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Old 01-14-2005, 09:37 AM   #2
hippy
Scooby Specialist
 
Member#: 36528
Join Date: May 2003
Location: florida
Vehicle:
2002 Impreza Wrx
Silver

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This is the way it was explained to me when I was having boost control issues(course I didn't beleive it at the time, since I was having boost creep issues and things didn't seem to work the way people explained them).... A gain of 50 makes the turbo spool at a given rate, and the boost might never overshoot the target boost. A gain of 55 will spool a little slower, and the boost might never actually hit the target. A gain of lower then 50 will help the turbo spool a little quicker, but the target will be overshot.

You can't counteract the overboost of a low gain by lowering the boost(since lowering the gain creates overshoot). ie- if the target boost b4 was 18 and the boost was shooting to 20 then went back downto downto 18, lowering the target boost to 16 would just make the boost shoot to 18 and go back down to 16(just an example, might not be totally accurate). Point being, try to get the gain where you can live with the amount of overshoot. 4.9 is obviously too much overshoot. Maybe you should try a gain of 48(or even 49) instead of 46?

peace
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