Does this sound right?? High elevation folks step in

Chicago1 · 10-22-2009, 10:11 AM

With my manual I made 269/280 uncorrected 316/334 corrected(or is it the other way around???) I'm at 5200ft above sealevel with the DA being in the 8.5k range best run was 13.8@104. Mods when dynoed was intake and catback. Most C5's dyno about 250-260 up here and run low 14's/high 13's from what I see. If I convert it using this link http://www.carcraft.com/techarticles...ing/index.html it state that at sea level I would run 12.92@111 does that sound right? Most other guys at sea level with those mods seem to run about that maybe a 1-3 mph less. I have raced a few modded sti's and evo's that dyno about 350-360 to the wheels and I can inch them out but they stay right there with me from a roll for a few gears so my numbers seem about right.

here are my dyno sheets first run made 310 second was 316 nothing changed this was just to get a base run no tuning.

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Since these runs I have installed a ported TB, removed screen from maf, vararam air bridge, smooth coupler(I know whoopie) and relocated maf closer to TB. I want to go tune it to see what I pull but how do they numbers looks? Again real numbers for this elevation are around high 260/270 hp and 290's torque.

highpockets · 10-22-2009, 10:58 PM

Sounds OK,NA at altitude is a real killer ! I truly feel your pain,every time I see someone post a negative DA run ! Godd DA for us is Low 6000,high 5000. BTW,be careful how close you move the MAF to the throttle body.Just had a customers car come in that was hitting the throttle blade on the bridge inside the MAF at 80-100% throttle causing car to go into limp mode(idle only)

Chicago1 · 10-24-2009, 01:22 PM

Yeah after I did that the car runs really lean I kinda figured that's about right. Gonna have to get a tune or something.

Thalomos · 10-24-2009, 05:20 PM

Quote:

Originally Posted by Chicago1

If I convert it using this link http://www.carcraft.com/techarticles...ing/index.html it state that at sea level I would run 12.92@111 does that sound right? Most other guys at sea level with those mods seem to run about that maybe a 1-3 mph less.

I used this for conversion:

http://www.dragtimes.com/da-density-...calculator.php

It's nice because you can pick the day when you went to the track and it'll show weather stats for the day and give you a converted estimate based on temp elevation and humidity. I have no idea how accurate it really is.

Anyways, I went 111.23mph with my car, which converted to 112.xx on the conversion. I have a '98 with just a cat back exhaust, so I would not be surprised if your numbers are correct, you just have a good running car!