Yep, just had my RB26 mapped with AEM EMS. Works really well if you ditch the CAS and run Crank/cam sensor. Makes about 520 bhp on stock engine, HKS cams, large injectors, steel standard R34 turbos. You need to find a tuner who is experienced with AEM. However, if you can map ecu's, I should think the AEM software will be easy for you to use though.