I got a deal on one, so I decided to go with the sensor instead of the tone ring mod. After the test drive tonight, here is what I've noticed thus far:

-Engine idles smoother
-Less engine rattle
-Throttle response was increased
-I noticed a pretty decent increase in bottom end grunt as well

I'll post my fuel mileage gains later!

 

What exactly is this?

 

Thats what I was thinking. I have heard of these but what are they?

 

I have one and run it with my XZT. I have been happy with it.

Performance items

 

Its a modified crank position sensor that allows you to adjust, advance the timing up to 2 degrees. It gives you more bottom end, up to 2mpg increase. an suppose to lower EGTs as well. They retail for somewhere around $70-80 bucks I believe? I gave $40 shipped for mine. If I get the 2mpg increase in fuel mileage, it will pay for itself in 2 tanks.

 

I wouldnt hold your breathe on the 2mpg. you should see .5mpg. I havent read on any of the cummins sites that anyone got 2 or over 1

 

I read a couple of guys getting up to 1.5mpg so we'll see. I'm happy with the current benefits that I've already experienced.

 

How much you gain in added fuel mileage will depend on what your right foot does with the gain of low end power.