exhaust brake mod
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Lead Driver
Joined: May 2007
Posts: 8,608
Likes: 13
From: Belair md
exhaust brake mod
ok i am too lazy to gut my ebp valve so i figured rather then have it dead (been disconected for 2 years) i would rig it up for the exhaust brake, took a whopping 15 minutes start to finish. it works great, loud as hell with 5 inch straight pipe. even worse for the guyu next to me when its idleing to warm up!
question is this, has anybody monitered ebp while this is fully engaged to see max readings on the motor? and where is neal at? didnt he have a manual gague hooked up to his for this?
question is this, has anybody monitered ebp while this is fully engaged to see max readings on the motor? and where is neal at? didnt he have a manual gague hooked up to his for this?
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Lead Driver
Joined: May 2007
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From: Belair md
aha! found the link
https://www.ford-trucks.com/forums/6...ake-today.html
he gets 38-42 psi on exhaust backpressure, i would think this is ok but i am still going to put one in to see what i am getting.
todd, i cut the connector off the engine harness and ran one wire to ground at the rear valve cover bolt and ran the other inside to a switch in my dash, for a power source i used the open fuse block in the dash that is for the airbags. if need be i can go snap a few pics.
i havent used it a whole lot until i can see what my gauge says but it does slow the truck a considerable amount. i found some really steep hills and it was like somebody was hitting the brakes on the truck.
also according to the manual the valve works off a 10 volt signal but i read that the actual pcm wire is battery voltage, i havent checked mine yet but i will be doing in in a while, if this is a true 10 volt system then i will need to instal a resistor to step the 14 volts down to 10 but i would imagine the wire will show battery voltage and i wont have to change anything
https://www.ford-trucks.com/forums/6...ake-today.html
he gets 38-42 psi on exhaust backpressure, i would think this is ok but i am still going to put one in to see what i am getting.
todd, i cut the connector off the engine harness and ran one wire to ground at the rear valve cover bolt and ran the other inside to a switch in my dash, for a power source i used the open fuse block in the dash that is for the airbags. if need be i can go snap a few pics.
i havent used it a whole lot until i can see what my gauge says but it does slow the truck a considerable amount. i found some really steep hills and it was like somebody was hitting the brakes on the truck.
also according to the manual the valve works off a 10 volt signal but i read that the actual pcm wire is battery voltage, i havent checked mine yet but i will be doing in in a while, if this is a true 10 volt system then i will need to instal a resistor to step the 14 volts down to 10 but i would imagine the wire will show battery voltage and i wont have to change anything
Post Fiend
Joined: Apr 2004
Posts: 12,835
Likes: 3
From: Silver Lake Dunes, MI
I was thinking the EBP soleniod was pulse modulated but not sure on that. One thing to think about is that back pressure is the same as boost pressure. 40 PSI boost is the high recommendation for headgaskets with out studs. Probably won't hurt anything but something to watch. exhuast valves may start to get pushed open at higher pressures as well. but also unlikely to cause any issue as long as you don't get crazy with it.
Posting Guru
Joined: Aug 2002
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I've seen a few hooked up w/out the resisitor putting the full 14v to the selonid. Haven't heard of any damage, guess I'm having a duh moment but would the extra 4v cause?
I thought I read in my one Exhaust brake package (western diesel) since the butterfly is closed with oil pressure too much back pressure would force the valve open...? I know the ford tech said WOW when the labtop was hooked up checking the trans (steep grade w/11k behind the truck) a couple years ago.
I thought I read in my one Exhaust brake package (western diesel) since the butterfly is closed with oil pressure too much back pressure would force the valve open...? I know the ford tech said WOW when the labtop was hooked up checking the trans (steep grade w/11k behind the truck) a couple years ago.
Posting Guru
Joined: Aug 2002
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Never thought about it too much, just kept an eye on the tach and ear on the engine. Use mine everyday. Unless I'm in a big hurry to stop the engine doesn't rev over 2500, even with heavy loads while using the brake. Adding a gauge would be neat though 
Used it on parents automatic for almost 3 years, and have had it on my 5 speed for a year now with no side effects to either
Used it on parents automatic for almost 3 years, and have had it on my 5 speed for a year now with no side effects to either
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Postmaster
Joined: Jan 2004
Posts: 3,207
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From: Kearney, Nebr
I had a resistor on mine and it (for better terms) fried the resistor and melted through my plastic wire loom that I had around it. The resistor was just crusty black. Not sure how that happened.
Im thinking about just running it without the resistor in it. Can 4v cause that much of a problem?
Im thinking about just running it without the resistor in it. Can 4v cause that much of a problem?
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Lead Driver
Joined: May 2007
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From: Belair md
if it is designed for a max of 10 volts then yes the extra 4 would burn it out in time but i cant see the pcm regulating 14 volts down to 10, it would be the only system on the truck running 10 volts. a multimeter will tell the tale
Senior User
Joined: Nov 2007
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From: taunton , ma
I have that on mine and love it. I run a two postion switch up is just high idle down is high idle with ebpv on very loud and fast warm up! The high idle only works if I put the e- brake on. I just flip the switch down while driving for the exhaust brake.
Posting Guru
Joined: Nov 2006
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From: Herndon KY
I monitored the EBP while driving with a skid loader, I engaged the brake at 2600rpm (I use straight voltage no resistors for over a year with no issue) max pressure I monitored was 28.4 psi. I think that if you let it run up to 3000 rpm you may start to have issues, but I use th rule of thumb not to let my truck ever get above 2700 rpm unless accelerating under load smoothly. and then not much above that any way.
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Lead Driver
Joined: May 2007
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From: Belair md
i hooked the ngs up to the truck today to moniter backpressure. at idle with the brake on it goes to 25-26 psi. at 2500 rpm with the converter locked it goes to 50 psi! i didnt go higher then 2500 due to the 50 psi number, thats too high for my comfort zone. even 2000 was at 45-48 psi with no load on the truck.
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From: THUNDER BAY
Originally Posted by c00nhunterjoe
i hooked the ngs up to the truck today to moniter backpressure. at idle with the brake on it goes to 25-26 psi. at 2500 rpm with the converter locked it goes to 50 psi! i didnt go higher then 2500 due to the 50 psi number, thats too high for my comfort zone. even 2000 was at 45-48 psi with no load on the truck.
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Lead Driver
Joined: May 2007
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From: Belair md
sorry, forgot to mention that, i did it engaged at around 1000-1200, (hard to hold perfect) it was at 33-35 psi.
also i got to thinking again, since the head gaskets are supposedly safe to 40 psi boost then that means that they are good to 55 psi ebp. as for exhaust valves, that i'm not sure when they will float......50 psi was ok, no abnormal feeling in the motor but i dont know about longevity.
also i got to thinking again, since the head gaskets are supposedly safe to 40 psi boost then that means that they are good to 55 psi ebp. as for exhaust valves, that i'm not sure when they will float......50 psi was ok, no abnormal feeling in the motor but i dont know about longevity.