HP Request for Classification of Chevrolet Spark
#37755 from Kristian Smith · Rule change · TB 25-04 (2025-04 Fastrack)
In HP Spec Lines, classify the Chevrolet Spark (16-22):
A specification table follows in the original; it is not shown here.
BoP Lab / Michelin Raceway Road Atlanta
| Pos | Car | Driver | Class | # | Best lap | Best theoretical lap | Best qual lap | Best race lap | Best trap speed | Best S1 | Best S2 | Best 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 | 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 | 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 | 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 | 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 | 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 | 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 | 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 | 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 | 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 | 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 | 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 | 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; 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
- 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 | Best lap | Best qual | Best race | Best trap | Best S1 | Best S2 | Best 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
HP Request to Lower Ford Festiva Minimum Weight to 1600 LBS
#37939 from Doug DeRonne · Rule change · TB 25-04 (2025-04 Fastrack)
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”."
HP Base Weight Adjustment for H-Production X1/9 Spec Lines
#38255 from Matthew Brannon · Rule change · TB 25-06 (2025-06 Fastrack)
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”
HP BMW Z4 update
#38490 from Bryce McGuire · Rule change · TB 25-07 (2025-07 Fastrack)
In EP Spec Lines, BMW Z4 (03-05), add to Notes the following:
“52mm Flat Plate Intake Restrictor.”
HP EP Fiat 124 Spider Competition Adjustment Request
#38498 from John Baucom · Rule change · TB 25-07 (2025-07 Fastrack)
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."
HP HP Plymouth Arrow spec omission
#38995 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)
In HP Spec Lines, Plymouth Arrow (76-80), add the following wording to Trans. Speeds(max):
"4 or 5"
HP Add Wheel Diameter to Appendix G
#39008 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)
In Appendix G.2.3, change as follows:
"Rim width and diameter are is absolute maximums."
HP Add TB ID tolerance to general Prod rules
#39009 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)
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)."
HP Please Lower Weight of 280Z
#38871 from Matthew Miller · Rule change · TB 25-09 (2025-09 Fastrack)
In EP Spec Lines, Nissan 280Z, change Weight (lbs) as follows:
"(Effective 11/1/2025) 2560 2400
*2624 2460
**2688 2520"
HP Miata Weight Adjustment Follow Up
#38949 from Don Tucker · Rule change · TB 25-10 (2025-10 Fastrack)
In EP Spec Lines, Mazda MX-5 / Miata 1.8L (90-97), Effective 11/1/2025 make the following weight change:
"2150 2125"
HP Weight Break for 1098 Midget / Sprite
#38970 from Kendall Jones · Rule change · TB 25-10 (2025-10 Fastrack)
In HP Spec Lines, Austin-Healey Sprite/Midget 1098cc, Effective 11/1/2025make the following weight change:
"1630 1550"
HP HP Volvo 142 spec omission
#38994 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)
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”."
HP HP Mini DOHC 1.6
#38996 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)
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"."
HP Add to Rabbit description
#39019 from Production Committee · Rule change · TB 25-11 (2025-11 Fastrack)
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)"
HP Clean-up 9.1.5.E.7e
#39025 from Production Committee · Rule change · TB 25-11 (2025-11 Fastrack)
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. Note that the “Brakes Std.” and “BrakesAlt.” listings on a vehicle’s spec line do not prohibit a car that was fitted with rear drum brakes stock, from converting to reardisc 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 andalternate brake listings on a vehicle’s specification line, does not prohibit a car that was fitted with rear drum brakes as stock
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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."
HP Add TB size to Ford Mustang (94-98) Spec Line
#39130 from Production Committee · Rule change · TB 25-11 (2025-11 Fastrack)
In EP Spec Lines, Ford Mustang (94-98) add the following to the Fuel Injected Equipped Throttle Body Inside Diameter column:
"60"
HP Request to Re-Classsify Datsun SPL-311 to HP from FP
#39116 from Robert Heatwole · Rule change · TB 25-12 (2025-12 Fastrack)
In HP Spec Lines, classify Nissan/Datsun SPL 311 as follows:
A specification table follows in the original; it is not shown here.
HP TR2 Notes E&O
#39180 from Anthony Parker · Rule change · TB 25-12 (2025-12 Fastrack)
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 @ 1990lbs. Laycock overdrive, may use 5 speed gearbox without overdrive."
HP Balance of Power
#39187 from Jim Simaras · Rule change · TB 25-12 (2025-12 Fastrack)
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"
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In EP Spec Lines, BMW Z3 2.5L, change Weight as follows:
"2500 2550
*2563 2614
**2625 2678"
HP Alternative BOP Request for 84-87 Honda CRX/Civic
#39223 from Bill Lamkin · Rule change · TB 25-12 (2025-12 Fastrack)
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"
HP E/O: Improve Consistency of the Spec Lines
#39500 from Robert Bax · Rule change · TB 26-01 (2026-01 Fastrack)
In HP Spec Line, Toyota MR-2 1.6L (85-89), change Comp. Ratio as follows:
"11.0:1"
HP Request to Reclassify BMW 2002 Into H Production
#39567 from Jonathan Kinberg · Rule change · TB 26-01 (2026-01 Fastrack)
In HP Spec Lines, classify BMW 2002, as follows:
A specification table follows in the original; it is not shown here.
HP Triumph Spitfire 1296cc Compression Ratio Increase to 12:1
#39589 from Neil Verity · Rule change · TB 26-02 (2026-02 Fastrack)
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
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"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"
HP Clarification On Oil Cooler Ducting
#39604 from Chuck Allard · Rule change · TB 26-03 (2026-03 Fastrack)
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."
HP Honda Fit 2015-19 Error in Engine Classification
#39853 from Jose Fabian · Rule change · TB 26-03 (2026-03 Fastrack)
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.