and numerous Porsches of all types, 914-911/944's etc. along with f-body's, C-5's...the list goes on, on the Nashville superspeedways roadcourse just last week and I was able to stay on there bumpers or pass them in the esses. An NA's torque is good. Maybe you've got some detonating with the heat.....funny thing, there were absolutley no Supras out there---Lane/Nashville