looking for an mpg tune for a stock 2004.5 lly with a mouthpiece. I also have an egt gauge. Im running basically a 20/20 tune but I am looking for a little more fuel economy as I daily drive it. i get 16.5 mpg on a good tank. i had a hot tune that got 18mpg but I had to be super easy on it or else it would throw me into a 2000rpm limp mode. looking for something in the middle. appreciate it guys.
would you be willing to post up the ones you got?
Post the tune you are running and the stock one. I have been playing with mine lately trying to gain a little MPG with the 6 speed swap I did. Desired boost plays a lot in the cruise areas for economy. Playing with Injection Timing I feel like I have gained a little as well.
2008 Denali XL AWD LSA Blower
2010 CTS-V
2005 LLY Duramax SAS
2015 Denali
LLY tow tune 8-26.hptFULL LLY STOCK TUNE.hptLLY HOT TUNE TP .85 to 2400rpm tire size.hptOriginally Posted by SUTTERERMAN85
here are the 3 tunes. The tow tune is the one Im running now, and the hot tune is the one that gives me good milage until i throw it in limp mode
Have you checked the milage or are you going by what the gauge cluster says? Im assuming that you have a stock trans and that hot tune is way too much for it. You will only be able to get so much out of these for milage. Best things that you can do is slow down and drive reasonable. I have also found to keep the desired boost low in the cruise areas. What size tires are you running and lift at all?
2008 Denali XL AWD LSA Blower
2010 CTS-V
2005 LLY Duramax SAS
2015 Denali
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