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popping and banging on over-run
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Old 25 Apr 2012, 07:39 AM   #1 (permalink)
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popping and banging on over-run

my 2006 hawkeye sti sometimes pops and bangs on over-run when driven hard,sounds quite good(even for a 42 year old) but is it a concern,or is it just running too rich,which is obviously better than running lean, mods are full mongoose de-cat,fpr,walbro 255,electronic bc and atmos dv.....just purchased the car and dont know if its had a remap unfortunatly plus only ever run her on tesco 99
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Old 25 Apr 2012, 07:48 AM   #2 (permalink)
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Re: popping and banging on over-run

boost control and atmos blow off valve removed and a proper remap,
its your BOV thats causing it as its chucking un-metered air out the engine goes wtf as it knows whats coming in but its not the same going out so it makes it rich to protect the engine.
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Old 25 Apr 2012, 11:10 AM   #3 (permalink)
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Re: popping and banging on over-run

first port of call get it checked out in its current form. Decats tend to make them pop and bang on over run, but i suspect its been mapped to put even more in. Extra fuel in over run isn;t a problem, so as long as the car is running right its fine. Good start will prob get it on a dyno and see how shes running. then go from there.

From your description doesn't sound like anything to worry about to me, if its been setup correctly int he first place.
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