I`ve been using a Sunpro for years and compared it to a high dollar model that Jason Pettis uses in his dyno room and it was 1 deg. off. Since it`s my tuning aid my #`s are all that matters and I don`t loan it to anyone ever.....just like my tire guage.

72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....