Family project truck, needing feed back

We've had it since 2007. Haven't driven it since last winter but I think it was 1750 at 60 rpm. Yeah it's a screamer. Good fuel mileage tho.

 

As long as it suits you the owner/driver that's the only thing that matters.

 

Not possible.
The 6.7 has a variable vane turbo. That is what they use to slow the truck down.
They do this by closing the vanes on deceleration to make boost and back pressure.
The pack brake for the 6.7 is an add on aftermarket deal . I think what your talking about is there add on valve actuated jake brake like your truck has.
So combined with the vgt turbo it has great hold back power.

So basically your truck already has a jake but would need to have a vgt turbo to be the same as a 6.7 . Just not going to happen.

 

You could probably mount an exhaust brake behind the turbo though if you have the room. I've never seen a jake/exhaust brake combo so it'd be interesting.

 

That's what I wanted to do to my series 60.
After looking into it and getting information from a guy in Australia that actually did it, I come to the conclusion it don't work very well.
Exhaust brake is a great alternative if you have no jake at all , but together not the best results.
A jake combined with a vgt turbo like the ISX is a great combo thou.

 

The back pressure from the exhaust brake must cause some issues with the jakes when they're run together.