I decided to purchase from Ebay, this cheap MOD I saw and figured I would give it a shot. It is the "UTP", or Ultimate Tuning and Performance chip that adjusts the air/fuel mixture. It just attaches to the MAF wire that leads into intake tube before it reaches TB.

It was cheap, and I figured nothing lost if it didn't work, I didn't really figure it would do too much, but with my 90+miles a day commute, it was worth a shot to get a bit more juice from the Hemi.

At highway speed, 65-70, I was averaging about 18 mpg. After I installed this little thing, I am noticing a pretty decent improvement to 21mpg. If I go easy on the 'ol lead foot and keep the speed at just a tick below 65, with the cruice control on, (flat highway) I am averaging 22-23 mpg. Well over 430+ miles per tank. No improvement for around town, and I tend to stab the throttle at green lights.....hemi.

I have a stock intake for now, (all the fixings to build my 4" CAI in my garage with no time) with no other real mods.

20 bucks-not a bad return on my investment.

 

Is this another name for the "power wire"? If it is, you coulda made that for like 5 bucks yourself. It may not be the same thing but it sure sounds like it.

 

sounds like it to me...less than 5 bucks johnny...

 

Sounds like those cheap ebay performance chips we see all the time that claim outrageous numbers.

 

I think also that you are only seeing MPG gains because you are more aware as it's on the motor now. So you may drive a little more conservatively. I've not heard that a power wire adds MPG's. I may be wrong, but I thought that the power wire only worked at WOT.

 

Yes it is a cheapo Ebay chip, the numbers aren't that outrageous and again- I wasn't expecting much. But my MPG have gone up about 3 or so, and I am driving the same as I always do-good 'ol cruise control. Can't afford another speeding ticket.

I didn't think I could do the power wire on a 2007, was looking around the site a while back.....