Does my engine have a knock???
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Evolving Member
iTrader: (4)
Joined: Nov 2008
Posts: 112
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From: Westchester, NY
My vidcam was setup with the zoom mic on when i made the video, normal mic mode picks up a lot of background noise; so the vidcam setting was amplifying the engine sounds a bit.
I don't know what was up with my ears this time but i started to noticed sounds from the engine bay that i thought i never heard before.
So i made these videos to get some forum members' thoughts because i thought the knock was all in my head.
Now, the car is loaded with the generic 93oct Cobb Stg 1 tune for the last 1600mi.
Before that, i had loaded the Perrin Cobb AP Stg 1 map which i used for 6000mi.
The catback was bolted on last fall.
As for my driving style, it's text book granny-style driving.
Went to redline only once or twice, and never mis-shifted on highway speeds.
This is my DD so i pretty much baby this car. The worst thing that i did to the drivetrain was burning (or "breaking-in"
) my clutch from backing up on my semi steep driveway when i just got the car..i was not used to the high clutch pedal engagement point.
There's really no hesitation or odd behavior with the car when i accelerate, i simply needed opinion from from others.
So thank you everyone.
I don't know what was up with my ears this time but i started to noticed sounds from the engine bay that i thought i never heard before.
So i made these videos to get some forum members' thoughts because i thought the knock was all in my head.
Now, the car is loaded with the generic 93oct Cobb Stg 1 tune for the last 1600mi.
Before that, i had loaded the Perrin Cobb AP Stg 1 map which i used for 6000mi.
The catback was bolted on last fall.
As for my driving style, it's text book granny-style driving.
Went to redline only once or twice, and never mis-shifted on highway speeds.
This is my DD so i pretty much baby this car. The worst thing that i did to the drivetrain was burning (or "breaking-in"
) my clutch from backing up on my semi steep driveway when i just got the car..i was not used to the high clutch pedal engagement point.There's really no hesitation or odd behavior with the car when i accelerate, i simply needed opinion from from others.
So thank you everyone.
Ya, What's wrong with being cautious? To ME, that sounds to loud for injectors, but like I said it could be the Camera amplifying that frequency.
I just said have them look at it, your gonna tell me that's a bad idea? Plus you have no idea of the car's history. I am sure it's not the case, but this guy could have flashed his ECU with a 9000 rpm rev limit and when around redlining it. Do you know? Don't assume....
OP, if your truely worried, flash the car back to stock, put the Original cat back on and take it to the dealer... Mod reversal should take you 2hrs MAX!!!
I just said have them look at it, your gonna tell me that's a bad idea? Plus you have no idea of the car's history. I am sure it's not the case, but this guy could have flashed his ECU with a 9000 rpm rev limit and when around redlining it. Do you know? Don't assume....
OP, if your truely worried, flash the car back to stock, put the Original cat back on and take it to the dealer... Mod reversal should take you 2hrs MAX!!!
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