Engine/Power - EJ25T (STI and 2006+ WRX) Discussions about the USDM 2006+ WRX and WRX STi 2.5 liter turbo flat-four.

Knock or detonation

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Old Nov 28, 2007 | 10:15 PM
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From: Rockin my 6th Suby in the 808 in the past decade!
Car Info: 01 Impreza RSTi, 08 Evo MR, and 13 XV
Knock or detonation

can someone descibe to me what knock/detonation sounds like. read some other post here but still a bit confused

Jess
Old Nov 28, 2007 | 11:01 PM
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Car Info: '05 Impreza Outback Sport ~ "WTF! Two-Toned?"
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Originally Posted by 4080wrx
can someone descibe to me what knock/detonation sounds like. read some other post here but still a bit confused

Jess
Your Mom's Ford, running hard uphill and 'pinging' like Hell!

"Rattle-Ratttle-Rattle... Ping-Ping-Ping! Got 'er?
Old Nov 29, 2007 | 12:20 AM
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It sounds just like if you were shaking a can with
marbles inside of it.
Detonation=bad for engine
Old Nov 29, 2007 | 05:48 PM
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From: Rockin my 6th Suby in the 808 in the past decade!
Car Info: 01 Impreza RSTi, 08 Evo MR, and 13 XV
what about like popcorn popping sound. like towards the end of cooking cycle when a few are popping (slow enough to count accurately).

does detonation happen throughout the power band or just at high rpm/when on boost?
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