The exa turbo crank has no bad reputation its stronger than a series a14 or a15 as its a billet item with nitriding.
Head on turbo engines have smaller capacity chambers and flow much better than the econo heads there are about 5 different heads and the 15m is the high cfm champ.
http://datsun1200.com/modules/newbb/viewtopic.php?topic_id=12178&post_id=77945&order=1&viewmode=flat&pid=77826&forum=1#77945Just read whats been said already on aboce thread...
very few small engines produce such ballsy figures and are relitavely pollution gear free since they were introduced in 1980 as the e10,13,15.
220-230hp from 1240cc for speedway is no wimpy little engine.
The e series was nissans evolution of the A series a more compact, efficient and modern design. I just found out that an a12 crank can be made to fit the e series as only 82mm stroke billets come from factory for the e. The opposite of the A.