XCal 2-33" Tires

[Sean M 2]

Hey Guys, I'm seriously considering the purchase of an XCal2. My ST is lifted with 33" tires and the performance, especially around town, is very sluggish. I was wondering if those of you whom have oversized tires running an Xcal2 would let me know if it restored your performance/gas mileage at all. I currently get around 200 miles to a tank, and would like to get this figure to hopefully the 13-15 range. I also have an ebay intake. Thanks for any help you can provide.

 

[Chad Merry]

Your mileage is not correct due to the tires. My ST has 33" tires and runs very, very, well with the XCAL2. I also have a custom exhaust system with the "Y" pipe which helps it breathe alot better as well.



Get an XCAL it is worth every penny.



Chad

 

[Mike Dziubina]

yea you definitely need an exhaust too man! i have it lifted on 33's with a K&N intake kit and dynomax exhaust. i am getting 250-300 miles out of a tank city driving. but i admit, i am a feather foot. look into an exhaust. i dont have the x-cal2 but i have heard nothing but good about them. it all comes down to $$$$$$$$

 

[EddieS'04]

With the 33" tires, it would help alot if you upgrade your gear ratios to 4:56 to 1...

You would regain some of the low end torque that you had with the stock tires..

 

[Todd Z]

The speedo is going to be off with the tires, You can calculate by how much and then you will know your true MPG..



I calculated your speedo is off by about 15% That can add up....



YES the Xcal is highly recommended, and I sell some stuff to help that ST go baby go !!!!!



George C has 285/75 on his ST and it gets up and goes now, I know the tires are not as big as yours, but you should feel it go !!!



Todd Z

 

[George C]

Sean,

I have the same setup as you without the body lift. I have 285/75/16 tires and the TT & Shackle lift and have the XCal. I do have a lot of mods besides the xcal but I can definitely say thte xcal gave me the best performance increase. I went for the performance tunes, not mpg but mpg did increase slightly. Definitelty a very noticeable increase in power though. What other mods do you have besides the intake? I would recommend one of Todd's throttle bodies and then an exhaust.



You should take a ride out by us one day. I don't know what part of Long Island you are from but it shouldn't be far. This way you can see what performance gains you can get. I would also like to see what a body lift can do for my truck



BTW, the way I calculated my mileage is off by 9.2%. Todd, how did you get 15%? My original tires were 255/70/16 and now I have 285/75/16. If they are really off by 15 that is even better.



George

 

[Todd Z]

LOL.. my bad, I am tired for some reason...



Yes 9.2% is correct... I was using 60 series not 70 for the stock tire..LOL



AND Sean any weekend your welcome to stop buy, take the ST for a drive so you can see what it would be like... Plus I could pick your brain on the Body lift. I know GC is wanting to do one..





Todd Z

 

[Sean M 2]

Thanks for the advice guys..It is greatly appreciated. I think I'm going to take the plunge for an XCAL2. And yes the next Long Island meet I certainly plan on attending.