I,am familiar with happy dyno's, the conditions were perfect(cold&dry). I can only give stats on engine mods, that have been given to me, like I mentioned PW fuel regulator and W460 2.4L Surge tank(does that help)? I had putrid traction at WSID, therefore the figures. Best run 12.6@118.23 with traction ON!!. Slow out the box and traction control holding me back.
I'm looking on the net for 275/40/17 MT E/T Radials, Seems hard , my have to buy them new, then post some real times!