Re: How mileage engine - how reliable are plug in mods?
Get a 6 position custom chip. Much better tuning, shift on the fly. Power on demand. Way better than, "OK you wanna race, pull over here and give me fifteen minutes to reprogram."
By the way, I recommend Tony Wildman. But there a lot of good programmers on here.
Early '99 F350 DRW, Excab, LB. Auto. 2WD, 2010 bed, 2005 headlights, 298K, on my way to 1000K.
H2E, 238 Hybrids, Adrenaline oil, Tuned by Tony. DIY Regulated Return.