Quote:
Originally Posted by Casper
Sound is very directional and sending it to the ground is a common way to reduce the level heard, nothing new there but a good idea a lot would not know.
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You not only need to watch the noise coming out of the engine but the air being sucked in can be noisy so make sure you have a decent air filter in there to help mute that as well.
A car at a Winton 6 Hour Relay many years ago ran out of things to try to quieten it down until someone suggested it might be induction noise.