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Old 01-10-2005, 11:33 AM   #15
Scooby Specialist
Member#: 36528
Join Date: May 2003
Location: florida
2002 Impreza Wrx


Yeh, it's kinda questionable what will happen when the temp changes with your mods. I would say that it would be a good idea to put the trims to 0 on an average day(not hot or cold) so that when the temp changes it won't throw the fuel trims way off, but ya never know what will happen to the a/f ratio at boost when the weather changes. It would probably be good to get them to 0 on a cold day, a hot day and a medium day(3 different maps) and test what happens to the a/f ratioat boost when the weather changes to the opposite and in between. Ie, maybe if ya set the trims to 0 on a cold day and the weather gets warmer, the a/f ratio might lean out too much. If ya set the a/f ratio on a warm day and the weather gets colder, the a/f ratio might not get rich enough for the added air. Ya never know what will happen, but after testing you will most likely be able to figure out which way is the best/safest for your setup. Course this is all just my opinion, and I'm no expert.

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