For 400 bucks, buy the tuner, then you can retune your ficm even if you have to replace it, or upgrade to 58v later. Plus you can play with them and try the one that works best with what youre doing. Say you need to tow 15k lbs out of the blue, i wouldnt do that on atlas 40, let alone 80 or higher, but come time to make a full power run its nice to be able to ring it up a notch or two. Personally i like having options, not confined, to one tune. Plus, if you wreck or sell the truck, you can sell the tuner and make some money back, it might have to get "unlocked"...check with bill on that. Id recommend for the extra couple hundred bucks, that itd be worth having the options of switching between them to find a optimal combo for what youre doing between vivians or whoevers ecm tunes youre running, and the right ficm tune for mileage.
For the record i bought vivians 58v ficm (lifetimewarranty) and then the ficm tuner from php. Tuned with the herc, 58v, and looney wild with 175`s its very responsive, very snappy, and very hot with stock turbo, lol. Adrian is going to help me with egt"s soon with a hybrid, as soon as i get his heads to him. Anyway, my 2 cents
Last edited by Gearhead2012; 01-20-2013 at 09:43 AM.