Bits and pieces of this are in 2 different places here so i decided to start a new thread on this. I'll list all prices and where i bought everything at the end. I'm doing this as cheap as i can, but the way i think will be most problem free. If you see something i did wrong or need to change let me know.

  I started with a used exhaust flange and vacuum cylinder. Took a few days to get the butterfly free and cleaned up but its working now. I had to buy a vacuum solenoid and i am using push to connect fittings and line for most of it. Reason for this is if i have to change to an air cylinder i wont have to change my plumbing.

 Amazon should have the rest of my parts here by Sunday so until then I'll figure out mounting locations and build the wiring harness. 

@gimmie11s i wondered about the hole size but never got around to looking into it. Makes sense what you're saying. I know the Pacbrake instructions i downloaded that covered the 12 valves said DO NOT USE WITHOUT UPGRADING THE EXHAUST SPRINGS. SEVERE ENGINE DAMAGE WILL OCCUR. Their caps not mine. 

 I did read a little about hole size online but did not research it enough.

 Wanna swap butterflies?

And for some reason the 1st 2 pics didn't work for me.

1 hour ago, Gregturley said:

@gimmie11s i wondered about the hole size but never got around to looking into it. Makes sense what you're saying. I know the Pacbrake instructions i downloaded that covered the 12 valves said DO NOT USE WITHOUT UPGRADING THE EXHAUST SPRINGS. SEVERE ENGINE DAMAGE WILL OCCUR. Their caps not mine. 

 I did read a little about hole size online but did not research it enough.

 Wanna swap butterflies?

And for some reason the 1st 2 pics didn't work for me.

 

 

Yeah, for some reason i coudlnt get the website to embed the pics.

 

Thanks for the offer on the butterfly, but i already opened my second hole up some.  I'll try it out and open more if necessary.  

 

If you end up welding your hole closed an re-drilling, my hole was 1/4" before i opened it up.  Shrinking the hole on yours should give stronger braking.

 

I also countersunk my bolt holes where the butterfly bolts to the shaft.  Then i went and bought countersunk bolts an nuts ... hopefully this will allow better exhaust flow through the pacbrake when not in use.

 

couple more pics,.. lets see if these will embed.

 

https://postimg.cc/7GgmdQ9x
https://postimg.cc/JHMPLcYj
 

 

 

Edited April 7, 20205 yr by gimmie11s

@Gregturley any idea if it would be safe to run the brake through the ECM 20 pin without a relay?  Basically PIN 20 would be in place of the throttle switch that was included in the kit.

 

I got my brake plumbed and tested how quick it actuates using the throttle switch and it is basically immediate as you cycle the momentary throttle switch off and on.. ..I really like this.

 

My thought is running it through the relay once i wire it to Pin 20 is going to slow down the operation of the brake.

 

Thoughts?  Quick video below

 

 

 

 

@gimmie11s a relay won't slow it down. A standard Bosch style relay switches in milliseconds and you'll never notice it. A relay will protect the ecm from excessive current draw thats why its used. I would not hook to pin 20 without a relay. 

 Pin 20 will give a slight delay between closed throttle and the command for brake operation. On my truck it was about 1.5 seconds. Works fine for me. 

 

16 hours ago, Gregturley said:

@gimmie11s a relay won't slow it down. A standard Bosch style relay switches in milliseconds and you'll never notice it. A relay will protect the ecm from excessive current draw thats why its used. I would not hook to pin 20 without a relay. 

 Pin 20 will give a slight delay between closed throttle and the command for brake operation. On my truck it was about 1.5 seconds. Works fine for me. 

 

 

TY sir.  Today I got mine fully installed using the relay per your write up.  My delay to brake engagement once throttle is lifted is about 1.5 seconds also. 

 

Works perfect!

 

Thanks again... you've been a huge help.

 

 

.

Edited April 9, 20205 yr by gimmie11s

Happy it worked out for you.