Sorry if this has been covered before...

I have an 08 w/ 3.73 gears and I will be moving from 33x12.5s --> 35x12.5s pretty soon. Aside from changing the tire size, what type of tune should I run? ( octane 87,93, light or heavy tow tune.. etc) Also, should I try and change the gear ratios? If so, how would I get the most out of it? Thanks !

 

What transmission do you have?

 

I had the Superchips in my 08...Definetly would recommend...
Had on 87 octane setting...

 

You pretty much need to try them all to see which one works for you. They all react slightly different.

 

You might wanna regear anyway w/35's. You'll definitely see the biggest difference with the higher octane tunes

 

Out of all the tunes I used I liked the tow tune the best it game me improved gas mileage like the 87 did but I also felt it had better acceleration

 

X2 on Tow Tune. I've run all of them and the tow tune seems to give the best mpg increase and power increase combined. The 87 isn't bad but I get a bit more low end torque with the tow tune and it seems to shift better when driving in the hills of the Berkshires here in new England.

The 93 tune rocks but my mpg suffers tremendously making it not very practical considering the price of gas today.

 

The tow tune was what I was thinking about doing. I have an auto trans, so Im pretty sure the tuner will respond differently. I also though that each tune would affect each vehicle differently. I can obviously run a 93 octune setting if im only putting 87 octane in?

 

Re-gear and tow tune