Tuning Question

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10-09-2009, 05:27 PM

loudnlow

3rd Gear Member

Thread Starter

Join Date: Sep 2009

Location: Idaho

Posts: 829

Tuning Question

okay so when i bought my car the guys at the dealer said it was tuned but im wondering how i would find out for sure if it is, and if i go buy a new tuner is it gonna work if my car is already tuned. and i am also putting stock tires and rims back on it tomorrow 235/55/17 and right now it has 275/45/20 so is that gonna screw with the tune and make it run like crap?

Last edited by loudnlow; 10-09-2009 at 05:35 PM.

10-09-2009, 05:49 PM

Nuke

6th Gear Member

Join Date: Jun 2007

Location: PA to KY ('07) to IL ('09) to MS ('10) to FL ('11)

Posts: 16,182

I'm assuming you bought it used. IF the previous owner had it tuned then he needed to return it to stock if he wanted to be able to unlock his tuner. From your post, it sounds like you didn't get his tuner. I'm not sure how that'll affect you down the road so you may want to contact Brenspeed's tech guys and ask their advice. IMO, I'd have the dealer reflash it back to stock and give you the new strategy code.

If you bought the car with 20's on it, I'm also assuming the speedo was corrected for it. Changing back to the 17's won't make the car run bad; it'll just throw the speedo off depending on the change in the overall tire diameter, which I calculate to be about 5.6 MPH higher if it was setup for the 20's. A handheld tuner will allow you to fix that.

Last edited by Nuke; 10-09-2009 at 05:52 PM.