Hello all,
I've got an '08 F350 SRW Crew cab SB that got about 15 mpg when new and totally stock. Put a leveling kit and 35's on it and mileage dropped to 13. I made the call to Spartan to see what all the hoopla was about. They were very friendly and helpful, so I decided to order right then and there. Got the tuner with pre-loaded tunes (including the nutty prof.), the intake, and exhaust with dpf delete for $2000. Took me one day to install all the parts in my driveway, with the tuner being the easiest of the three. The results? Unbelievable! My mileage went up to 20 highway and 18 city. What about power? More than I could have hoped for. Truck makes well over 500 hp at the wheels (650 at the crank) and more than 1100 torque. If black smoke is your thing, just turn the tuner to the highest setting and it will bellow out ungodly amounts at WOT. If not, then just keep a more conservative 210 hp setting and it drives just like stock until you mash the gas. The truck will spin 35 inch tires in four wheel drive. It's got that much power to spare. Keep in mind that my truck is heavier than when I bought it new. I've added front and rear Fab Fours bumpers, a Warn 16.5 winch, and a solid Diamondback HD tonneau cover. Plus the larger tires. All that extra weight means worse fuel economy, but with the Spartan kit, I'm still getting around 20. That leads me to believe a standard or extended cab short bed with stock tires might get 25 mpg's with the Spartan tuner. Can you imagine?
Now what about issues? Ok. Will the tuner negate my factory warranty? Well, yes and no. If you have to take the truck in for service, you will need to return everything back to stock and re-install the factory DPF. How about breakage or other problems. I've had no breakages so far, and I do not baby my truck. So hard not to stomp on the fast pedal all the time. It's too much fun. I will say that on my truck, it is necessary to power break the transmission before a launch to lock up the TC. If I don't do that, it will sometimes be very jerky in the power delivery. Once it did come up with an error code that basically said the transmission was not shifting properly. No harm, no foul on the vehicle. It was my fault really. It just went into limp mode, so I pulled over and used the tuner to reset the trouble code right then and there. Took all of about 30 seconds. Problem solved and it hasn't done it since. That is the price you must be willing to pay for big power. Are you?