I had my car dynoed yesterday and unfortunately lost 28RWHP. The shop suggested that my belt was slipping by the shape of the curve. I confirmed this by driving on some empty roads. The car is only making 8lbs when it used to make 10lbs. I changed belt in the morning prior to the dyno pulls. The tune has not been changed and the only thing I can think of is the belt tensioner. Anybody got suggestions?
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