P2 at Indianapolis Motor Speedway

2019-01-01 P2 Request to Allow 1345cc Hayabusa Engines for Spec Line P2 Cars

#25595 from Paul Decker · Rule change · TB 19-01 (2019-01 Fastrack)

In P2, Table 1 (Spec Line Cars), add engines as follows:
Marque
Wheelbase inches
max/ Track Max
inches
Weight
Displacement Engine Restrictor Notes

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

2019-01-01 P2 Change CN inlet restrictor implementation date

#25816 from Formula/Sports Racing Committee · Rule change · TB 19-01 (2019-01 Fastrack)

In P2 Engine Table, Line E, change the notes as follows:
“Approved engines list: MZR/Duratec, Honda K20A-FD2, Ford Zetec Pinto. For Pinto see line
E, note 2 below. Group CN non-composite chassis with stock Honda K20A-FD2 may must
use stock Honda intake manifold with 64mm single throttle body with 55mm flat plate intake
restrictor at 1500 lbs. minimum weight (restrictor implementation effective 1/1/2019 3/1/2019).”
In P2 Table 1, FIA Group CN non-composite chassis line, change the restrictor as follows:
“Stock 64mm single throttle body with 55mm flat plate restrictor (restrictor implementation
effective 1/1/2019 3/1/2019).”

2019-01-01 P2 Clarify Honda K20A-FD2 parts requirement

#25950 from Formula/Sports Racing Committee · Rule change · TB 19-01 (2019-01 Fastrack)

In P2 Engine Table, Line E, change the notes as follows:
“Approved engines list: MZR/Duratec, HondaK 20A-FD2, Ford Zetec Pinto. For Pinto see line
E, note 2 below. Group CN non-composite chassis with stock Honda K20A-FD2 may must
use stock Honda intake manifold with 64mm single throttle body with 55mm flat plate intake
restrictor at 1500 lbs. minimum weight (restrictor implementation effective 1/1/2019). No engine
modifications except for dry sump oil system, ECU mapping, and exhaust system. Must use
stock Honda OEM parts as listed in CN Honda K20A-FD2 Parts List found here: https://www.
scca.com/pages/technical-forms-and-downloads No machining allowed.”

2019-03-01 P2 Change Engine Table Lines B.1 & B.5

#25777 from Formula/Sports Racing Committee · Rule change · TB 19-01 (2019-01 Fastrack)

restrictors and min. weight
In the P2 Engine Table, effective 3/1/2019, make changes as follows:
Line B.1, stock engine:
Restrictor: 36.5mm 35.0mm
Weight: 1000 1025
Line B.1, modified engine:
Restrictor: 37.5mm 34.0mm
Weight: 1100 1125

2019-03-01 P2 Change Line A.1 restrictor size

#26429 from Formula/Sports Racing Committee · Rule change · TB 19-03 (2019-03 Fastrack)

In P2 Engine Table, Line A.1, change the restrictor as follows:
“40 38mm”

2019-06-01 P2 Request to restrict all cars

#26246 from AJ Snyder · Rule change · TB 19-04 (2019-04 Fastrack)

In GCR section 9.1.8.H.15, change the weight as follows:
“The car shall weigh 1350 1375 lbs. minimum, including the driver.”
Note from the CRB: Effective 6/1/2019, Enterprises shall reduce the peak horsepower of the
sealed ESR engine (GCR section 9.1.8.H.7.a) to the number specified by the CRB, consistent
with the practice of maintaining all competitors’ horsepower and torque numbers in confidence.
Enterprises shall supply dyno data to the CRB prior to 6/1/2019 to allow review for compliance.

2019-07-01 P2 E&O Transmissions

#27006 from Formula/Sports Racing Committee · Rule change · TB 19-07 (2019-07 Fastrack)

In P2, GCR section 9.1.8.D.J, add the following:
"7. Power shall not be applied to more than two (2) wheels."

2019-08-31 P2 Update P2 Engine Table spec lines to reflect 3/1/2019

#27254 from Formula/Sports Racing Committee · Rule change · TB 19-09 (2019-09 Fastrack)

changes
In the P2 engine table, make changes as follows:

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

2019-10-01 P2 Update Engine Table Line E notes

#27414 from Formula/Sports Racing Committee · Rule change · TB 19-10 (2019-10 Fastrack)

In the P2 Engine Table, Line E, change the notes as follows:
"Group CN non-composite chassis with stock Honda K20A-FD2 must use stock Honda intake manifold
with 64mm single throttle body with 55mm flat plate intake restrictor at 1500 lbs. minimum
weight (restrictor implementation effective 3/1/2019)."

2020-01-01 P2 Request for addition of BMW Engine in P2 Engine Table

#27821 from Keith Carter · Rule change · TB 20-01 (2020-01 Fastrack)

In P2 Engine Table, Line B.1, add the following:
"4 cycle Motorcycle-based Kawasaki, Suzuki, Yamaha, Honda, BMW"

2020-03-01 P2 Request for Fly by Wire Rule Wording Change

#28247 from Greg Bell · Rule change · TB 20-03 (2020-03 Fastrack)

In GCR section 9.1.8.D.L.g, make changes as follows:
"Electronic throttle control (ETC, Fly-by-wire, Drive-by-wire)-: Engines utilizing using stock ECUs with
Drive-By-Wire systems are permitted as long as the throttle pedal activates the original throttle shaft
activation mechanism of the production system."

2020-04-01 P2 Add ESR inlet restrictor

#27869 from Formula/Sports Racing Committee · Rule change · TB 20-01 (2020-01 Fastrack)

In P2 Table 1, Enterprise Sports Racer line, add to the notes the following:
"Effective 4/1/2020, the ESR 2.3L engine must have either an SIR or a Flat Plate restrictor fitted that
meets the peak horsepower specified by the SCCA. The SIR or Flat Plate restrictor must be sized in whole
or 0.5mm increments. Dyno data also must be submitted for restrictors 1.0 and 2.0mm on either side of
the restrictor size that permits the engine to meet the specified peak horsepower."

2020-05-01 P2 SCCA Enterprises ESR / P2 engine restrictor testing

#28669 from Mike Davies · Rule change · TB 20-05 (2019-05 Fastrack)

In GCR section 9.1.8.H.7.a, add a new part and renumber the section accordingly:
"15. 55mm flat plate intake restrictor Part # WM303013 as supplied by Enterprises"
In P2 Table 1, Enterprises Sports Racer spec line, change as follows:
"See ESR rules in GCR section 9.1.8. for complete specifications. Effective 4/1/2020, the ESR 2.3L engine
must have either an SIR or a Flat Plate restrictor fitted that meets the peak horsepower specified by the
SCCA. The SIR or Flat Plate restrictor must be sized in whole or 0.5mm increments. Dyno data also must
be submitted for restrictors 1.0 and 2.0mm on either side of the restrictor size that permits the engine
to meet the specified peak horsepower."

2020-06-01 P2 Classify Elan NP01 in P2 Table 1

#28812 from Formula/Sports Racing Committee · Rule change · TB 20-06 (2020-06 Fastrack)

In P2 Table 1, classify the Elan NP01 as follows:
P2 Table 1 (Spec Line Cars)

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

2020-09-01 P2 E&O clarification of P2 rear wing requirements

#29205 from Formula/Sports Racing Committee · Rule change · TB 20-09 (2020-09 Fastrack)

In P2, GCR section 9.1.8.D.E.2, make changes as follows:
"A rear wing is allowed. Wing of single or dual element of any shape or chord length is permitted. As viewed from the side, the
wing and all attached elements (Gurney flaps or any other aerodynamic attachments) must, along its full length and at any
individual measurement point, be fully contained by a rectangle measuring 6 inches by 12 inches. This measurement is to be
made approximately parallel to the centerline of the chassis; the measurement rectangle is not required to be parallel to the
ground. Wing support posts that serve no other purpose shall be exempt from this measurement. to fit in a rectangle of 6 inch
height by 12 inch length a As viewed from the side., end plates must fit in be able to pass through a box 14-inches square. This
measurement is to be made approximately parallel to the centerline of the chassis; the measurement square is not required to be

2020-12-01 P2 Balance of Performance adjustments effective 01-01-2021

#29822 from Formula/Sports Racing Committee · Rule change · TB 20-12 (2020-12 Fastrack)

In P2 Engine Table, Spec Line B.1, effective 01-01-2021 change restrictors as follows:
In P2 Engine Table, Spec Line E, effective 01-01-2021 change notes as follows:
"Group CN non-composite chassis with stock Honda K20A-FD2 must use stock Honda intake manifold with 64mm single throttle
body with 55 50mm flat plate intake restrictor at 1500 lbs. minimum weight."
In P2 Table 1, FIA Group CN non-composite chassis spec line, effective 01-01-2021 change restrictor as follows:
P2 Engine Table
Spec
Line Engine Series Max. Displ. (cc)

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

2021-03-01 P2 Add a new spec line for a 2-cycle, 3-cylinder engine up to 820cc

#30272 from Formula/Sports Racing Committee · Rule change · TB 21-03 (2021-03 Fastrack)

In P2 Engine Table, add a new spec line as follows:

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

2021-05-01 P2 E&O tonneau cover provision in cockpit opening section

#30459 from Formula/Sports Racing Committee · Rule change · TB 21-05 (2021-05 Fastrack)

In P2, GCR section 9.1.8.D.D.7.c, make changes as follows:
"Allowed equipment would include batteries, ballast, fire bottles, data recording devices, and cool suit
equipment, providing provided such equipment is securely attached to the car. Tonneau covers are allowed in order to meet
minimum dimensions."

2021-05-01 P2 Remove effective dates in Table 1

#30468 from Formula/Sports Racing Committee · Rule change · TB 21-05 (2021-05 Fastrack)

In P2 Table 1, AMAC, Asteck, Cheetah, Decker, Fox, LeGrand, Converted F5 spec line, change as follows:
"Effective 01/01/2021"
In P2 Table 1, AMAC-AM5, Fox-2-Seater, Zephyrus, Decker 1/2 spec line, change as follows:
"Effective 01/01/2021"
In P2 Table 1, FIA Group CN non-composite chassis spec line, change as follows:
"Effective 01/01/2021"

2021-05-01 P2 E&O Maximum Valves Per Cylinder

#30560 from Formula/Sports Racing Committee · Rule change · TB 21-05 (2021-05 Fastrack)

In P2 Engine Table, Spec Line B.1, add the maximum valves per cylinder as follows:
"4"
In P2 Engine Table, Spec Line B.2, add the maximum valves per cylinder as follows:
"4"
In P2 Engine Table, Spec Line B.3, add the maximum valves per cylinder as follows:
"4"

2021-08-01 P2 F5 P2 Conversion

#30856 from Club Racing Board · Rule change · TB 21-08 (2021-08 Fastrack)

In P2 Table 1, AMAC, Asteck, Cheetah, Decker, Fox, LeGrand, Converted F5 cars spec line, change the notes as follows:
"Converted F5 cars must retain suspension compliant with F5 requirements and meet all P2 non-spec line requirements except
minimum width is 55 inches."

2021-08-01 P2 Clarify minimum body width requirement

#30859 from Formula/Sports Racing Committee · Rule change · TB 21-08 (2021-08 Fastrack)

In P2, GCR section 9.1.8.D.D.3, add the following:
"The minimum body width between the front and rear wheels as viewed from above shall not extend inwards beyond a vertical
plane connecting the centerlines of the front and rear tires."
Ralt RT40, Ralt RT41, Swift 008, and Swift 014

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

2021-09-01 P2 P2 CN Engine Rebuild Clarification

#31000 from Jeff Shafer · Rule change · TB 21-09 (2021-09 Fastrack)

In P2 Engine Table, Spec Line E, change the notes as follows:
"Must use stock Honda OEM parts as listed in CN Honda K20A-FD2 Parts List found here:
https://www.scca.com/pages/technical-forms-anddownloads. No machining allowed. Balancing, porting, and polishing are
prohibited. Engine rebuilds that include valve jobs and/or cylinder honing must strictly adhere to published factory service
procedures."