Karen's Miata getting Dyno'ed at Larry Chen's DynoDay at HPS, 15412 E. Valley Blvd., Industry, CA 91746 http://www.hiprospeed.com
... in order to find the best SuperTrapp disc array for HP & Torque. Lots of people were surprised that the SuperTrapp actually did what it's suppose to, ie. add back power to an open exhaust.
Engines need about 3 to 6 lbs of backpressure. That's provided in most cars by the CAT and Muffler. Charlene only has a high flo CAT ... so the added back pressure, provided by the SuperTrapp discs added three lbs of torque over the open exhaust. A welcomed addition to a Auto Crossing Miata with less then 120 hp!