Turbo Street Modified (“TSM”) is a new class whose idea had been “kicked around” for years but has now come to light. Scott Simpson and Lonnie Diers got the ball rolling in November of 2001 and by Janaury 2002 the GSCA had agreed to a set of rules and to replace the old Turbo Factory Stock class with TSM.

Throughout those 3 months it was quite apparent that there was tremendous interest from both racers and vendors. Drawing from this strength, Lonnie and Scott proposed running TSM at more than one event and holding a point series. Again, interest was high and after contacting several event organizers, 4 events were selected for the first season and the TSM Point Series was born. Lonnie and Scott are the directors for the points series and one or both of them will be at most of the events.

TSM rules are pretty simple.  The car must be a factory stock appearing Turbo Regal running the stock turbo-engine block, a turbocharger no larger than 70mm and meet a minimum weight requirement. Complete rules are available by clicking here. Points are accumulated by the registered racers at any each of the events attended, yet only the best three count towards each racer's year-end points total. Cash and prizes are awarded to the winners; click here for details. Racers run on a 4-tenths Pro Tree and must run 11.50 in the quarter to qualify. The qualifying time was raised to 11.99 for the series in 2003 to allow more racers to compete.

TSM is a unique opportunity for the Turbo Regal vendors to show their support for the Turbo Regals as it allows more of the most popular upgrades to be utilized on the most common of the turbo Buick V6 engines - the stock “109” engine block. Aluminum heads are allowed. Aftermarket fuel injection /timing control is allowed. Transbrakes, the TH‑400 transmission and 9" differentials are even allowed.