Originally Posted by Nano
My point was that these 2 EFRA requirements are considered as restrictions (made to limit performance and/or cost of the engine). Because of it's new technology the CRF engine is not restricted by these requirements. It does not need crankshafts with 7mm+ bore and funky turboscoops to be the fastest engine on the track even when competing with engines which are not EFRA legal.
The crankshaft that was used was the same 6mm crankshaft you get when you buy the engine. Modified cranks were tested but they made the car difficult to handle because of excessive power.
But, this was said on the other tread about this engine:
Originally Posted by ziggy12345
I asked if the CRF is EFRA and BRCA legal and Team Orion confirmed it is. I asked how this could be when the hole in the crank is more than 7mm but no response. They are using them at national level here and in Europe so guess they are legal.
I run mine on 25% Nitro as it didnt like 16% but not at nationals.
6mm, 7mm, or bigger......
