BD exhaust brake questions

[kodeman]

Hey all, So I picked up a BD exhaust brake off a buddy of mine that builds custom rigs.... The one is picked up is a 4" in and out, looks to be a remote mount option , as it does not bolt directly to the turbo. I think it was purchased for a cummins build . My question is , Can i mount this in my 1999.5 superduty? All i have is the unit pictured. I need to find out if this need a air operated or a vaccum operated brake. I looked on bd's website and short of calling them i didnt find much info. I know i will need the part from them that bolts to the shifter to operate it... Anyone else run a remote mounted exhaust brake? how do they work?

I got this for free btw... So a little money into it to complete isnt a big deal

Any help is much appreciated!

[Vdryv]

It will work
Most likely air operated.
Enjoy

[kodeman]

Ok, did what i should have before, called BD ... Tech guy says it will work .. i need a throttle switch and a vacuum switch... less then $200...

The brake IS vacuum operated.... BUT he said my 99 doesnt have a vacuum pump? Any ideas on aftermarket pumps i could put in? Dont the later years have vacuum pump for the hubs? if so are they belt driven or electric? Thanks guys!

[Zaairman]

Your 99 has an electric vacuum pump.

Just curious, but why do you want to add this? 1, an exhaust brake isn't recommended on these trucks, especially with an auto trans. 2, you can turn your EBPV into an exhaust brake if you wanted to for a lot less than this will cost you.

[jesilvas]

Originally Posted by kodeman

Ok, did what i should have before, called BD ... Tech guy says it will work .. i need a throttle switch and a vacuum switch... less then $200...

The brake IS vacuum operated.... BUT he said my 99 doesnt have a vacuum pump? Any ideas on aftermarket pumps i could put in? Dont the later years have vacuum pump for the hubs? if so are they belt driven or electric? Thanks guys!

You HAVE a vacuum pump. He's dumb.
How does your defrost change to vent and floor? Vacuum.

Originally Posted by kodeman

4" in and out, looks to be a remote mount option

It mounts in the exhuast. You have 3.5" exhaust.

Is this a manual or auto trans?

[kodeman]

@ Airman , I want to add because i tow my camp trailer 1 or 2 times a month and want some added braking to take the stress on the trans and wheel brakes... Question- why do you say they are not recommended on our trucks? My truck is a manual, I converted it over last year.

@ Jesilvas , I have an aftermarket exhaust on the truck, its 4" from the turbo then goes into 6" under the passenger seat.. So i have a nice open section to install the brake ..

Any clue to where the pump in located, before i go crawl around and search for it. Thanks guys!

[jesilvas]

The non-recommended reason I've always heard is that you could float valves since the springs aren't that strong stock.
If you know how strong your springs are, and if you can set the brake to release at a certain pressure, then you can be safe.
Oh, vacuum pump is on top of pass side wheel well. Bleed off the vacuum by switching vent selections with key off, then key on engine off, and you should hear the pump running.

[kodeman]

BD says the 7.3 is 40# ... 60# for the 12 valve cummins..

Pretty sure you can adjust the brake for more or less pressure .. i think thats all in the install writup i was emailed from BD..

Ill have to do some more research on the exact pounds to the brake at and if there is a way to measure that..

[HaysKSFirefighter]

If you decide against mounting it up, I will buy it from you

[jesilvas]

Second, whenever you increase exhaust backpressure, you need to make sure that the exhaust valve springs are capable of preventing the pressure in the exhaust system from lifting the exhaust valve from the valve seat, as this would result in a collision with the piston. Normal valve spring seat pressure is 70-75 PSI for NEW valve springs and deteriorates from there. Given that the surface area of the back of the exhaust valve is approximately 1.9 square inches, it would take only 40 PSI of exhaust pressure to lift the valve off the seat, even with new valve springs.
Off PHPs website