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BoP Lab / Buttonwillow Raceway Park

STL at Buttonwillow Raceway Park

Track map: sectors and speed trap

Track map with timing sectors and speed trap
Shown for: Cal Club 2026 (practice, qualifying, race) · Cal Club 2025 (practice, qualifying, race)
Class · click a class to switch, + to compare alongside
Events
PosCarDriverClass#Best lapBest theoretical lapBest qual lapBest race lapBest trap speedBest S1Best S2Best S3
1Mazda MX-5Jared KorthSTL271:51.665 B-P1:51.6451:58.002 A-R2134.8 A-R1, A-R230.616 B-P32.218 B-P48.811 B-P
2Mazda MiataWesley MollnoSTL11, 1111:52.983 B-P1:52.9831:59.582 A-Q11:59.163 A-R1133.4 A-Q130.838 B-P33.020 B-P49.197 B-P
3Mazda MiataJon DaviesSTL671:53.071 B-P1:53.0711:59.281 B-Q11:59.121 B-R1127.3 B-P30.815 B-P32.820 B-P49.536 B-P
4Mazda RX-8David LeCrenSTL21:53.515 B-P1:53.2532:09.464 A-Q22:11.372 A-R2121.0 A-Q231.217 B-P32.486 B-P49.550 B-P
5Mazda MiataSayo HaraishiSTL341:54.120 B-P1:54.0192:08.265 B-Q12:09.190 B-R1105.6 B-P31.129 B-P33.359 B-P49.531 B-P
6Mazda MX-5Ricardo ArrudaSTL161:54.343 B-P1:54.3432:00.717 B-Q22:01.410 B-R1104.3 B-P31.248 B-P32.888 B-P50.207 B-P
7Mazda MX-5Gavin WardleSTL1691:54.845 A-R1sector data unreliable1:58.292 A-Q21:54.845 A-R1132.7 A-R28.26433.98451.822
8Mazda MiataNick LeveroneSTL137, 371:54.963 B-Q21:54.8911:54.963 B-Q21:55.682 B-R1106.0 B-Q131.458 B-Q232.979 B-Q250.454 B-Q2
9Honda Civic SiJonathan LugodSTL611:56.438 B-R11:56.1281:57.331 B-Q21:56.438 B-R1106.8 B-P31.787 B-P33.468 B-P50.873 B-P
10Honda PreludeCarl YoungSTL231:56.961 B-R11:56.6311:57.917 B-Q21:56.961 B-R1104.5 B-Q231.994 B-R133.745 B-R150.892 B-R1
11Mazda MX-5Ryan GutileSTL1161:57.404 B-Q11:57.0041:57.404 B-Q11:57.483 B-R1128.4 A-Q231.829 B-R133.695 B-Q151.480 B-R1
12Mazda MiataAmy MillsSTL1141:57.757 A-Q21:57.4941:57.757 A-Q21:58.239 B-R2122.6 A-R232.321 B-Q233.780 A-Q251.393 A-Q2
13Mazda MX-5Bryce JohnsonSTL15, 131:58.716 A-Q21:58.4191:58.716 A-Q21:59.496 A-R2136.6 A-Q132.248 A-Q134.104 A-Q252.067 A-Q2
14Mazda MiataPatrick DrinkwineSTL1511:59.239 B-Q11:58.7541:59.239 B-Q12:00.132 B-R1106.6 B-P32.503 B-P34.167 B-P52.084 B-P
15Mazda MX-5 (2015)Adrian ComstockSTL252:00.239 A-Q22:00.0152:00.239 A-Q22:00.722 A-R1133.0 A-R232.847 A-R234.493 A-Q252.675 A-Q2
16Mazda MX-5Andy ChittumSTL992:00.296 A-Q21:59.6842:00.296 A-Q22:00.787 A-R1132.9 A-R232.848 A-Q134.467 A-Q252.369 A-Q2
17Mazda MiataRichard JamesSTL912:02.318 B-R12:01.7862:02.441 A-Q12:02.318 B-R1126.7 A-R132.990 B-R135.132 A-Q153.664 B-R1
18Mazda MiataTodd LaunchbaughSTL732:02.759 B-R12:02.6242:02.759 B-R198.5 B-R133.210 B-R135.059 B-R154.355 B-R1
19Mazda MiataAyden VaillancourSTL882:03.022 B-R12:02.3012:03.653 B-Q22:03.022 B-R1100.4 B-P33.072 B-P35.168 B-P54.061 B-R1
20Mazda MiataLauren Lewis >115%STL452:17.307 A-R1>2:16.162>2:17.307 A-R1>108.6 A-R1>36.821 A-R1>39.026 A-R1>1:00.315 A-R2>
21Acura integraJack McEachern >115%STL212:24.310 B-Q2>2:22.511>2:24.310 B-Q2>2:24.550 B-R2>77.6 B-Q1>38.960 B-Q1>41.141 B-Q2>1:02.410 B-R2>

One row per driver and car (a driver who changed cars has a row for each). Each cell is that driver's best in that car across the selected events, with the session it was set in; the fastest in each column is purple, and a car whose best lap is more than 115% of the fastest in its class is greyed, marked ">" (with ">115%" beside the driver) and left out of the colour scale. Click a column to sort, a row to highlight it. Theoretical lap is the sum of the best sectors, whichever laps they came from, and never slower than the best lap (where a car's fastest laps were recorded without sector times, its best lap is used). The 115% mark is about the car's best lap only: a car whose best lap is within 115% of the fastest in its class is never marked. Greyed sectors with no theoretical lap mean the sector times on file do not add up to a believable lap. Letters refer to the events above; Q is qualifying, R a race.

Sectors

Sectors are numbered in lap order from start/finish, whatever each event's timing called them; the loop names are SCCA timing's.

By car

CarClassDriversBest lapBest qualBest raceBest trapBest S1Best S2Best S3
Mazda MX-5STL71:51.665Jared Korth1:57.404Ryan Gutile1:54.845Gavin Wardle136.6Bryce Johnson8.264Gavin Wardle32.218Jared Korth48.811Jared Korth
Mazda MiataSTL101:52.983Wesley Mollno1:54.963Nick Leverone1:55.682Nick Leverone133.4Wesley Mollno30.815Jon Davies32.820Jon Davies49.197Wesley Mollno
Mazda RX-8STL11:53.515David LeCren2:09.464David LeCren2:11.372David LeCren121.0David LeCren31.217David LeCren32.486David LeCren49.550David LeCren
Honda Civic SiSTL11:56.438Jonathan Lugod1:57.331Jonathan Lugod1:56.438Jonathan Lugod106.8Jonathan Lugod31.787Jonathan Lugod33.468Jonathan Lugod50.873Jonathan Lugod
Honda PreludeSTL11:56.961Carl Young1:57.917Carl Young1:56.961Carl Young104.5Carl Young31.994Carl Young33.745Carl Young50.892Carl Young
Acura integraSTL12:24.310Jack McEachern2:24.310Jack McEachern2:24.550Jack McEachern77.6Jack McEachern38.960Jack McEachern41.141Jack McEachern1:02.410Jack McEachern

The best any driver of each car managed across the selected events, with who set it. Spellings and model years of the same car are grouped; click a row marked ▸ to see each version. Grouping is worked out from the names, so tell us if two cars are wrongly merged or split.

Rule changes between these events

Cal Club 2025 → Cal Club 2026 2025-02-22 to 2026-02-21

STL E&O: SMX Allowance in STL

#37945 from Greg Amy · Rule change · TB 25-05 (2025-05 Fastrack)

In STL Spec Lines, Table B, Mazda Spec MX5 Challenge, change as follows:
Minimum Weight: "2500 See 9.1.7.1."
Notes: "Mazda MX5 Challenge car must utilize the following components: Roush CNC cylinder head 0000-01-5300,Mahle
standard or +0.005 0000-01-5310, OEM camshaft, 11:1 compression ratio, header 0000-06-5407-NC, exhaust 0000-06-5427-NC,
cold air intake 0000- 06-5150-KT, ECU flash 0000-01-5379, Pagid front brake pads 0000-03-5104-SP or endurance pads 0000-03-
5104-EN, Pagid rear brake pads 0000-03-5114-SP or endurance pads 0000-03-5114-EN, Penske front shock 0000-04-5291-SA,
Penske rear shock 0000-04-5292-SA, Penske rear mount kit 0000-04-5358, Front mount kit 0000-04-5359, Front offset bushing
0000-04-5407-NC, Eibach front springs 0000-04-9700-08, Eibach rear springs 0000-04-9400-07, Eibach helper springs 0000-04-

Show 5 more lines

9926, Eibach front sway bar 0000-04-5306-FT, Eibach rear sway bar 0000-04-5306-RR, Interior finish panels 0000-07-5822, C&R
radiator/oil cooler assembly 0000-01-5504-CR, Oil cooler adapter and lines 0000-01-5511-KT, ACT clutch 0000-02-5004-G6,
wheels 17x8 #0000-04-5706-GM, # 0000- 04-5706-SL, and Toyo RR 235-40-17 dry, Toyo RA1 235-40-17 wet. Alternative tires on
17x7 wheels per STL rules. No other Super Touring modifications or allowances permitted except as noted in this spec line. Must
conform completely to GCR 9.1.7.1, except alternative tires (only) per STL regs allowed."

STL Lotus Weight Reduction

#38772 from Club Racing Board · Rule change · TB 25-08 (2025-08 Fastrack)

In 9.1.2. GT2/ST Spec Lines, Lotus Evora GT4, change Weight as follows:
"2750 2700"
In STU Table B: Alternate Vehicle and Engine Allowances, change Weight as follows:
Lotus Elise Cup R: "2300 2250"
Lotus Elise SC/ Lotus Exige SC: "2300 2550
2500 2450"

STL Weight adjustment for STL

#39579 from Super Touring Committee · Rule change · TB 26-01 (2026-01 Fastrack)

In GCR, Section 9.1.4.2.H.1. change Minimum Weight on chart as follows:

A specification table follows in the original; it is not shown here.

What the rules allowed changed as listed; this does not say what any particular car ran.