Yellow Car Points

What it is

Yellow Car Points follows the Corvettes in the IMSA WeatherTech SportsCar Championship: where they stand in the championship, how each race went, and what's happening live during a session, with a focus on the championship fight.

It covers the Pratt Miller-built Corvettes in GTD PRO (#4, #3, #74) and GTD (#13, #36), plus Pratt Miller Motorsports' LMP2 #73. It's a Corvette fan site first; we also follow GM's GTP Cadillacs (#31, #40, #10) and AO Racing (#99 in LMP2, #77 in GTD PRO). Pick This is my car to make any car in any class "our car": the Championship and Race tabs, including the cars to watch, then work for it (without team colours or links). Pick a car with the buttons at the top of the Championship or Race page. Every card has a Hide button to fold it away; the site remembers which cards you've hidden on each device. The page takes on that car's livery colours: Corvette Racing yellow for #3 and #4, black and gold for #13, DXDT blue and green for #36, DragonSpeed's Evel Knievel white, blue and red for #74 and #81, and Pratt Miller's black and orange for the #73 LMP2, and AO Racing's purple "Spike" dragon for the #99 LMP2. The Auto / Light / Dark switch sets the theme. The site remembers your choice, and you can share a link to a specific car, like yellowcarpoints.win/#13.

It's an unofficial fan project, not affiliated with IMSA, GM, Chevrolet or Corvette Racing.

How to use it

Championship: where we are and what we must do

• The answer at the top: one line saying what the selected car needs, for example "Win the race and #4 is champion, whatever anyone else does". During the race it becomes where the title stands if the race ended now and the lowest finish the car can afford.
• Rival by rival: a plain line for each car still in the fight ("if #1 wins, #4 needs P2 or better"), with the full finish-by-finish table one click away. If the car is out of the title fight, the highest championship position it can still reach and what that would take.
• If the race ended now (race only): the projected championship table, the margin to the title rivals either side, and the title margin lap by lap.
• Championship picture: the top cars' points now, the most each can still reach with the rounds left in its class, and a clinch line: a total no rival can reach any more. In the race, where each is running and its points if it ended now.
• When the scenarios appear: early in the season the page just shows the picture and the earliest round the leader could clinch. "What #X needs" appears once it matters: when a car can clinch the title at the next round, when the selected car could be knocked out of contention there, and always at the final round.
• Last race: each Corvette's finish, grid, best lap, stops and points from the latest round; straight after the flag, the provisional result and title outcome from live timing.
• Standings, points behind the leader, and race by race (folded away; tap to open) for the background.

Race: what's happening now, for the cars we care about

For the selected car during a session (it shows the last session between events):

• Two views: Fan puts IMSA's video and the track map first, then our cars, what just happened, race control and the drivers. Strategy shows the pit wall, if we pit now, pit strategy, fuel to the flag, drivers, weather, pace analysis and the charts. Each view has its own layout (Arrange saves each one separately), the choice is remembered, and a link can pick one with ?view=fan or ?view=strategy. Both always follow your car, the car it's racing for the lead (the class leader, or the car behind when it leads), the car right ahead on track, and the car in the championship spot it can gain (or the one behind when it leads the title). In Strategy, pace analysis compares exactly those cars, plus any you add.
• Session bar: flag, time to go, a one-line title status, and where every Corvette is running (tap one to switch to it).
• Strategy board and graph (Strategy view, full width under the pit wall): the class board (every car's net position, energy, laps left, next stop, stops, pace) and a graph of the whole race: lap time against lap for your car and its rivals, with each lap as a dot and a trend line (median of the last 9 clean laps). Ahead of "now" it continues each car at its current pace to where it will be when time runs out, marks projected stops and your car's last-stop window, weather at its estimated lap, and shades how often past races here had a caution on those laps. The x-axis runs to the class's average race distance at Petit Le Mans 2018–2025 (GTP ~433 laps, LMP2 ~430, GTD PRO ~406, GTD ~399) until the race is 20 minutes old, then to the live projection. On a phone it shows the current lap to two hours ahead.
• Pit wall (race only): one strip under the session bar with the selected car's net position (where it runs once everyone has made the stops they owe), the cars just ahead and behind on net, the next stop, energy, the driver in the car and the drive time they still need, stops to the flag against those rivals, and one line on the most pressing thing right now (a drive-time minimum at risk, the cheap stop a yellow offers, fuel to the flag in the last three hours).
• If we pit now: where the car would rejoin in its class after a stop now (fuel only, or with tyres or a driver change), the cars it would come out between, and the same under a full-course yellow. What a stop costs is measured from this race's stops (in-lap plus the lap with the stop, against a normal lap) once there are a few, otherwise taken from Petit Le Mans 2021–2025 (about 75 s under green, about 40–56 s under yellow depending on class). It also says whether a yellow now would help or hurt against the cars nearby, from who is due to stop first. Rejoin is in class order only, and pits close at the start of a yellow.
• To the flag: for our cars and the cars around them, laps to go, laps left on the tank, and the stops still needed: "makes it", the window for a single last stop (and whether it's a short fill), or the number of stops left. From telemetry energy where IMSA has it; estimated (marked) from stint lengths otherwise. Yellows stretch a tank, so real windows open later.
• Watch: IMSA's own YouTube stream of the session, played by YouTube's player (switch it off with "Turn video off"; the site remembers). In the US the race itself is on Peacock and NBC, and IMSA's YouTube race stream is for viewers outside the US. When IMSA.tv lists an in-car camera for the selected car, a link to it appears here.
• Our cars: the selected car and the cars to watch: position, gap ahead and behind, last lap against its pace, laps to the next stop, and pit-lane status. Add any other car with "Add a car".
• What just happened: pit stops (time in the lane, fuel, tyres, driver change), position changes and title-rival changes for those cars, newest first. Everything is recorded by the site's scraper, so reloading the page loses nothing.
• Track map: where each car is on the track, estimated: GTD PRO and GTD cars from their speed since they crossed the line (IMSA telemetry), LMP2 cars from their last lap time. Our cars are labelled; cars in the pit lane are listed under the map.
• Pace: in the chart builder, Race trace (time gained or lost against the class's typical lap, the engineers' view of who's really quicker) and Rolling pace (median of the last 5 clean laps). Our cars has a Closing column ("catches #1 in ~9 laps"). The Pace analysis card has each stint overlaid by driver, every driver's lap-time spread, and a class pace map: each car's pace hour by hour against the class.
• Weather: the forecast for the race (National Weather Service and Open-Meteo), track and air temperature from IMSA's track weather, a timeline of when conditions change (rain, sunset, dark, cooling) with the estimated lap, flagged when it lines up with your car's next stop, rain and night shading on the lap charts, and pace against track temperature as the race goes on.
• Analysis tab: a race prediction (each car's chance to win, reach the podium and finish in each position), championship odds, and how the win chances move through the race. Before the race it's a statistical model fitted to every WeatherTech race since 2024 (form, starting position, practice pace, Bronze drivers, retirements); during the race it's redone every race hour from the live gaps, stops still owed and pace. Tested on 2025–26 races it picks the winner a bit more often than "the polesitter wins", which in endurance racing still isn't often. Also there: how many cautions past editions of this race had, the chance of one in each hour, and a heat map of which laps ran under caution, from IMSA's lap-by-lap flags.
• Race control: IMSA's official race control log: penalties, incidents under review and the decisions, pit lane open/closed and flags, with messages about our cars highlighted (or show only those). It comes from IMSA's results provider after each session and about hourly during long races, so it trails live timing; our cars' penalties and decisions also appear in "What just happened".
• Drivers: each car's line-up with ratings (Pro = Platinum/Gold, Am = Bronze), drive time so far in the race, who's in the car and for how long, and the Bronze driver's progress towards this event's minimum drive time. In the race every driver gets a bar against their minimum (the Bronze minimum where it applies), the time still needed, and the latest they can get in and still make it; the driver in the car also shows their time in the last 6 hours (approximate, from lap times between driver changes). A warning shows when the drivers still short of their minimums need more time than the race has left.
• Timing: lap-time chart for our cars, and the timing table for them and the cars around them (or the full class).
• Build a chart: plot gap to the selected car, lap time, lap time against the selected car, gap to the leader, class position, energy or laps into the stint, for our cars, the top 5, the Corvettes or the whole class, with optional smoothing. Yellow flags are shaded and pit stops marked. Add up to four charts; they're remembered on your device.
• Pit strategy: one row per car: energy left and use per lap, laps left on the tank, next stop, refuel time for the next fill, last stop (F refuel, T tyres, D driver change), stops made and still needed, and pace with its trend through the stint.
• #73 and #99 (LMP2): Pratt Miller Motorsports' #73 ORECA and AO Racing's #99 "Spike" ORECA, with the LMP2 championship on the Championship tab. LMP2 cars don't send IMSA telemetry, so their energy and track-map position are estimates from timing.
• More detail (folded away): sectors, gap and energy charts, and the strategy board for the whole class.

Saving your settings and the guest book

Save settings (top of every page) keeps your chosen car, theme, charts and hidden cards, and brings them to your other devices. It's completely anonymous: there's no name, email or password. You get a random sync code to type on another device, and can add a passkey to sign in with your phone's or computer's lock instead. The site stores only your display settings against a scrambled form of the code; you can delete everything from the same panel.

The guest book is open to everyone. Messages appear once they've been approved.

On race day

During a WeatherTech session the Race tab fills in with our cars, timing, pit strategy and pace, and in the race the Championship tab switches its answer to "if it ended now". Both refresh by themselves (live timing every 10 seconds); no need to reload.

• In the race, the headline tells you where the title stands if the race ended now, for example "#4 champion by 23 if it ends like this", and the lowest finish the car can afford.
• The site works out which rivals matter right now. If a different car becomes the closest title rival mid-race, a banner says so.
• Practice and qualifying show live timing, lap times and pace for the selected car's class. The championship maths only runs in the race.
• After the checkered flag the result is marked provisional until IMSA publishes the official points, and then the standings update by themselves.

Terms used on the site

If it finished now

Championship points as if the race ended at this moment, using IMSA's points for finishing position (350 for a class win, 320 for 2nd, 300 for 3rd…) plus qualifying points (a tenth of that).

Net order

During a round of pit stops the running order is misleading: a car that has just stopped looks a long way back. The net order moves back the cars that still owe a stop by the time a stop costs, so it shows the order once everyone has pitted. It's switched off under yellow flags.

Cars to watch

On the Race page, the cars compared with the one you picked: the class leader (or the car behind when yours leads), and in the race the closest title rival, just behind (or ahead) in the championship-if-it-finished-now. They update as the race changes, and you can add others.

A place is worth

Points gained by moving up one class position, and lost by dropping one.

Needs P5

The lowest class finish that's still enough, assuming everyone else holds position.

Energy

IMSA meters fuel as "energy" in percent. The site tracks how much each car uses per lap to estimate how far its tank will go.

Stint / pit window

A stint is the run between pit stops. The pit window is the range of laps in which a stop is due, from this race's stints or, early on, last year's race at the same track.

Trend

How lap time or gap is changing per lap over the last 10 laps. Green means quicker or closing, red slower or losing time.

Where the data comes from

• Championship points and race results: IMSA's official results published by Al Kamel Systems, IMSA's timing provider. Checked every 30 minutes.
• Live timing: the public feed behind IMSA's live scoring page, read every 10 seconds in the race and every 15 seconds in practice and qualifying.
• Energy and refuelling: IMSA's public live telemetry, the same data as imsa.com's telemetry page.
• Session times: IMSA's weekend schedule. The site only follows live timing during WeatherTech sessions.

Limitations

• Live numbers are estimates. Projections assume everyone holds position and keeps their current pace and energy use. Full-course yellows, short fills, penalties and strategy calls change them. Ties aren't modelled.
• About 10 to 20 seconds behind, so a little behind TV and IMSA's own timing.
• Unofficial feeds. If IMSA changes them, parts of the live view can stop working until the site is updated.
• Hosted on a home server, so the site can occasionally be unavailable.
• IMSA's results are the final word. If anything here disagrees with them, IMSA is right.