Cornpatch MO
Well-Known Member
I have a Sun Super tach from the 60-70's. For night time drag racing and the light doesn't show the needle & tach face well. I would like to rig up a little exterior light that would shine on the tach face. The light comes on at the RPM I would like to launch at. Allows me to watch the tree instead of the tach. Light stays on, while RPM is above that point. The light illuminates better, the tach face and adjustable pointer for shifting. I can rig up the light, but how to trigger it? I am thinking some kind of switch that operates off the throttle linkage, (Holley) and adjustable for setting the RPM level . Probably would need to be all mechanical? A different tach is not an option.................MO