Originally Posted by
Glowgeek
P/S, Listening to that Webra in the vid, it sounds like predetonation transitioning off idle. Could be the nitro content is too high, maybe bad needle adjustments, or maybe the cam timing is off too far. Don't know, but it doesn't sound happy throttling up. Makes me cringe.
I noticed that too, but in all fairness, I have at times searched for ages for similar sounds, that I finally identified as a rattle in my testbench, and these folding worktables are known for having a rattle here and there.
It could very well be that it detonates or pre-ignites (it sure sounds like it, no doubt), it is just hard to tell with this kind of testbeds.