You run HP or EP depending on the motor. Production is a whole different ball of wax than IT/SSB/SM. It inbolves MAJOR component development on all parts of the car. The good guys have done major motor work and are suspinsion engineers, redesging the car to optimize it, even for specific races. (I know most of the Production guys who want to win have a whole new car for the RunOffs..
Region: Rocky Mountain
Car #: 81
Year : 1995 Posts: 696
Production comes in 2 flavors: full prep and limited prep. 1.6 runs in E with full prep and F with limited prep; 1.8 runs in E with limited prep. This is a gross overgeneralization, but mechanically limited prep for miatas is IT motor and stock suspension pickup points, fuel cell and slicks. Full prep is fabricated subframes and suspensions, full tilt motors and $$$$$$$$$$$. Erik Skirmants used to have Bob Boig's old car, then it went to Jim Daniels-either one of them can comment. Jim also had a limited prep Fcar built that is now owned by Weber Manning that's a state of the art car- same bodywork as the E car, but not nearly as mechanically complicated and therefore not as expensive as E.
Ground up EP Runoffs winner, 125k
Ground up FP Runoffs winner, 60-90k
Older cars with hope 35-70k
FYI, one motor is 25k, rebuild every 4 events for 4k.
Trans is 20k, rebuild every 6 events for 2k.
EP cost a bit more than a World Challenge car to build less the travel expense and full crew (same motor as the protege in my car).
You CAN race for less but not with the best equipment.
EP is GT-3 less a full tube frame (well that is what we say). FP in a Miata is limited but FP with a Midget is not costing 70-90k for a top car.