Dave , when Lenny called me after receiving the spec sheet that I E-mailed him we talked in depth for about 1/2 hour and I let him decide what was best thru his experience and he told me he was going to set mine at 5200, I didn't take the time to verify it last weekend with so many other things to pay attention to so maybe I can get that done at the Chrysler Power Classic @ National Trails this next weekend and see how close he got it, I know it pulls like a freight train tho.