Here is a great pick of Thomas(Goinsideways QCB forum).
They started dead even, '06 Nightrain with cams, tuning, thunderheader...VS. stock engine '08 Sportster with Rinehart 2into1 exhaust, air cleaner, Powercommander. Got up to around 120, he lead by a bike length. Sportsters....small,fast,and deadly. Chopper Glory!