I just ran my pump gas 610 on the dyno. The build used a stock 39 fcr, stock pipe, stock filter, stock valve size, 10.9 compression, and stock air filter, my porting. And it made 58 hp at 7600 and 48 ftlbs at 5200. It also made over 50 hp from 5400-9400 rpm. I ran this on a dynojet dyno on pump gas. I will have my other 610 on the dyno in about 2 weeks with a pipe, 43 fcr, bigger valves, bigger cam, and higher compression, my porting, and a few other goodies. I think I can reach high 60's hp with my race gas 610. I will keep you guys posted.