ebpv as a jake brake?????
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From: Bonney Lake, WA
I had it on my truck for a while, before I decided to gut the EBPV. When I had it, it worked quite well. It would work even better on a manual tranny truck, because the torque convertor unlocks whenever you touch the brake pedal on a truck with an automatic, and that wouldn't happen on a stick shift truck.
I wouldn't say it works as well as a B-D exhaust brake, but it only costs about $20 to do, and it works pretty well.
(Technically, it's an exhaust brake, not a Jake Brake, since it doesn't alter the valve timing like a Jake Brake does.)
I wouldn't say it works as well as a B-D exhaust brake, but it only costs about $20 to do, and it works pretty well.
(Technically, it's an exhaust brake, not a Jake Brake, since it doesn't alter the valve timing like a Jake Brake does.)
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From: waterbury
hey thanks for the info also does give ti that exhaust break sound when it is activated cause i am gettin dual 5 in stacks soon and i am wondering if when its activated the exhaust noise increases
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From: The Great Plains
Originally Posted by blue96psd
hey thanks for the info also does give ti that exhaust break sound when it is activated cause i am gettin dual 5 in stacks soon and i am wondering if when its activated the exhaust noise increases
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From: NorCal
Originally Posted by Jacobs Website
FAQ4:
Do you make a product for the Ford 7.3L Powerstroke or Navistar International T444E engines?
ANSWER:
No, Jacobs does not offer an exhaust or engine brake for these engines in fact, Navistar and Ford have requested that we do not develop one for these engines.
The primary concern with putting a retarder on these engines is their use of hydraulic lifters. Most engines with hydraulic lifters have fairly low exhaust back pressure limits so the performance of an exhaust brake would not be substantial. More importantly the use of an exhaust brake on an engine with hydraulic lifters can cause engine damage. The problem is that the increased back pressure resulting from the operation of the exhaust brake will cause some degree of valve float. This valve float can cause the hydraulic lifter to re-set with the valve still open (not seated). This phenomenon is known as lifter jacking. Lifter jacking could also result if a traditional engine brake were used on these engines. The results of lifter jacking can be anything from low positive power (because the valves stay open) to engine damage caused by valve to piston contact.
Do you make a product for the Ford 7.3L Powerstroke or Navistar International T444E engines?
ANSWER:
No, Jacobs does not offer an exhaust or engine brake for these engines in fact, Navistar and Ford have requested that we do not develop one for these engines.
The primary concern with putting a retarder on these engines is their use of hydraulic lifters. Most engines with hydraulic lifters have fairly low exhaust back pressure limits so the performance of an exhaust brake would not be substantial. More importantly the use of an exhaust brake on an engine with hydraulic lifters can cause engine damage. The problem is that the increased back pressure resulting from the operation of the exhaust brake will cause some degree of valve float. This valve float can cause the hydraulic lifter to re-set with the valve still open (not seated). This phenomenon is known as lifter jacking. Lifter jacking could also result if a traditional engine brake were used on these engines. The results of lifter jacking can be anything from low positive power (because the valves stay open) to engine damage caused by valve to piston contact.
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Cummins?
Why does the "jake" brake work for Cummins and not for the PSD? I know several Cummins owners that have the brake. What's the difference? Just curious. Is it just the makeup of the motor?
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From: Western Slope, CO
[QUOTE=cgl]That's taken directly off of the Jacob's Website... Sorry but no Jake Brake's for us..
Actually, if you read that closely it says no exhaust or engine brake. The engine brake, or Jake Brake, has to do with closing the exhaust valves down to create backpressure, as I understand it. The exhaust brake, which is what you would fit on a PSD as explained in that quote, creates backpressure by restricting the flow of exhaust gasses just before entering the downpipe. What I find most interesting, though, is that the Ford manual says do NOT install an exhaust brake. The Jacobs quote says they don't make one for the Ford because engine damage could result. Yet, Ford uses one, essentially, to warm a cold truck up..... hmmmmm.
Actually, if you read that closely it says no exhaust or engine brake. The engine brake, or Jake Brake, has to do with closing the exhaust valves down to create backpressure, as I understand it. The exhaust brake, which is what you would fit on a PSD as explained in that quote, creates backpressure by restricting the flow of exhaust gasses just before entering the downpipe. What I find most interesting, though, is that the Ford manual says do NOT install an exhaust brake. The Jacobs quote says they don't make one for the Ford because engine damage could result. Yet, Ford uses one, essentially, to warm a cold truck up..... hmmmmm.
Post Fiend
Joined: Aug 2002
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From: Denton,TX
[QUOTE=wingit1x]
I'm willing to bet that the backpressure applied is not as much as an actual exhaust brake. That's why if I were going to install an exhaust brake on my truck I'd use the existing valve and not an aftermarket valve.
Originally Posted by cgl
What I find most interesting, though, is that the Ford manual says do NOT install an exhaust brake. The Jacobs quote says they don't make one for the Ford because engine damage could result. Yet, Ford uses one, essentially, to warm a cold truck up..... hmmmmm.
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From: Central OH
I have had the Ford valve kits on both of my PSDs, manuals, and love 'em. I figured they couldnt do whole lot more than when the valve was closed warming up, and it makes a pretty good difference. Still have to hit the brakes, but not nearly as hard. I bought mine off ebay for 70.00 or so.
I tow a large gooseneck, and it makes a difference there too. The noise isnt the deep load Jake sound, more of a jet plane engine. Very "airy" I can turn some serious heads in parking lots, but only when your foot is off the gas. When you hit the gas, it opens the valve, and it sounds normal. I also run a 4" exhaust all the way back, so that helps too.
Digger
I tow a large gooseneck, and it makes a difference there too. The noise isnt the deep load Jake sound, more of a jet plane engine. Very "airy" I can turn some serious heads in parking lots, but only when your foot is off the gas. When you hit the gas, it opens the valve, and it sounds normal. I also run a 4" exhaust all the way back, so that helps too.
Digger
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The engine brake, or Jake Brake, has to do with closing the exhaust valves down to create backpressure....
Actually is does the opposite, a Jake opens the exhaust valves at about TDC of the compression stroke. It also spools up the turbo creating more pressure for the piston to work against. When I'm running the Jake on my Cummins ISM the boost pressure comes up to about 20-25 psi.
Actually is does the opposite, a Jake opens the exhaust valves at about TDC of the compression stroke. It also spools up the turbo creating more pressure for the piston to work against. When I'm running the Jake on my Cummins ISM the boost pressure comes up to about 20-25 psi.
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From: Dededo, Guam
Remember our diesel have no throttle plate or throttle body. On the intake stroke, the cylinder gets a healthy air charge. It then gets compressed. With little or no fuel being injected or any restriction in the exhaust stream (other than the exhaust turbine) the now compressed air now forces the piston back down. Using compression braking on a diesel is next to useless without a exhaust brake or a jake.
The engines that can be fitted with a true jake brake have cam operated injectors. when the driver flips the jake on the engine uses that cam to provide the timing for the jake. At the top of the compression stroke when the fuel is usually injected, the exhaust valves open up releasing all that compressed air. Now the piston has nothing to push it back down. Thats how the jake works.
The exhaust brake just created a big restriction that the engine has to work against on the exhaust stroke.
The engines that can be fitted with a true jake brake have cam operated injectors. when the driver flips the jake on the engine uses that cam to provide the timing for the jake. At the top of the compression stroke when the fuel is usually injected, the exhaust valves open up releasing all that compressed air. Now the piston has nothing to push it back down. Thats how the jake works.
The exhaust brake just created a big restriction that the engine has to work against on the exhaust stroke.
Fleet Owner
Joined: Jun 2004
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From: Rio Rico, AZ.
Originally Posted by blue96psd
i have seen mods that turn the ebpv into a ghetto jake brake anyone have this ? does it work
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From: Forest Hill, MD
Originally Posted by Kwikkordead
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