I know this topic of increasing fuel mileage has been beat to death but I thought it would be interesting to know what others have done that they can HONESTLY say has increased their fuel economy.
Here is what I have done:
Predator programmer: maybe a small increase (1 mpg) maybe
4"...
I just installed my Duramileage custom tuned ECM and took it for a short test drive. It is pretty impressive for 65hp/100tq (better than the 65 hp Predator tune that I have been running). Now we will just have to see if the mpg gains are in there some where.