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boost question

1K views 5 replies 5 participants last post by  dumdum 
#1 ·
my 05 wrx is the first wrx ive owned, and i was wondering when boost kicks in. car is bone stock
 
#2 ·
2500rpm... full boost at 3500rpm

If you get a bellmouth downpipe and retune it, you can knock about 500rpms off of that. Your car will run better, make lots more power, and maybe even gain a mpg or two (if you can keep your foot off the gas)
 
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