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interesting results from 5,280ft.

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Hi everyone. Past few weekends have been fun in my lgt5mt sedan. I live in Colorado and decided to post my results.My cars mods: uppipe(catless), gutted stock dp, elec.boost controller (15 psi), intake slncr removed.


2004 Pontiac GTO 6spd (intake, exhaust)

on a roll in 1st to 90mph, I'm 2 car lenghts in front


I'm pleasently suprised with my car and continue to like it more everytime I drive it.

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i would be interested in getting together some time to hang out and shoot the $hit if you guys are interested in getting together. i live at lincoln & peoria and would beinterested in seeing what other people are doing to their cars. i am still contemplating what i want to do.
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Yes, altitude and turbos go hand in hand, and those same hands can often

beyotch slap NA cars that would usually lay the smack down at lower altitudes.


I could tell a couple stories about my GTI 1.8T at 9000 feet too.


But one I always refer to is a test a few years back by MotorTrend (I believe).

They were testing station wagons.

Two of the wagons they had were the

BMW 540i

Volvo S40 Wagon


We're talking 282 hp V8 in the BMW vs. 160 hp 1.9 liter Turbo in the Volvo.


They mentioned how the BMW would easily lay it to the Volvo at sea level, but when

they went up to 10,000 feet in elevation, they "played" around with the two cars

at freeway speeds, and they stated how the little Volvo would hang right on the

BMW's bumper all the way up to 120 mph at 10,000 feet.


Very nice

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I've walked on almost every NA car I've raced so far (at 6,000 ft). That includes a WS6 "Ram Air" Firebird. a car that should be an unfair match for a Legacy at sea level.


The only NA car that has beaten my OBXT so far: a brand, spanking new C6 Vette.


Here's an interesting link to the NHRA altitude correction factors: http://www.nhra.com/tech_specs/altitude.html . Note that "Supercharged and/or turbocharged cars (i.e.: AA/A, AA/AT, BB/A, BB/AT, A/PM and AA/PM) use half factor," i.e. they feel SC/TC cars suffer only half the losses due to altitude.

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Just did some quick calculations based on the NHRA altitude correction factors. I'll use a 2005 Mustang GT as an example:


Mustang @ sea level: 13.9@101.4

Mustang @ 5,800 ft.: 15.0@94.1


LGT @ sea level: 14.3@96.2

LGT @ 5,800 ft.: 14.9@92.7



source for sea level data: Road and Track

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