apepper

Just got 35 x12.5 r15 km2's and want my speedo to read right so I don't get pulled over by the po po. Anbody know how much the dealership charges for a re-calibration? I went to 4 wheel parts and of course they tried to sell me a tuner for 500 bucks.

Jeep Hound

the dealer cannot recalabrate for anything bigger than 32" tires.

The cheapest option is a PRO Cal Module runs about 125$-150$ takes 2 seconds to reprogram

if you have more money buy a bullydog tuner or superchips flashpack

apepper

Whatz the difference between the tuners, worth the extra money for the bullydog or superchip?

nthinuf

The ProCal is a 'Programmer'. It will calibrate for tires and gears, and has some other neat functions.

The Superchips/Diablo/Bully/Hypertech/etc are 'Tuners'. They remap the tuning to give more HP/Torque, and in many cases, better mpg's as well.

Worth the extra money is a judgement call, but most people that have tuners really like them. There are about a bazillion threads on these tuners, so just do some reading and decide if the benefits are worth it to you.

f3arn0FJ

I LOVE my bullydog tuner. It does everything I need and also has a display that shows alot of info. i.e trans temp, coolent temp, rpm, speedo..... I also gained some power over the hypertech programmer. It is a night and day difference between stock and performace tune on the bullydog. I also like the fact that I can put the jeep back to stock tune in under 15mins and plug it into another car/truck/jeep.

Sahara_Maverick

I also have a Bully Dog and like it. The real-time display is great.

However, beware that if you have a 2011 or newer the tuners may not work. It seems the manufacturers have been struggling with it for a while.