just put the hi-4e in my 98 dyna,cv carb. i have a mild cam[v-thunder 3020] with se heads. default setting was 5 on advance curve.bumped it up to 6 and it really came alive from 70 mph to 110,but pinged at lower rpms. so i put it back to 5 but still had some pinging.i backed off on initial timing 2 1/2 deg. in the nose cone and pinging seems to be gone,but performance wise, it feels the same as with the stock oem module. anyone experiment with the settings on your hi-4? what settings did you wind up with? can't tell any difference at idle with the multi spark on or off. i'm still running w/ S.E. dual fire ignition coil. i've heard it quite a few times to upgrade to adjustable ignition . has anyone noticed a difference with the hi-4?