Hi rob Thanks for that again. Stale fuel was a lesson that was brought home when a Walter Micron engine I was sitting behind at the time blew a hole on the rear piston. The fuel in the Dimona was fresh that day when I had the first problem. Engine seems back to normal now
Best regards Ian W Sent from my iPhone > On 2/12/2019, at 11:23 AM, Rob Thompson <[email protected]> wrote: > > G'day all, > > A while back I recorded the sound of detonation and put it up on Nigel's web > site: > http://www.limbachaustralia.com/downloads-useful-information/ > > You need to listen to it on a good computer sound system. It is the > “rattling” type sound behind the main engine noise and it is quite subtle. A > lot of people think that detonation is loud and obvious but that is normally > the case just before your engine self destructs. > > As you engine starts detonating the RPM drops. Often the detonation will then > stop and the RPM will come back up again. Of course high loads and high RPMs > are the prime time. > > Stale fuel, particularly combined with high CHTs are the major culprits so it > tends to go away when you add fresh fuel to your tank. > > > regards > Rob > > Rob Thompson > 0429 493 828 >
