Alright I did a search and didnt find exactly what I was looking for. I just want to ask those of you who have ran their turbo'd cars at sea level and at something above 5000' above sea level what were your time differences between the 2? I know people say that altitude affects your cars power output even turbo'd and that you might have to run a higher boost level to achieve the same times that you ran at a lower altitude? Is this true for your experience?

Im currently at about 5600' above sea level and the track is like 5700' my best is a 13.77 on stock boost from my SR20DET which is about 9psi I think I was just thinking what my time would be at a sea level track? Maybe a few 10ths faster I dont know? What is everyone elses experience with boost and elevation?

 

On my dataloges from SLC to Pamona without making any fuel adjustments my AF's were about the same. The only adjustments I made were with the boost controller. I picked up 5psi of manifold pressure from 4800 ft to 500 ft elevations.
I think my car is just as fast up here in SLC as it is in California but my intake temps are a little hotter do to faster shaft speeds and this altitude.

 

The only thing I have noticed between altitudes is the higher you get the more fuel you need to take away. I dont seem to run to far off my normal numbers. We just take a ton of fuel away.

 

So you guys dont really see any different times between the different elevations. I always get the question here that "if you were at sea level you would be running 12's" and I always tell them that elevation doesnt screw with forced induction engines like it does N/A engines and that I might run a few 10ths faster at sea level or whatever?

 

Altitude also can be affected by humidity, temp, and stuff like that. Although you might be at sea level, the corrected altitude could still be at over 1000ft. The better the air, the faster you will go, but I dont think it will be a huge gain for you