Subaru Enthusiasts Car Club of the Sierras - View Single Post

Dean · 2009-06-23, 11:54 AM

The biggest problem IMHO with tuning at altitude is when the intake calibration table is correct.

If you are running anything other than the stock intake or one there is a COBB map for, you are playing with fire if you don't spend a good amount of time adjusting that table which likely requires going up and down altitude.

At least some tuners do a lot of their fuel work in the A/F tables to get the O2 numbers they want, and if you have an improper intake calibration, you can get into real trouble when you change altitude because the barometric tables don't know that the intake calibration is wrong.

2009-06-23, 11:54 AM	#34
Dean Señor Cheap Bastarde Real Name: Dean Join Date: May 2003 Location: $99 Tire Store Posts: 9,294 Car: $.04 STI Class: Fast,Cheap & Reliable=STI Deal, did somebody say Deal? Oh, Dean, yeah that's me.	The biggest problem IMHO with tuning at altitude is when the intake calibration table is correct. If you are running anything other than the stock intake or one there is a COBB map for, you are playing with fire if you don't spend a good amount of time adjusting that table which likely requires going up and down altitude. At least some tuners do a lot of their fuel work in the A/F tables to get the O2 numbers they want, and if you have an improper intake calibration, you can get into real trouble when you change altitude because the barometric tables don't know that the intake calibration is wrong. __________________ I am a Commodore PET --- Now get off my lawn you kids...