Originally Posted by andyr74
I may be interested in a "Murnan Modified Sirio Evo 3 STI". Maybe full ceramic or not. But is this the Ifmar version or the Efra version? I have to race following the efra rules in europe.
Is the cranckshaft the only difference between efra en ifmar version?
Andy
EFRA has changed the rules as of November 2006 to match IFMAR rules, so there is no longer the restriction on cranckshafts. That's a good move because now engines are the same all over the world (except England, which I think will keep BRCA rules as old EFRA rules).
AFM