Originally Posted by
romain_f
Good point Bishop, lighter cars don't break more often, the design is just better!
But let's say an engine running the same RPM on a 1550 g car and a 1700 g, don't you think the engine will last longer on a lighter car?
I don't remember who told me this, but I think it was a suggestion from Robert Pietsch himself
An engine will wear out faster in a lighter car, since it spends more time in high rpm's. And we all know rpm's kill engines. With a lighter car the engine has less resistance to spool up and spends a longer time at higher rpm's since you can accelerate earlier and brake later.
When you limit the size of the exhaust port you will automatically set the maximum amount of rpm's in a way, not exactly.
However the tricky part is, how are you going to police this rule?. It's not possible to disassemble every engine to check the exhaust port size.