I have a 16 VX Deluxe , my friend has a 15 VX Deluxe. His four cylinder is a lot quieter and smother than my 3 cylinder, but im just a bit faster than him. The noise factor seems a bit irritating at times even at idel. Has anyone tried lining the inner well with the stuff they use in race cars ? I understand heat dissapation could become a factor. Any thoughts ?