Name that sound?

[ame]

Any guesses on the [albeit quick] clunky rattle sound at :03, :07 (faint) and :13? Driving me nuts.

Not sure if this helps, but from what I can tell:

Seems less prominent when I first start driving and gets worse after driving for a a bit.

Starting at an incline makes it worse but it still happens on flat ground.

Thanks in advance-

Didn't listen to the video...

Auto-ignition. Use better gasoline.

TexasRebel said:

Didn't listen to the video...

Auto-ignition. Use better gasoline.

Click to expand...

I'm currently running a stock tune with just a Borla touring exhaust installed. I was under the impression that 87 was fine. So, that's the sound of me being cheap with the 87 from Costco?

TIA

In reality it probably is "fine", but not optimal.

remember, the octane rating on the pump is the minimum average when tested. The average could have been higher, and any single tank can be lower. Not all 87 is the same. Knock sensors will generally keep any damage from happening, but at the expense of performance.

knocking/pinging will happen louder when hot and under load (uphill).

Thanks for this, man- Fixed it!