About two or three weeks ago, I got my car dynoed and I was pushing 155whp... The shop said that there could be a 15 percent difference in it, so I'm not sure if I either have 178whp (with the 15 percent) or 155whp (without the 15 percent). But anyways, that's not what I was talking about. For a JRSC GSR, I know that isn't much at all. During the dyno, my car had horrible air/fuel ratio's all the way around.. Running too lean and running too rich. The guy said I needed a new ECU to fix my horrible air/fuel problem and he said I could get at least 40hp more with proper tuning. I'm running a stock OBD I GSR ECU. I've been thinking about getting a new ecu, but I can't make up my mind... Which would be better for my set up? Hondata s300? Greddy E-manage Ultimate? Any help would be appreciated. Thanks.