BoP Lab / Michelin Raceway Road Atlanta

HP at Michelin Raceway Road Atlanta

Pos	Car	Driver	Class	#	Lap	Theoretical	Qual	Race	5-lap stint	Consistency	Trap	S1	S2	S3
1	Triumph Spitfire	Steve Sargis	HP	18	1:40.458 B-R2	1:40.450	1:42.361 B-Q2	1:40.458 B-R2	1:41.487 B-R2	+2.471 B-R2	114.0 A-Q1	38.378 B-R2	36.392 B-R2	25.680 B-R2
2	Volkswagen Rabbit GTI	Chuck Mathis	HP	54	1:40.736 B-R2	1:40.180	1:42.638 B-Q2	1:40.736 B-R2	1:41.437 B-R2	+1.205 B-R2	111.5 B-R2	38.157 B-R2	36.359 B-R2	25.664 B-R2
3	Mazda 2	Jesse Prather	HP	34	1:41.089 B-R2	1:40.749	1:42.396 B-Q2	1:41.089 B-R2	1:41.496 B-R2	+0.449 B-R2	111.7 B-R2	38.282 B-R2	36.852 B-R2	25.615 B-R2
4	Volkswagen Golf GTI	Chris W Albin	HP	3	1:41.915 B-R2	1:41.704	1:44.289 B-Q1	1:41.915 B-R2	1:42.811 B-R2	+2.094 B-R2	110.6 B-R2	38.818 B-R1	36.879 B-R2	26.007 B-R2
5	Fiat X 1/9	Matt Brannon	HP	22	1:42.959 A-Q1	1:42.572	1:42.959 A-Q1	1:43.467 B-R2	1:43.968 B-R2	+0.729 B-R2	113.9 A-R2	38.963 B-R2	37.177 A-Q1	26.432 A-Q1
6	Fiat X 1/9	Brayden Connolly	HP	12	1:44.931 B-R2	1:44.468	1:45.850 A-Q1	1:44.931 B-R2	1:46.011 B-R2	+6.957 B-R2	114.0 A-R1	39.767 B-R2	37.930 A-R1	26.771 B-R2
7	Mini Cooper	Leanna Wright	HP	05	1:47.417 B-R1	1:46.075	1:49.656 B-Q2	1:47.417 B-R1	1:48.121 B-R1	+1.533 B-R1	104.6 B-R2	40.647 B-R2	38.149 B-R2	27.279 B-R2
8	Honda CRX	Vesa Silegren	HP	60	1:47.771 B-P	1:47.609	1:49.672 B-Q1				103.6 B-Q1	41.809 B-P	38.485 B-P	27.315 B-P
9	Mini Cooper	Frank Schwartz	HP	27, 24	1:48.053 B-R2	1:47.858	1:48.801 B-Q2	1:48.053 B-R2	1:48.990 B-R2	+1.229 B-R2	101.3 A-R2	40.188 B-R1	39.876 B-R2	27.794 B-Q1
10	Triumph Spitfire	Andrew Wright	HP	07	1:48.353 B-R1	1:47.350	1:50.146 B-Q2	1:48.353 B-R1	1:49.181 B-R2	+0.751 B-R2	104.4 B-R2	40.673 B-R1	38.672 B-R2	28.005 B-R2
11	Honda CRX	Robert E "Horrell, Jr"	HP	91	1:52.110 B-R2	1:51.205	1:54.322 B-Q2	1:52.110 B-R2	1:54.286 B-R2	+2.529 B-R2	109.7 A-Q1	43.033 B-R2	39.392 B-R2	28.780 B-R2
12	Fiat X 1/9	Russ McBride	HP	14	1:52.176 B-Q1	1:52.006	1:52.176 B-Q1	1:53.800 B-R1	1:55.226 B-R1	+3.429 B-R1	99.7 B-Q1	42.953 B-Q1	40.493 B-Q1	28.560 B-Q1
13	Mini Cooper	Brayton Williams	HP	6	1:52.339 A-R1	1:52.037	1:58.074 A-Q2	1:52.339 A-R1	1:53.439 A-R1	+3.412 A-R1	98.1 A-R2	41.947 A-R1	41.375 A-R1	28.715 A-R1
14	Honda Civic	John Fine	HP	69	1:53.731 B-P	1:53.394					105.0 B-P	44.161 B-P	40.260 B-P	28.973 B-P
15	Fiat X 1/9	Larry Svaton >115%	HP	00	2:03.945 B-Q1	2:03.331	2:03.945 B-Q1				95.1 B-Q1	47.458 B-Q1	43.917 B-Q1	31.956 B-Q1

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. Best 5-lap stint is the mean of the driver's quickest five consecutive race laps, and consistency is how far their median race lap sat behind their best in that race (small is a driver who does it every lap); both come from the race with the best stint. 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 ">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

S1 SF → IM1
S2 IM1 → IM2
S3 IM2 → SF
SPd IM2 → IM3 0.02 mi

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

Car	Class	Drivers	Lap	Qual	Race	Trap	S1	S2	S3
Triumph Spitfire	HP	2	1:40.458Steve Sargis	1:42.361Steve Sargis	1:40.458Steve Sargis	114.0Steve Sargis	38.378Steve Sargis	36.392Steve Sargis	25.680Steve Sargis
Volkswagen Golf GTI	HP	2	1:40.736Chuck Mathis	1:42.638Chuck Mathis	1:40.736Chuck Mathis	111.5Chuck Mathis	38.157Chuck Mathis	36.359Chuck Mathis	25.664Chuck Mathis
Volkswagen Rabbit GTI	HP	1	1:40.736Chuck Mathis	1:42.638Chuck Mathis	1:40.736Chuck Mathis	111.5Chuck Mathis	38.157Chuck Mathis	36.359Chuck Mathis	25.664Chuck Mathis
Volkswagen Golf GTI	HP	1	1:41.915Chris W Albin	1:44.289Chris W Albin	1:41.915Chris W Albin	110.6Chris W Albin	38.818Chris W Albin	36.879Chris W Albin	26.007Chris W Albin
Mazda 2	HP	1	1:41.089Jesse Prather	1:42.396Jesse Prather	1:41.089Jesse Prather	111.7Jesse Prather	38.282Jesse Prather	36.852Jesse Prather	25.615Jesse Prather
Fiat X 1/9	HP	4	1:42.959Matt Brannon	1:42.959Matt Brannon	1:43.467Matt Brannon	114.0Brayden Connolly	38.963Matt Brannon	37.177Matt Brannon	26.432Matt Brannon
Mini Cooper	HP	3	1:47.417Leanna Wright	1:48.801Frank Schwartz	1:47.417Leanna Wright	104.6Leanna Wright	40.188Frank Schwartz	38.149Leanna Wright	27.279Leanna Wright
Honda CRX	HP	2	1:47.771Vesa Silegren	1:49.672Vesa Silegren	1:52.110Robert E "Horrell, Jr"	109.7Robert E "Horrell, Jr"	41.809Vesa Silegren	38.485Vesa Silegren	27.315Vesa Silegren
Honda Civic	HP	1	1:53.731John Fine			105.0John Fine	44.161John Fine	40.260John Fine	28.973John Fine

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

Atlanta Region SCCA Hoosier Super Tour @ Michelin Raceway Road Atlanta → Atlanta Region SCCA Hoosier Super Tour @ Michelin Raceway Road Atlanta 2025-03-07 to 2026-03-06

2025-04-01 HP Request for Classification of Chevrolet Spark

#37755 from Kristian Smith · Rule change · TB 25-04 (2025-04 Fastrack)

neutralChevrolet Spark 16-22 classified HP Pre at 1850 lbs minimum weight, fuel injected, 1399 cc.

In HP Spec Lines, classify the Chevrolet Spark (16-22):

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

2025-04-01 HP Request to Lower Ford Festiva Minimum Weight to 1600 LBS

#37939 from Doug DeRonne · Rule change · TB 25-04 (2025-04 Fastrack)

fasterHP Ford Festiva 88-93 minimum weight drops to 1600 lbs, variants to 1640 and 1680 lbs; compression ratio raised to 11.0:1.

In HP Spec Lines "Ford Festiva (88-93)" change as follows:
Weight:
"~~1700~~ 1600
*~~1743~~ 1640
**~~1785~~ 1680"
Notes:
"Compression ratio limited to ~~10.5~~ 11.0:1. Valve lift limited to .450”."

2025-06-01 HP Base Weight Adjustment for H-Production X1/9 Spec Lines

#38255 from Matthew Brannon · Rule change · TB 25-06 (2025-06 Fastrack)

fasterHP Fiat X-1/9 base weights reduced 50–53 lbs across 1300 and 1500 spec lines.

In HP Spec Lines, change Weight as follows:
Fiat X-1/9 & Bertone1500: “~~1790~~ 1740 *~~1835~~ 1784 **~~1880~~ 1827”
Fiat X-1/9 1300: “~~1650~~ 1600 *~~1691~~ 1640 **~~1733~~ 1680”
Fiat X-1/9 1300: “~~2060~~ 2010”
Fiat X-1/9 1500: “~~1950~~ 1900”

2025-07-01 HP BMW Z4 update

#38490 from Bryce McGuire · Rule change · TB 25-07 (2025-07 Fastrack)

slowerEP BMW Z4 03-05 restricted to 52mm flat plate intake restrictor.

In EP Spec Lines, BMW Z4 (03-05), add to Notes the following:
“52mm Flat Plate Intake Restrictor.”

2025-07-01 HP EP Fiat 124 Spider Competition Adjustment Request

#38498 from John Baucom · Rule change · TB 25-07 (2025-07 Fastrack)

fasterEP Fiat 124 Spider 1600 & 2000 weight drops 50 lbs to 2000; carburetors gain 2mm chokes to 36mm.

In EP Spec Lines, Fiat 124 Sport Spider 1600 & 124 Spider 2000, change as follows:
Weight: "~~2050~~ 2000"
Carburetor No. & Type: "(2) Weber 40 IDF-40IFI, (2) Solex C40P116, 34 36mm choke(s) req’d, (2) Weber 45DCOE w/ 34 36 mm
choke(s) on I.R. manifold or fuel injection."

2025-10-01 HP HP Plymouth Arrow spec omission

#38995 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)

neutralHP Plymouth Arrow transmission max speeds clarified to 4 or 5.

In HP Spec Lines, Plymouth Arrow (76-80), add the following wording to Trans. Speeds(max):
"4 or 5"

2025-10-01 HP Add Wheel Diameter to Appendix G

#39008 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)

neutralEP, FP, HP wheel diameter added to Appendix G as absolute maximum specification.

In Appendix G.2.3, change as follows:
"Rim width and diameter are is absolute maximums."

2025-10-01 HP Add TB ID tolerance to general Prod rules

#39009 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)

neutralEP, FP, HP throttle body inside dimensions must remain stock with +/-.25mm tolerance; butterfly dimensions stock in FP, HP only.

In GCR, Section 9.1.5.E., change as follows:
9.1.5.E.1.b.4: "The inside dimensions of the throttle body casting/housing (as measured at the throttle butterfly) must remain
stock (tolerance of +/-.25mm), but the throttle body can otherwise be ported and polished."
9.1.5.E.2.b.4: "The inside dimensions of the throttle body casting/housing and all dimensions of the throttle butterfly must
remain stock (tolerance of +/-.25mm)."

2025-11-01 HP Please Lower Weight of 280Z

#38871 from Matthew Miller · Rule change · TB 25-09 (2025-09 Fastrack)

fasterEP Nissan 280Z minimum weight reduced from 2560 to 2400 lbs.

In EP Spec Lines, Nissan 280Z, change Weight (lbs) as follows:
"(Effective 11/1/2025) ~~2560~~ 2400
*~~2624~~ 2460
**~~2688~~ 2520"

2025-11-01 HP Miata Weight Adjustment Follow Up

#38949 from Don Tucker · Rule change · TB 25-10 (2025-10 Fastrack)

fasterEP Mazda MX-5 1.8L 90-97 weight reduced to 2125 lbs from 2150 lbs.

In EP Spec Lines, Mazda MX-5 / Miata 1.8L (90-97), Effective 11/1/2025 make the following weight change:
"~~2150~~ 2125"

2025-11-01 HP Weight Break for 1098 Midget / Sprite

#38970 from Kendall Jones · Rule change · TB 25-10 (2025-10 Fastrack)

fasterHP Austin-Healey Sprite/Midget 1098cc minimum weight drops 80 lbs to 1550.

In HP Spec Lines, Austin-Healey Sprite/Midget 1098cc, Effective 11/1/2025make the following weight change:
"~~1630~~ 1550"

2025-11-01 HP HP Volvo 142 spec omission

#38994 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)

slowerHP Volvo 142/142E gains compression ratio limit 12.0:1 and valve lift limit .425".

In HP Spec Lines, Volvo 142/142E P-1800 Engine, Effective 11/1/2025 add the following wording to Notes:
"Comp. Ratio limited to 12.0:1. Valve lift limited to .425”."

2025-11-01 HP HP Mini DOHC 1.6

#38996 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)

slowerHP Mini Cooper 07-15 valve lift reduced to .390", from .450".

In HP Spec Lines, Mini Cooper (07-13) (includes 09-15 convertible and 12-15 Coupe), Effective 11/1/2025 make the following
changes to the Notes:
"Compression ratio limited to 11.0:1, Valve lift limited to ~~.450”~~.390"."

2025-11-01 HP Add to Rabbit description

#39019 from Production Committee · Rule change · TB 25-11 (2025-11 Fastrack)

neutralFP and HP Volkswagen Rabbit descriptions updated: Convertible changed to Cabriolet in FP; Cabriolet added to three HP engine variants.

In FP Spec Lines, make the following spec line correction:
"Volkswagen Rabbit (Includes ~~Convertible~~ Cabriolet)"
In HP Spec Lines, make the following spec line correction:
"Volkswagen Rabbit 1588 (Includes Cabriolet)"
"Volkswagen Rabbit 1715 (Includes Cabriolet)"
"Volkswagen Rabbit 1780 (Includes Cabriolet)"

2025-11-01 HP Clean-up 9.1.5.E.7e

#39025 from Production Committee · Rule change · TB 25-11 (2025-11 Fastrack)

neutralEP, FP, HP: rear drum brake to disc conversion clarified; rotors solid, diameter limited to largest front rotor permitted.

In GCR, Section 9.1.5.E.7., change as follows:
"e. Cars fitted with rear drum brakes, can convert to rear disc brakes without penalty. N~~ote that the “Brakes Std.” and “Brakes~~
~~Alt.” listings on a vehicle’s spec line do not prohibit a car that was fitted with rear drum brakes stock, from converting to rear~~
~~disc brakes under this rule~~. When converting from rear drum brakes to rear disc brakes:
1. Rear brake rotors must be solid and can be no larger in diameter than the largest permitted front brake rotor, as defined on
the vehicle’s spec line.
2. Rear calipers and mounting brackets are unrestricted but must be made of a ferrous or aluminum material. ~~The standard and~~
~~alternate brake listings on a vehicle’s specification line, does not prohibit a car that was fitted with rear drum brakes as stock~~

Show 3 more lines

~~from converting to rear disc brakes under this rule.~~
3. The “Brakes Std.” and “Brakes Alt.” listings on a vehicle’s spec line do not prohibit a car that was fitted with rear drum brakes
as stock from converting to rear disc brakes under this rule."

2025-11-01 HP Add TB size to Ford Mustang (94-98) Spec Line

#39130 from Production Committee · Rule change · TB 25-11 (2025-11 Fastrack)

neutralEP Ford Mustang (94-98) fuel injected throttle body inside diameter specified at 60.

In EP Spec Lines, Ford Mustang (94-98) add the following to the Fuel Injected Equipped Throttle Body Inside Diameter column:
"60"

2025-12-01 HP Request to Re-Classsify Datsun SPL-311 to HP from FP

#39116 from Robert Heatwole · Rule change · TB 25-12 (2025-12 Fastrack)

neutralDatsun SPL-311 newly classified to HP at 2050 lbs with 1595cc OHV iron engine and specified carburetors.

In HP Spec Lines, classify Nissan/Datsun SPL 311 as follows:

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

2025-12-01 HP TR2 Notes E&O

#39180 from Anthony Parker · Rule change · TB 25-12 (2025-12 Fastrack)

unclearEP Triumph TR2-TR4A allows 5-speed gearbox without overdrive; removes Weber carb and weight specification.

In EP Spec Lines, Triumph TR2, 3, 3A, 4, 4A, TR4, TR4A, IRS, make the following change to the Notes:
"Front apron assembly may be made of alternate material. ~~Three (3) Weber 40 DCOE on IR manifold with 28mm chokes @ 1990~~
~~lbs.~~ Laycock overdrive, may use 5 speed gearbox without overdrive."

2025-12-01 HP Balance of Power

#39187 from Jim Simaras · Rule change · TB 25-12 (2025-12 Fastrack)

slowerEP BMW Z3 2.5L restrictor reduced 52mm to 50mm, weight increased to 2550 lbs base; five other BMW models get smaller restrictors.

In EP Spec Lines, make the following changes to Restrictors:
BMW Z3 2.5L: "~~52mm~~ 50mm Flat Plate Intake Restrictor"
BMW Z3 2.8L (97-00): "~~55mm~~ 53mm Flat Plate Intake Restrictor"
BMW 328i/is E36 (96-99): "~~58mm~~ 55mm Flat Plate Intake Restrictor"
BMW 328i/ci E46 (01-06): "~~58mm~~ 55mm Flat Plate Intake Restrictor"
BMW 325i/is (E46) (01-06): "~~56mm~~ 53mm Flat Plate Intake Restrictor"
BMW 325is M-Technic (1994): "~~56mm~~ 53mm Flat Plate Intake Restrictor"
BMW 325i/is E-36 (92-95): "~~56mm~~ 53mm Flat Plate Intake Restrictor"

Show 4 more lines

In EP Spec Lines, BMW Z3 2.5L, change Weight as follows:
"~~2500~~ 2550
*~~2563~~ 2614
**~~2625~~ 2678"

2025-12-01 HP Alternative BOP Request for 84-87 Honda CRX/Civic

#39223 from Bill Lamkin · Rule change · TB 25-12 (2025-12 Fastrack)

fasterHP Honda Civic and CRX models get wider 13-inch wheels: 6 to 7 inches.

In HP Spec Lines, change Wheels as follows:
Honda Civic: "13 x 6 7"
Honda Civic DX (92-95): "13 x 6 7"
Honda Civic/Si (84-87): "13 x 6 7"
Honda Civic 1.5 (88-91): "13 x 6 7"
Honda CRX/Si (84-87): "13 x 6 7"
Honda CRX 1.5(88-91): "13 x 67"

2026-01-01 HP E/O: Improve Consistency of the Spec Lines

#39500 from Robert Bax · Rule change · TB 26-01 (2026-01 Fastrack)

unclearHP Toyota MR-2 1.6L (85-89) compression ratio set to 11.0:1.

In HP Spec Line, Toyota MR-2 1.6L (85-89), change Comp. Ratio as follows:
"11.0:1"

2026-01-01 HP Request to Reclassify BMW 2002 Into H Production

#39567 from Jonathan Kinberg · Rule change · TB 26-01 (2026-01 Fastrack)

neutralBMW 2002 newly classified to H Production at 2350 lbs with 1990cc iron block, 40 DCNF carburetor, 11.0:1 compression.

In HP Spec Lines, classify BMW 2002, as follows:

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

2026-02-01 HP Triumph Spitfire 1296cc Compression Ratio Increase to 12:1

#39589 from Neil Verity · Rule change · TB 26-02 (2026-02 Fastrack)

fasterHP Triumph Spitfire 1296cc compression ratio increases from 11.0 to 12.0:1.

In HP Spec Lines, make the following spec line changes:
Triumph Spitfire:
Carburetion
"Valves: (I) 33.0/(1.30) (E) 29.7/(1.17)
Comp. ratio ~~11.0~~ 12.0:1, Valve lift .450”
Trans. Speeds: 4"
Triumph Spitfire Mk. III & IV 1500:
Carburetion

Show 5 more lines

"1300 Valves: (I) 33.0/(1.30) (E) 29.7/(1.17)
1500 Valves: (I) 36.6/(1.44) (E) 29.7/(1.17)
1300: Comp. ratio 12.0:1, Valve lift .450”
1500: Comp. ratio 11.0:1, Valve lift .450”
Trans. Speeds: 4"

2026-03-01 HP Clarification On Oil Cooler Ducting

#39604 from Chuck Allard · Rule change · TB 26-03 (2026-03 Fastrack)

neutralHP class mid and rear engine cars may add single inlet and outlet holes for oil cooler ducting in front bodywork.

In GCR, Section 9.1.5.E.6.g.4, add the following:
"On mid and rear engine cars, a single inlet hole may be cut in the front bodywork and a single outlet hole may be cut in the front
trunk floor or a wheel well, for the sole purpose of ducting air to a single engine oil cooler. The size of these holes may be no
larger than the area of the oil cooler itself."

2026-03-01 HP Honda Fit 2015-19 Error in Engine Classification

#39853 from Jose Fabian · Rule change · TB 26-03 (2026-03 Fastrack)

neutralHP Honda Fit 2015-19 engine reclassified from SOHC to DOHC.

In HP Spec Lines, Honda Fit (15-19), change Engine Type Mat’l Block/Head as follows:
"4 Cyl. ~~SOHC~~ DOHC"

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