesn't need to flow much air so it doesn't need to be large. One with 1/8" NPT ports will be fine as the brake actuation system only needs to be plumbed with 1/4" plastic tubing.

03 3500 QC DRW 4x4 6spd-6.7 Swap w/DPS S475/ported HE351 Twins, Smarty MM3/Calibrated Power tuning, F1 60 HP sticks, Pacbrake PRXB w/5" Flo Pro exhaust
CTD NUT is offline  
post #5 of 7 (permalink) Old 08-12-2019, 09:49 AM Thread Starter
Newbie
 
Join Date: Nov 2017
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
iTrader Score: 0 reviews
Okay that seems easy. So just a solenoid with an in and out port (2 ports)? Do I need a solenoid to dump the air or will the brake release on its own once the air gets shut off?
Crocky125 is offline  
post #6 of 7 (permalink) Old 08-12-2019, 01:16 PM
Diesel Freak
 
CTD NUT's Avatar
 
Join Date: Feb 2008
Location: Caistor Centre, ON, Canada
Posts: 529
Thanks: 14
Thanked 82 Times in 68 Posts
iTrader Score: 0 reviews
Quote:
Originally Posted by Crocky125 View Post
Okay that seems easy. So just a solenoid with an in and out port (2 ports)? Do I need a solenoid to dump the air or will the brake release on its own once the air gets shut off?
It will be a two position with three ports. When the pressure side is in the normally closed position, the brake side is vented to atmosphere though the third port. On some solenoids, the third port is small and cannot be used for anything else.

03 3500 QC DRW 4x4 6spd-6.7 Swap w/DPS S475/ported HE351 Twins, Smarty MM3/Calibrated Power tuning, F1 60 HP sticks, Pacbrake PRXB w/5" Flo Pro exhaust
CTD NUT is offline  
post #7 of 7 (permalink) Old 08-14-2019, 01:17 PM
Cummins Enthusiast
 
sfpcservice's Avatar
 
Join Date: Jul 2013
Posts: 295
Thanks: 5
Thanked 29 Times in 23 Posts
iTrader Score: 0 reviews
I used this exact valve:
https://rover.ebay.com/rover/0/0/0?m...2F291234881682

It has a Max pressure of 120psi so I put a cheepo regulator in front of it set at 110 psi and it runs the brake just fine and makes a nice air release sound when it turns off. Also you'll probably want to consider adding a tank to the system.

You can check it out towards the end of this video:
https://youtu.be/RQIR8NOMwxU

Advertising link removed by staff
sfpcservice is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Dodge Cummins Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome