sct2 optional parameter changes
03-09-2009, 05:26 PM
Thread Starter
Join Date: Apr 2008
Location: michigan
Posts: 4
sct2 optional parameter changes
i just added shorty headers and a 70mm throttle body. my car was tuned prior to this install. mod's made before the professional tune are borla cat back exhaust, and cold air intake. my question is should i adjust optional parameters? and if so which ones?
03-12-2009, 02:20 AM
3rd Gear Member
Join Date: Jan 2007
Location: NY
Posts: 695
I would say YES. Headers & 70mm throttle body might be too much for optional parameters to handle. Your A/F ratio will be way lean with these 2 mods. You will need to richen up from idle to red line.
03-16-2009, 05:19 PM
Thread Starter
Join Date: Apr 2008
Location: michigan
Posts: 4
maxed out on the rich and picked up the spark a tad runs great thanks.
03-19-2009, 06:36 AM
5th Gear Member
Join Date: May 2007
Location: Central Texas
Posts: 2,388
If you want to be sure, use your xcal2 and do some datalogging, and you'll see nice graphs of your O2 signals, fuel trims, air flow, etc.
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