Quote from 5haz :

Haha I love how they've specifically outlawed reactors from the allowed engine types.

Does that include Warp reactors? Really interesting, so KERS system won't be obligatory and most likely don't give an advantage. And I want to see how you could win the race with a Stirling engine.

btw you got it slightly wrong, your quotes refer to the 2011 rules as far as I understand it. The 2014 bit is specially for the LMP2 class, and contains differen info