im sure i read somwhere that the mmm tune only does its job at 1600 to 2200 rpms,anything below or above the box does nothing,is that how it works,ive been workin in town all last week and with lots of in town driving lots of time i was below 1600,is it more of a highway type module for savings?thanx

 

any one have definate info on how it operates
thanx

 

bump

I would also like to know. I just installed mine tonight. I do about 80% freeway driving and that is also about 1900- 2200 RPM.

 

I have it also and have been trying to use it in stop and go and didn't see much difference. I do remember seeing Quad mention all trucks are a little different and most of the gain is seen at constant motion continuous speed type driving.

 

I downloaded the MM tune onto my box and ran it for a couple of weeks to see what it did for my mileage. My daily commute is about 85% highway and I saw a 1.5 mpg increase running the MM tune. I don't know what it would do for stop and go driving but I would think not near as much.