Newb alert...Sorry to ***** this thread but I have a question regarding your comment...

If a car were tuned for 5,000 MSL (SLC, Utah) via AccessPort on 91 Octane and then driven at 1,000 MSL (Texas) on 93 octane, what kind of changes could I expect? If the more dense air here in Texas is matched with the fueling of the 5000 MSL tune, would that give me Lean AFR's? Would I have to be worried about knock with subtle daily driving until I got it tuned at Cobb in Dallas?

TIA!

 

higher boost leaner afr... but 93 oct should make it ok since the higher octane...

I live at 5000ft and my 2byte load is 330 and load calc is 300. Now when I go to sea level they are exactly the same. so the whole thing about load going up is very incorrect!

 

The biggest problem is that you are likely hitting very different load sites at the lower elevation then when it was tuned at 5000'.