Thinking about Jake brakes.

[kennyv]

So I was just thinking about exhaust brakes and real Jake brakes for our 5.9. It's a shame no one makes a real Jake for our trucks. The exhaust brake is a great option but a bit of an issue with us owners with autos. So I was just thinking about the 3 cylinder idle. What if a person could engage the 3 cylinder after releasing the accelerator peddle? Would it be a hybrid Jake/Exhaust brake? Would it work? Would it brake or bend things?Thoughts?Sent from my iPhone using Tapatalk

[Mopar1973Man]

Just need a lock up controller. Like CajFlynn he HAD a exhaust brake on his 01 Dodge truck till he wore it out. As for 3 cyclinder high idle it will only engage if.Coolant temperature is below 140*FThrottle is at 0%Brakes are not applied (service brake)Intake Air Temperatrue Sensor is below +15*F Then it will engage... As for using the exhausr agains 3 cylinder high idle all you get is a truck that heats up very rapidily to 175*F and then is cancelled. Exhaust Gas Temperatures (EGT's) will be roughly 800-900*F (stock) my RV275's can push 1,000*F easy...

[mr.mindless]

It's a shame no one makes a real Jake for our trucks.

very much - the exhaust brake is really a disappointing thing.

So I was just thinking about the 3 cylinder idle. What if a person could engage the 3 cylinder after releasing the accelerator peddle? Would it be a hybrid Jake/Exhaust brake?

wouldn't affect a thing. all 3 cyl does is kill fuel delivery, that makes the motor take more effort to idle but wouldn't affect decel at all.

[kennyv]

Ah, thanks. I wasn't sure if the 3 cyl was just a fuel thing with the VP or a bit more than that. I can see if you just cut the fuel it wouldn't do much on deceleration. Sent from my iPhone using Tapatalk

[AH64ID]

The reason an engine brake isn't made is due to the size of the valve train, there just isn't room. An exhaust brake works great, and I personally wouldn't feel safe towing without one now that I have towed with one.

[mr.mindless]

that's the only thing that can be played with without the valvetrain involvement an actual Jake provides.

[kennyv]

...just so I understand the exhaust brake working with my auto...The exhaust brake WILL work well if the torque converter locks up (in my case, 3rd and 4th only) but will do little to nothing in 1st or 2nd as my stock trany never goes into lockup in those gears!?Correct ??Sent from my iPhone using Tapatalk

[Mopar1973Man]

Correct. But here is the problem you need to insure the torque converter stays locked up to get the use of the exhaust brake but the transmission will not shift down if the torque converter is locked up forcably. When you manually lock the torque convertor the transmission will shift up normally but never will down shift till you unlock the torque converter.Ask CajFlynn about his lockup controller.

[Eforbes]

Yes you need a way to keep it locked on decel, cause stock unlocks converter when coasting, which would take away the effect of the exhaust brake.

[Rogan]

Caj needs to jump in here and elaborate... ;)

[KATOOM]

Just throwing this out there but I understand Pacbrake is now making an engine brake for the 6.7. Not sure if the 5.9 will ever see one, nor if there's even any room for one.

[fire176969]

Just throwing this out there but I understand Pacbrake is now making an engine brake for the 6.7. Not sure if the 5.9 will ever see one, nor if there's even any room for one.

Would definitely need a body lift on a 2nd gen for one to fit. Just sucks the valve train isn't heavy enough to handle it. Sent from my DROID BIONIC using Tapatalk 2