Has anyone seen or heard of a 300 I6 with a jake brake??? Some old timer said he had seen one while i was at auto zone today. the guy is off his rocker ? right??

 

yeah i think he might be off his rocker

 

Thank you !!!

 

If they make one, I want one!!!!

 

did ford make any of the I6s as a diesel motor?

 

I would refer you to my first reply.

On a more serious note, I'm kinda ate up with the whole Ford truck thing, no they didn't.

Will someone prove me wrong? Please! I think that'd be pretty cool, like in an early Bronco.

 

There really would be no purpose. A gasoline engine has lots of hold back power when you let off the gas compared to a diesel which has little or none. You can gear it down whether it's an auto or manual tranny going down a hill, and creep along pretty good. A diesel will just try to run away.

 

Sorry Dave, gotta disagree. How can a diesel have no "hold back" power when you let off the throttle? And- How do you think those of us who drive 18 wheelers get them stopped when loaded? My 6.9 in my 83 F250 has way more "hold back" power than any gas motor I have ever had. No offense intended.

 

Jake Brake of course!

On a gas engine, you have the throttle plate, when decellerating, the plate is closed of course, and the engine is trying to pull against it. On a diesel, there is no throttle plate, the air is able to freely enter and leave

 

How about an exhaust brake, It wouldn't sound as cool but would work.

 

The engine braking in a gas motor comes from the fact that the throttle plates are closed and the engine still needs to draw air into the intake which creates a near-complete vacuum in the intake manifold. Since diesels have neither throttle plates nor intake manifold vacuum, they have little to no engine braking.

 

What that ole timer mighta seen one of them heat diverter things..they look kinda like a Jake brake or an exhaust break...they're vacuum actuated butterflies and I think they're to help engines warm up quicker in cold weather......I love the sound of a Jake Brake........you'd think a dieselwould have no hold back power...as far as I'm concerned they don't...think about it...you've got a gear driven fuelpump free flowing air induction plus the forced air because most (if not all rigs) have at least one turbo......doesn't matter if your foot comes off the pedal....it's gonna takemore than alil bit of time for it to deccelerate...especially since most rigs are hauling how many tons?then you've gotta wait for the turbo(s) to spool down......good luck with that....Jake brakes do alot of good and they save the hell outta some brake parts.Remember...just cause it's got air brakes doesn't mean it can stop on a dime......if I ever see anyone cut one off...you better believe I get to rantin n ravin on the CB.Later all.......

JR

 

Ok- yall are right, I only drive em every day. What do I know?
My 6.9 has way more braking effect than any of my gas motors.
My jake in my big truck didn't even work for the first 6 mo I drove it.
We also have at work- a 91 with a windsor, a 91 with a 7.3 IDI, an 87 with a 302, a 97 with a 7.3 powerstroke, an 03 with a 7.3 powerstroke, and an 07 with a 6 liter powerstroke. My truck is an 85 mack, with a 350 mack motor. I have in my collection, well, just see sig.

I work on all of these trucks too.

 

I'm on your side, fellow diesel man.

Although they have some of the story correct with throttle plates vs open intake, the other folks have failed to consider the 20:1 (or slightly higher) compression of the average diesel engine.

I have driven the same truck (ranger) in one case, with a gasser and later with a diesel (exact same powertrain). Even though the gasser was 2.9L and the diesel was only 2.3L, the diesel had WAY more engine braking. It was also turbocharged, which by some one else's arguement, would also kill engine braking by increacing air flow (but not true in reality).

 

I'd like to see that X-cab run off LPG sounds cool.....but I've never seen one Just heard of em......350Inline Mack is a good motor and one of the first ones I ever rebuilt...