Hi all, I'm in a unique living situation and have a question about tuning. I'm from Colorado and stay here over summers but I go to school in Louisiana. Colorado does not have many 93 octane gas stations and I would be tuning my car in Colorado so I would be tuning my car on 91 gas. Would I be able to keep the Colorado tune on my car and use Louisiana 91 gas while I'm down south? The car should be able to adjust for the change in barometric pressure (5000ft to 0ft) however I'm concerned about running the lower octane 91 at sea level.

 

From reading your post, you said both places have 91, so it shouldn't be a problem..

 

only thing to keep in mind is to not push the car hard when going back down to sea level until it has learned the altitude otherwise it might overboost. I might be wrong on that, but just a thought.

 

Pretty much wrong. Most tuners don't use the boost correction stuff on these cars. When they do use it, it simply reacts, it doesn't have to "learn". However, his tuner in CO needs to be aware that the car goes to sea level, and leave the boost a few lbs low at altitude if tuning with an MBC or not using the boost error corrections.

 

Good info. I'm in CO too and will be moving soon. I need to have some discussions with my tuner before getting tuned.