yep heard them too but i'll guarentee that running in instructions were not followed
hence why mine is having the fueling problem sorted on a rolling road to rule out any lean running/ detonation issue
and as i'm taking car back to ireland it should give it a work out
plus the fellas at mv have already said they'd done a good job
also i run the engine in like you would a bike engine i.e every 500 miles increase rev limit by 1000rpm im now just over 1000miles so i only take it to 4000rpm with the odd short burst to 5000 but only in top gear so i'm hopeful it should be ok
i may be talking to soon only time will tell but i'll let you know