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Old 07-01-2011, 04:23 PM   #1
Flynlow151
Scooby Newbie
 
Member#: 77870
Join Date: Dec 2004
Chapter/Region: NWIC
Location: Fort Collins,Co & Issaquah,Wa
Vehicle:
2004 Subaru STI
TheBoostCreep Stage II

Default Change maps for road trip?

I am driving from Fort Collins, Co (4,900 feet) back to Seattle (500 feet) next week. Right now I have a protuned map for this elevation and fuel (91 octane). Should I revert back to a OTS map when I get to the lower elevation with better fuel (92 octane)? I don't plan on racing the car, but I am sure there will be some two lane hiway passing in my future. The car is tuned at 91 octane for:
K&N intake
FMIC
Walbro 255
NGK 1 step colder
3" turboback
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Old 07-02-2011, 09:51 AM   #2
Cobb Tuning
NASIOC Vendor
 
Member#: 4803
Join Date: Mar 2001
Location: Austin, DFW, Portland, SOCAL
Default

An FMIC is outside the scope of the OTS maps (as well as the K&N filter to some degree), so I would stick with your protuned map. The issue with going from a high elevation (where you are protuned) to a lower elevation, is that you will hit a higher peak load putting you in areas of the fuel/timing maps that you would not hit at altitude. Worst case scenario would be that these areas aren't accounted for (say the load axis is not rescaled), but most protuners understand this and account for this in your tune. I would check with your protuner to make sure. If you can't get a hold of them over this weekend, then just keep an eye on things via logging when you get down to the lower elevation (the default logging set is fine).

Bill
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Old 07-05-2011, 03:38 AM   #3
Flynlow151
Scooby Newbie
 
Member#: 77870
Join Date: Dec 2004
Chapter/Region: NWIC
Location: Fort Collins,Co & Issaquah,Wa
Vehicle:
2004 Subaru STI
TheBoostCreep Stage II

Default

Bills, thank you for your feedback. I am still waiting to hear from Harvey @ The Boost Creep for his recommendations.
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