diesel freaks- any comments

Found this thread on a search and I know it’s old but I have some info. I bought both harness from diesel freaks and the adjustable dial. I run the dial on the middle setting number 5 and like always I calculate my fuel at every fill up. I’m in stop and go traffic all day weighing between 70-80k pounds. So for the past month I have seen between .3and and .7 mpg increase. Along with awesome throttle response all day. She does leave plumes of black smoke in between shifts when I get on the hammer but I’m one of those guys that likes a smoke show out of my 8” pipes. Always thought black smoke out of the pipes was money out the window, but the numbers don’t lie in my fuel log book. So whatever right. Here’s some video of the smoke

 

You save fuel by keeping you boost low.

 

Of course. But that’s not what this is about. It’s the fact that not changing your driving habits and whether or not the harness backs up its claims of fuel savings and throttle response

 

I was told by a very smart man that black or brown smoke between shifts is from giving too much fuel pedal before the turbo can spool up. Go easy on the pedal until the turbo can spool up and you'll see more of an increase in your fuel economy.

Black smoke is incomplete combustion. If you ever see black smoke, that's a clear indicator of fuel economy that can be improved.

 

Today's engines are not supposed to smoke. Much.

Older engines need a little time to generate the boost. Usually the throttle is on the floor most of the time. Even if it is on the floor in cruise or better, there is smoke. A certain amount. Not much but some. Combustion is imperfect in the older engines being what they were long before computers.

Basically your ear is the sensor to tell you where the turbo is at. If it's boosting big time it's a very high pitch. When it winds down, if you were able to complete the shift before it quits you can stay within the boost and spin it back up.

Fuel economy was less of a concern in those days. If everything is tight in connections etc, you can squeeze a engine out to 2300 or higher on a hand throttle for purposes of using exhaust to drive a turbo blower for your bulk tanker and you wont smoke once it's settled at that top RPM.

 

Would you happen to have the installation instructions? A cat dealer tool mine out for warranty purposes and now I want to out it back in. It was in truck when I bought it so I don't have any instructions