PinnedGeneral

Complete HPDE car prep checklist from a decade of track days

CChris Tanferno · May 6, 2026New

After ten years of running HPDE events in everything from a stock Miata to a prepped E46 M3, here is the car prep checklist I run through before every single event. I have seen people get sent home from tech for things that take five minutes to fix at home. Fluids: - Brake fluid: flush with DOT 4 at minimum every season, DOT 5.1 or racing fluid if you are in Group 3+. Check the reservoir — it should be full. If it is low, your pads are worn or you have a leak. Either one needs attention. - Coolant: 50/50 mix is fine for HPDE. Some orgs ban straight water because of track contamination, so check your org rules. - Oil: full synthetic rated for your engine, at the full mark. Bring a quart to the track. - Power steering (if applicable): top off. A PS leak on track can end your day fast. Brakes: - Pad thickness: minimum 50% life remaining for a weekend. Track pads eat fast. I have gone through a full set of front pads in a single weekend at VIR. - Rotor condition: check for deep scoring, cracks, or heavy lip. Surface rust is fine — it burns off in one corner. - Brake lines: flex the rubber lines and look for cracks, bulges, swelling. Braided stainless lines are a worthwhile upgrade. Tires: - Tread depth: 4/32" minimum. You need the tread for water evacuation and the rubber depth acts as a heat sink. - Tire age: if they are over 5 years old from the DOT date code, consider replacing them regardless of tread. - Pressures: set cold pressures per your tire manufacturer spec, then adjust hot. More on this in a separate thread. Under the hood: - Battery tie-down: must be secure. Some orgs will fail you for a loose battery. - Hose clamps: squeeze-test every coolant hose. If it feels soft or swollen, replace it. - Belts: look for cracks, glazing, fraying. A serpentine belt failure on track is a bad day. Interior: - Remove all loose items. Everything. Floor mats, parking passes, sunglasses, coins. If it is not bolted down, it comes out. - Ensure pedals are not obstructed. Check that a floor mat cannot slide forward. This is not exhaustive but it covers the things I see catch people out most often. What would you add?

3 Replies

CChris Tanferno · May 6, 2026New

I would add checking your wheel bearings. Grab the tire at 12 and 6 o'clock and try to rock it — any play at all means the bearing needs attention before you take the car on track. A wheel bearing failure at speed is catastrophic. This is something most tech inspections will check, but if it fails at tech you are done for the day. Check it at home a week before so you have time to address it.

CChris Tanferno · May 6, 2026New

On the brake fluid point — I want to emphasize that DOT 3 is not adequate for track use regardless of how fresh it is. The dry boiling point is simply too low. Even in Group 1 where speeds are moderate, repeated braking cycles will heat-soak the fluid faster than you expect. I learned this the hard way at my second event when I lost pedal going into Turn 1 at Sebring. DOT 4 is the bare minimum, and if you are running more than a few weekends per season, a racing fluid like Motul RBF 600 or Castrol SRF will give you real peace of mind. The cost difference is maybe $30 and the safety margin is enormous.

CChris Tanferno · May 6, 2026New

One item I do not see on many checklists: alignment check before the season. Track driving generates forces that push your alignment out of spec faster than street driving, especially toe settings on the front. Even if you are running a stock alignment, have it verified. A toe-out condition on the front can make the car feel nervous and darty at high speed, and a lot of people attribute that to their driving when it is actually a mechanical issue. If you are serious about track driving, a front-end alignment with a bit more negative camber (-1.5 to -2.0 degrees on most street cars) will transform your tire wear pattern and give the front end noticeably more grip at turn-in.