After reading the Flashpack write up in this forum I still have a couple of questions. I've been running 35's, 2.5 lift kit on a 07 automatic with 4.10 gears for over a year and I'm considering getting a Flashpack to improve horsepower without regearing. Since I'm new to the whole Superchips thing, what is it with the 91 or 93 tune? Is that 91 or 93 octane fuel needed? Meaning more $ for gas? I guess I could live with that. What kind of set up would you guys recommend based on what my JK has? It is worth it to pay $300 just to change your tire size settings? BTW, this is for a daily driver with minor off-roading.

One more....If I buy one used from somebody that owned a later JK model like 08 thru 10. Can I still use it on my 07?

 

Yes, the 87,91,and 93 tunes require you to use the corresponding octane. I just got my flashpaq this week and am using the 87 tune. So far it seems to be working well. I have 33's and 3.73's.

 

Thanks, and I imagine you can switch back and forth if you wanted to right?

 

Yeah you can switch between tunes whenever you like but it does take a little time to get the ECU to fully "learn" the tune. The programming itself takes 5-10 minutest but then you have to drive the Jeep so the ECU can apply the new tune to actual driving conditions. Correct me if Im wrong here techno masters

 

Yes takes time to change tunes and you have to stay in jeep while doing so. Have had this for about 2years now. Best money I've spent. Tow tune gives more low end and seems to modulate the idle best. For instance I tow a trailer a lot with a stick shift and would stall every now and then. With tow tune no stalling and more power right off idle. Shutting off tpms sensors and going to rubber valve stems also worth not tearing off those stupid all metal ones on the trail. Idle up works great for winching and charging battery/jumpstarting,but needs to be hooked up. All the other things it can do are great also. Beware if you buy a used one and tune still installed on another jeep it will be vin locked. Truly best bang for your buck

 

I have had one for awhile but never messed with shift points yet. Is there a good thread somewhere to walk me through changing shifts points. I know how to do it but don't know where to set them !!

 

Is the 3875 the best one? I see them for sale a lot on here and they go really quickly. I live in hawaii so any increase in MPH would be a help!

 

I got mine on Friday and plan on adding the tune today. I'm debating on if I want to start with the 87 tune or go right to the 93 tune. So far other than that I have a K&N Intake and Gibson Exhaust. Still stock Rubicon suspension and wheels with the 4.10 gears.

Is the 87 still a decent improvement over stock?

 

I am currently running that tune and seems like a good start. No matter what tune you go with you have to let the tranny "learn" for awhile

 

In the past I've heard that it's good to unplug the battery for xx minutes to clear out any learned behavior. Does that apply for these Jeeps or is it not necessary?