Johnny was at the Tapout shop last summer for us to complete a Purple Belt Performance Package on his ATS-V. At that time, we noticed that power dropped off pretty hard on the top end. We’ve seen this before and it’s a telltale sign of weak valve springs. We reduced his RPM range to eliminate any unnecessary strain, and the car still made excellent power.

Fast-forward to this summer and Johnny was back to upgrade to the Mace Stage 1 camshafts and valve springs. Peak power increased by 12 whp and top end power gains were HUGE at 79 whp! Not only that, it was 102 degrees in the shop when we completed this dyno tuning.

This customer purchased a super clean 2016 ATS-V that already had Purple Belt equivalent parts installed, but because he didn’t know a lot of the history on the car, he wanted to have us check things over and give it a fresh dyno tune.

He drove all the way to Ohio from Virginia so he could get Jorge’s magic ATS-V touch! After a fresh set of spark plugs and strapping it down to the dyno, it put down a solid 602 whp on E65 fuel. While he’s no stranger to horsepower having several V8s already in his stable, this ATS-V still packs a big punch on the streets!