SCCA Time Trials

TUNER CATEGORY

CLICK HERE FOR TEXT VERSION OF TUNER CATEGORY RULES

These are the vehicle classing and preparation rules for the Tuner Category of SCCA National Time Trials Competition. The intent of Tuner Category is that these are absolutely streetable, and may even be daily-driven cars. We do not guarantee the competitiveness of every car, as it would be nearly impossible and certainly overly complicated. Once you find your car, make sure it fits in Tuner Category by scrolling down to see what modifications you're allowed to do.

Tuner Category Classing

The intent of Tuner Category classing is that the category is made up of cars that could be daily-driven, or have been a recent daily driver turned track car. Like any other category, we do not guarantee the competitiveness of every car because of the complication that would involve.

As with Sport Category, we have tried to base the "cars to have" for each class on the most popular cars participating in Track Events and regional autocross events, but this time we focused on cars that are 8–20 years old. These are the cars that might have found a comfortable motorsports niche, or have proven track-worthy well into their life cycle. As we did with Sport Category, there will be a "Balance of Popularity."

If you do not see your car listed, it has not been classed. If you would like to have your car evaluated for classing, use the CONTACT page to fill out a classing request form.

New car makes, types, and models will be classified by the Time Trials Board (TTB) as soon as sufficient information is available to do so. The TTB may reclassify a car at any time up to and including December of the calendar year following that of the initial classification, without the approval of the Board of Directors. “Initial classification” includes the addition of a new listing on an exclusion list.

Tuner Category Authorized Modifications

These are the Authorized Modifications for Tuner Category vehicles (i.e., what you can do to your car and have it stay in Tuner Category). Tuner Category, along with Sport and Max, are restricted rulesets. If a modification is not specifically authorized in these Rules, it is not allowed. (If it doesn't say you can, you can’t.)

The first section outlines the Tuner Category philosophy, safety minimums, vehicle eligibility and general modification rules. Following that, the individual sections outline what you can do with each system. (e.g., body, engine, suspension, etc.)

Each set of allowances is broken down into two parts, the first of which are the "Layman's Terms." These are a basic way to describe the intent and allowance. For the rules nerds in our midst, or those who think their modification might be close to OK but not quite sure, there will be a link to the full text rules which fully explains what is allowed.

In Tuner Category, a vehicle may have every modification allowed in Sport Category, plus the modifications listed here.