A club here in Sydney, Australia runs a 1/10 scale Le Mans race once a year. They run the cars non-stop for 2 hours and 24 minutes.
From memory they have never had an engine blow in the 3 years it has been run. (20 cars each year one the track ant the same time)
Their website is
www.pdnracing.org.au.
Cheers
The OX