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Old 08-18-2002, 12:33 PM   #1
Scooby Newbie
Member#: 23084
Join Date: Aug 2002
Default WRX at Altitude

Has anyone else had issues driving their WRX in the high country?

I took a drive up lookout mountain last week and discovered that the car suffers horribly from low end acceleration.

Does anyone have any recommendations? As of now I have not done any modifications to the car.
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Old 08-18-2002, 01:42 PM   #2
Scooby Newbie
Member#: 15667
Join Date: Feb 2002
Chapter/Region: RMIC
Location: Denver, Colorado
2004 STi
Alpine White


That is to be expected. Our ecu takes an atmospheric pressure reading and makes some adjustments from that. The air is also less dense, the turbo has to work harder for the same amount of boost. If you order a unichip be sure to tell them the altitude that you will be using the chip at.
There is a guy from Divide (9200 ft.) who has no problem with his unichip.

If you want a better low end try a downpipe and an uppipe. ScoobySport makes some great claims about thier exhaust pieces. I am planning on ordering one of each this week.
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Old 08-18-2002, 10:23 PM   #3
Scooby Specialist
Member#: 8351
Join Date: Jul 2001
Location: Alabama
2002 WRX Wagon


There's no doubt about it, the altitude saps even a turbo's strength once you exceed it's critical altitude. I haven't noticed any problems with any of the mods I have. Actually, last winter when it was -20f one morning on my way to Vail, I overboosted going up the pass by Breckenridge (can't remember it right now, ~11K feet I think) on Hwy 9. But that was back when the TXS unichip had that funky replacement restrictor.

If I were doing it all again, I'd probably start with the parts in a Vishnu stage 0, since I felt good gains from a muffler (scooby sport), pulleys (GFB) and boost controller. I kinda did the Turboxs stage 2+ by adding pulleys, colder plugs, and uppipe. I love my Turboxs stuff, though. It has all been top quality, especially the exhaust. And their new UTEC has some promise.

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