I got some 93 today and decided to load up my performance tune (from Troyer). I took a trip down the road to make sure everything was running fine, and one thing I noticed was that the MPH value on the speedometer is about 4MPH higher than the speedometer on my GPS Navigation is using.

I went back to my 87 octane tune, and the numbers match up.

Yes, I adjusted the revs/mile setting to deal with my larger tires. The same setting was used for both tunes.

Anyone seen anything like this? Hoping to get some opinions before I contact Troyer (I know they're busy).

Thanks.

 

I recently changed from Level 3 to Level 2 on my Edge Evo and although I've not verified with a GPS, the city I live in has radar speed signs all over and the MPH on my truck's speedometer is about 5 MPH HIGHER around 45 MPH. And unless everyone started driving a lot faster on the highways in the past few days, the problem is worse at higher speeds. What is even more strange is when I was on level 3, the same signs would show about 4 MPH LOWER than my truck's speedometer & the tuner read out! The settings for tire size and gear ratio are the same as before so I continue to be stumped.

 

Try to follow the steps in the link provided.
http://dygytalworld.ehost-services139.com/forums/showthread.php?goto=newpost&t=1101

OR

http://dygytalworld.ehost-services139.com/forums/showthread.php?p=9248#post9248