Neil, have you ever had anyone or yourself take one of your cylinders to the strip and see what it will run just for giggles? I ran a 8.75 in 1/8th with my ESR 350 stroker and thought it should be a good bit faster. I dont really have much to compare to except a nearly piped yfz running low 9s and a radical raptor running 7.2s and a crazy banshee running 6.5s