here are some speed stats for ErupTran users:
Max speed Eruptran (w/ scarf): 227 (340)
min speed Eruptran (w/ iron ball, etc.) 143 (71/72?)
Max speed quiet (252- Speed) Heatran speed ties with positive base 54, neutral base 64 and, of course, negative base 77 (I think Heatran's the only base...