Diagnostic engine/car sounds.
We need bad and good sounding engines.
This can be used as a diagnostic sound library.

What does your HIGH Performance gasoline engine sound like?
http://www.peachparts.com/shopforum/showthread.php?p=1068452


What does your STOCK gasoline engine sound like?
http://www.peachparts.com/shopforum/showthread.php?p=1068447


What does your diesel engine sound like?
http://www.peachparts.com/shopforum/showthread.php?p=1068381