Pike's Peak
 

So I just graduated, but before leaving Colorado I drove up Pike's Peak (with hptuners scanning of course). We only made it to 11,500 ft because the other car we were with blew a a radiator hose and i had to drive back down to buy one and after that it was starting to get late. Anyway, after I got back to San Antonio I did a log on the same tune to compare. This is with my ve table mostly done, but with a granatelli maf plugged in and no tuning for the maf yet. So here are the results.

Pike's Peak
~11,500 ft
Atmospheric pressure: 66 kpa
Idle MAP: 33 kpa
http://i2.photobucket.com/albums/y31.../pikespeak.bmp


San Antonio
~800 ft
Atmospheric pressure: 99 kpa
Idle Map: 52 kpa
http://i2.photobucket.com/albums/y31/pmac727/SA.bmp

I'd say the maf does a pretty good job of dealing with altitude. I should have done a speed density one when i went back up the second time with the hose but i didn't think about it in time.

One interesting thing is, I think the BARO value is
set at key-on on these cars. Then the manifold
vacuum calculation, which for starters indexes your
IFR table, uses that as the baseline. I wonder how
that all rolls up, if you begin at 90kPa ambient and
end at 65kPa on a single startup. Pressure reg is
also atmospheric referenced but real time.

Thats the advantage I have of tuning here in Holland, its as flat as a witches tit, and I'm always at sea level (or just under :) )