I was wondering if anyone here has had their power FC tuned for around sea level and then went say 6000ft higher(Colorado Springs) without getting it retuned. The reason I ask is cause I just had a lot of work done at KD and I'm considering taking the car back to Colorado but I don't trust anyone to retune it up here. And even if I did I don't want to have problems when I get out of here(Air Force)getting another retune.
Just wondering if it will adjust enough on it's own, if not then I'll leave it back home.
Thanks, Jerry

 

I have been wondering the same thing.....anyone out there have an answer????? I know when you buy the Apexi Boost controller kit that it makes the stock boost sensor read atmos. pressure while the new boost sensor reads boost pressure. But I am not sure how the PFC account or makes adjustments with this new reading.

 

Well me and my buddy came from New Jersey to Denver with his third gen with a stock ecu. About midway through kansas the car started to act like **** and continued until we put the PFC in it. Yes it dose make a big difference being at atltitude, if it was tuned for sealevel. Some good tuners know the charecteristics of being at altitude and can tune your car at sealevel for high altitude. Im bringing a tuner to Denver in March so if your car is out here you are welcome to get it tuned by him. If so PM me your nubmer and ill give you a call and let you know whats going on. Thanks
Marc

 

I was wondering if there is anyone else with evidence that shows that the power FC must be retuned for higher altitude. I am going from sea level to about 5000 ft above sea level. How are you supposed to travel if the PFC can't compensate for altitude change? Thanks

 

The only thing that really should be different is it may pull a different vaccum. The boost may go up or down with altitude change, but it shouldn't because it is dependent upon the turbo back pressure and not how thick the air is. As long as the boost is the same, the worse thing I could think of is it might just run alittle richer due to the thinner air which has less oxygen.

 

About a year ago I moved from Tulsa OK(~600ft) to steamboat springs CO(~6700ft). My car does not run quite as strong up here but A/F ratios did not change that much. Like mentioned above it is only a hair richer. Altitude really affects N/A motors and turbo motors much less. But at altitude your turbo will be working a bit harder to compensate for the thinner air. The only change I really remember tweeking is my idle just a hair. But I did not do this through the commander.. I just adjusted it under the hood.