ebpv-exhaust break
Post Fiend
Joined: Jul 2005
Posts: 14,582
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From: 21791
big rigs don't have exhaust brakes. they have an engine brake, of totally different design. you get no where near the same amount of engine braking HP with an exhaust brake that you can get with an engine "jake" brake. the exhaust brake only makes a loud hissing noise. it is hell on the manifold to block seal and the valves (if pressure is high enough, you can float a valve) but i dont think that is possible with the stock EBPV. that is a van turbo concern. i adjusted the jake brakes on a detroit series 60 yesterday, so i know all about it, totally different from an exhaust brake. exhaust brake is no where near the sound of an engine brake.
i dont have one, in fact im removing mine because i dont use it. if you want more on the concept of the engine brake or the exhaust brake, just holler.
i dont have one, in fact im removing mine because i dont use it. if you want more on the concept of the engine brake or the exhaust brake, just holler.
Posting Guru
Joined: Dec 2004
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A Powerstroke can NOT be retrofitted with a Jake brake. The engine wasn't designed for it. As strokin_it7.3 said, it is an <i>engine</i> brake, not an exhaust brake.
An exhaust brake helps, particularly if you are pulling a load in steep areas. But you have to have the engine revving pretty high - well over 2000rpms to get any decent effect.
AND - if you have an automatic, the torque converter must be locked or you'll lose most of the exhaust braking effect in the slipping TC.
An exhaust brake helps, particularly if you are pulling a load in steep areas. But you have to have the engine revving pretty high - well over 2000rpms to get any decent effect.
AND - if you have an automatic, the torque converter must be locked or you'll lose most of the exhaust braking effect in the slipping TC.
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Elder User
Joined: Aug 2005
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From: Dallas, Texas
Ahh....I use mine maybe twice a week (14,400# load) no EGT issues and it does slow the truck. It's more of a downshift aid. I can slow the truck with the EBPV until about 1800 RPM, then I go down a gear.
So at the top of a hill seeing 890 on the pyrometer, on the downslope with the EBPV I get 900. I do not notice any significant increase in egt's with its use. Then again I don't let it get up to 1000 (which is real hard to do on my truck) and engage the EB at 3000 rpm.
So at the top of a hill seeing 890 on the pyrometer, on the downslope with the EBPV I get 900. I do not notice any significant increase in egt's with its use. Then again I don't let it get up to 1000 (which is real hard to do on my truck) and engage the EB at 3000 rpm.
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Lead Driver
Joined: Jun 2003
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From: Damon (South East Texas)
strokin_it7.3,
Some big rigs do have exhaust brakes, instead of "Jake brakes". The company, I work for, has several late model Freightliners, with Mercedes diesel engines, that have exhaust brakes. Not as effective as an engine brake, but helps.
Some big rigs do have exhaust brakes, instead of "Jake brakes". The company, I work for, has several late model Freightliners, with Mercedes diesel engines, that have exhaust brakes. Not as effective as an engine brake, but helps.
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
I use my EBPV as a brake as well and the EGT never gets too hot even going down a 6% grade 24,000LB gross weight.
It's a pretty easy job if you want to do it. I made a write-up about it last year.
https://www.ford-trucks.com/forums/s...d.php?t=268610
.
It's a pretty easy job if you want to do it. I made a write-up about it last year.
https://www.ford-trucks.com/forums/s...d.php?t=268610
.
Posting Guru
Joined: Dec 2004
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I don't understand how an exhaust brake <i>could</i> cause high EGT. Sure, it doesn't let exhaust out - but high exhaust temperatures are made by burning fuel. When you are using an exhaust brake, you aren't using the throttle, so no excess fuel OR high temp exhaust is being pushed in behind the turbo. Since the exhaust isn't being let out, it makes sense that the EGT would not drop - or could even rise slightly - but to rise high enough to melt the turbo would require (I would think, anyway) higher temp exhaust than is being produced by an engine with not-much-more than idle-quantity of fuel being injected.
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Yeah, there is no EGT issues using the brake like that. It might be slightly higher on decel using the brake than if you were not, but that would simply be from the heat of compression, not burning any fuel in the cylinders.
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