thats what we all thought. my boost read out either on brake no 2step. or 1st 2nd 3rd gear rolls on slicks. or full bore passes never shows more than 9lbs. tial v60 gate with 9lb springs. as soon as we straped it to the dyno went staight to 15lbs and stayed rock steady! i wanted a 9lb test before i went to the extra spring for 15lbs.
he shows 15on his boost gauge and so did mine. next day took it on the street again on slicks. back to 9lbs rock steady. my extra 5 lbs spring is behind the driver seat in the truck. i was plannin on adding it for a 15lb pass. but couldent.