Dave, I don't wanna derail the thread . But as soon as u mentioned talty that brings back my grass dragging days , I raced against and with talty quit a few times. Nice guysTalty Polaris had one of those. Back in 06 I convinced him to use it on my Fuse 600 for a before after with stock timing and bumped up timing. I don't remember all the particulars but the 2 degree advance gave a near 1/2 second gain for I believe 660 ft. He bumped all his Fuse6 timings after that. Pretty popular back in the 2000's