I had my old 33 gtr tuned at bel and it ran 11.7 @121 mph @wsid on 18" street tyres . The only mods , full exhaust , power f/c and 1.2 bar boost , everything else stock , even stock airbox .
Ben knows his stuff and he has the jap software for power f/c's .
He doesn't have a dyno but he is moving very soon and then he will have a 4wd dyno .
When i finish my r34 it will be tuned by bel , thats for sure .