I mean, have you used the e-manage, or you are just listening to Ash?
I agree with Ash that the emanage can drive you crazy but that is if you try to up the injector size by 150%, and try to run some crazy timing like Ash. Ash has tuned severtal cars to 30+ degrees on teh topend, so the stock ECU+e-manage willnot do that successfully.
Yopu know my opinion: standalone all teh way. S-AFC and e-manage is for the stage 3-5 cars.