Originally Posted by Garage19
Another mis-conception is that an engine has to go through a certain amount of heat cycles before it is run in. I think people believe that parts get heat treated as they are run??? Heat treating of engine parts is done at a temperature far in excess of that which will be reached by a running engine. Well at least one that has oil in it and is not welding itself together!
I was advised to use plenty of full thermal cycles as possible in the first 100 miles by my tuner. This was nothing to do with running in the motor but was of benefit when running a tubular exhaust manifold.
I was also surprised to be allowed a max of 5krpm from 100 miles on.
Good Thread
