Download Updated Rulebook: 2018 Verizon IndyCar Series Rulebook (Full)
NEW FOR 2018: Rules are regularly refined for clarity. The link above is to a regularly-updated 2018 Verizon IndyCar Series rulebook.
IMPORTANT: The rulebook content below was released to all parties on January 16, 2018, and should be considered UNOFFICIAL. No in-season amendments or bulletins are reflected in the below copy. Please refer to the above PDF link for the updated rulebook.
16. ENGINE SPORTING REGULATIONS
16.1. Installation Requirements
16.1.1. Only the Engine supplied by the Engine Manufacturer or its designee and approved by INDYCAR may be used during an on-Track Event. No modifications are allowed.
16.1.2. INDYCAR will seal all Engines prior to installation in the Car. No Car may participate in any on-Track activities during an on-Track Event without the INDYCAR Engine seals in place. Engine seals may not be broken, tampered with, or removed without the approval of INDYCAR.
16.1.3. An INDYCAR-approved air filter must be used as supplied in the specific location.
16.1.4. Only lubricants approved by INDYCAR and the Engine Manufacturer may be used.
16.1.5. No additives may be mixed with an INDYCAR-regulated fluid without prior INDYCAR approval.
16.1.6. Clutch assembly CP8153-DE03-SN carbon plate with steel housing is the only approved clutch.
16.1.7. The bellhousing must be used as supplied by Dallara.
16.1.8. Entrants required to use the INDYCAR supplied torque shaft must maintain a shaft temperature of less than 125° C. Failure to comply with this Rule will require replacement of INDYCAR equipment at Entrant’s expense.
16.1.9. Any heat shields or cooling ducts installed on the Car must not block visual access to the serial numbers on INDYCAR-supplied electronics, the Manufacturer parts, the turbocharger, or the INDYCAR Engine seals.
16.1.10. Only the Homologated exhaust system may be used. Exhausts and exit locations must remain as specified by Dallara or as Homologated. Exhaust/waste-gate pipes must protrude a minimum of 0.250 inches and a maximum of 1.000 inch through the bodywork. The exhaust opening in the sidepod must remain as Homologated with a tolerance of plus or minus 0.500 inches.
16.1.11. All Homologated parts provided by the Engine Manufacturer must be installed and used as supplied without modification.
16.2. Number of Engines and Engine Management
16.2.1. An Entrant may only possess one (1) Engine unless otherwise approved by INDYCAR.
184.108.40.206. An Entrant may not have more than two (2) Engines assigned to them at any one time.
220.127.116.11. If an Entrant is assigned two (2) Engines, the Engine that is not installed (waiting) must always be ready to be installed. If circumstances require the waiting Engine to be installed (i.e. crash or Engine failure) and it is not available, it will be considered to be an Unapproved Change-Out of the waiting Engine and a new Engine will be assigned to the Entrant.
16.2.2. Engine Pool – The Engine Manufacturer is responsible for Engine use planning; however, INDYCAR is responsible for all Engine assignments and will randomly assign Engines to each Entrant from an Engine Pool nominated by the Engine Manufacturer. Each Engine assignment increases the Engine Count for an Entrant by one (1).
18.104.22.168. A new Engine Pool and an Engine use plan must be submitted to INDYCAR prior to each on-Track Event by noon (local time of the Event) the Day prior to on-Track activities.
22.214.171.124. The Engine Pool for the Indianapolis 500® Race must be specified by the completion of Qualifications.
126.96.36.199. If a new Engine Pool is not specified, the Engine Pool from the previous on-Track Event will carry over.
188.8.131.52. All Engines will be assigned from a single pool of Engines with the exception of the Indianapolis 500® Race Event, which allows for one (1) additional Engine Pool to be specified to Entrants participating in the Short Indianapolis 500® Engine Program and Full Indianapolis 500® Engine Program.
184.108.40.206. All Engines presented in any Engine Pool must contain parts Homologated by INDYCAR and applied according to the Rules stipulated in the Engine Regulations.
220.127.116.11. If an Engine is used on-Track that is not from an on-Track Event’s Engine Pool, it will be considered an Unapproved Engine Change Out.
18.104.22.168. An Engine Manufacturer must supply an Engine Pool of sufficient size to assign engines. The following guidelines must be followed:
- Engine Pool must exceed the number of cars needing an engine by at least 1 if that number is less than half the number of cars supported.
- Engine Pool must at least match the number of cars needing an engine if that number is more than half the number of cars supported.
- If the Engines available are not sufficient to supply cars, Engines will be assigned with a priority of crashed engine replacements followed by the next highest mileage Entrant engine. Entrants that cannot receive an assigned Engine due to lack of Engines in the pool must wait until the Engine Pool is nominated for the next event.
16.2.3. Full Season Engine Program – A Full Season Entrant is allowed four (4) fresh-built Engines from the Season Start of a given Racing Season until the Season Start of the following Racing Season. If circumstances require a fifth (5th) or more Engine is used, the following will apply:
22.214.171.124. A fifth (5th) or more Engine may be fresh or partially-used.
126.96.36.199. A fifth (5th) Engine is eligible to earn Engine Manufacturer points if a Full Season Entrant has completed the Full Season Entrant Engine Mileage with its first four (4) Engines. Otherwise, aa fifth (5th) or more Engine does not earn Engine Manufacturer points.
188.8.131.52. Cars that are not eligible to earn Engine Manufacturer Championship Points are removed from the finishing order used for Race finish points in the Engine Manufacturer Championship.
16.2.4. Short Indianapolis 500® Engine Program – Short Indianapolis 500® Engine Programs will only be allocated one (1) Engine for the duration of the Indianapolis 500® Race Event.
16.2.5. Full Indianapolis 500® Engine Program – A Full Indianapolis 500® Engine Program has up to two (2) Engines for the duration of the Indianapolis 500® Race Event.
16.2.6. An Entrant participating in a Short or Full Indianapolis 500® Engine Program may start the Event with an Engine that is sealed prior to the Event with previous Engine miles since the Season Start. If that Engine reaches its Change Out Mileage prior to the Race, it may be changed according to Rule 16.5.1. An Engine changed for this reason would not be considered an Entrant’s Indianapolis 500® Race Engine unless specified as such by the Engine Manufacturer.
16.3. Engine Mileage
16.3.1. The Full Season Entrant Engine Mileage is 10,000 total miles for use in all Team Tests, Open Tests, and Race Events from the Season Start of a given Racing Season until the Season start of the following Racing Season.
184.108.40.206. A substitute Driver is the same Driver for purposes of Engine miles.
16.3.2. All Engine mileage must be reported to INDYCAR and is subtracted from the 10,000-mile allotment, regardless of Use. Mileage is decided from the official lap count from each on-Track Event multiplied by the official Track length. Race parade and pace laps, Oval Qualifications warm-up laps, and initial out lap from each practice and Qualifications session are included. The following will also apply:
220.127.116.11. For all tests where official timing and scoring is not available, the Engine Manufacturer must provide INDYCAR with Engine mileage within forty-eight (48) hours of the completion of a Test.
18.104.22.168. Some Events do not occur on-Track including straight-line Tests. Because timing sheets are not available, mileage calculated by the ECU may be used instead.
22.214.171.124. The Engine Manufacturer must provide INDYCAR with ECU and boost sensor serial numbers within forty-eight (48) hours of the completion of the Event for the purpose of tracking mileage.
126.96.36.199. An Engine’s current total mileage is rounded to the nearest mile.
16.4. Engine Change-Out
16.4.1. Between the last Race of the Racing Season and the Season Start of the following Racing Season, an Entrant may change-out Engines as it deems appropriate without penalty and without the prior approval of INDYCAR.
16.4.2. From the Season Start until the completion of the Racing Season, no Engine may be changed-out without the prior approval of INDYCAR and the Engine Manufacturer. Engine Change-Outs by an Entrant may be specified by INDYCAR as either:
- Approved Engine Change-Out, or
- Unapproved Engine Change-out.
16.4.3. Unless otherwise stated, any Engine that is assigned shall count as one (1) of the fresh-built Engines allotted to an Entrant.
16.5. Approved Engine Change-Outs
16.5.1. Engine Retired – An Engine that has reached an Engine Change-Out Mileage determined by the Engine Manufacturer may be changed out at any time. An Engine changed-out for this reason may not be reinstalled, is removed from the Engine Pool and will have its Engine seals removed.
16.5.2. Team Test Allowance – After the completion of a Race, an Entrant with an Engine installed that would exceed its Engine Change-Out Mileage during a Test may install a lower mileage Engine with INDYCAR approval for the purpose of participating in a Test scheduled between two (2) Races. In this case, the following will apply:
188.8.131.52. The higher mileage Engine from the previous Event must be installed to complete its planned life cycle prior to the start of the next Race Event, or be removed from service with the Engine seals cut. After the next Race Event, the higher mileage Engine will be considered to be Retired and must be Changed-Out according to Rule 16.5.1. The remaining assigned Engine must then be installed to complete its scheduled life cycle.
184.108.40.206. An Entrant must first use Engines from its current allocation.
220.127.116.11. If an Entrant is currently allocated only one (1) Engine, a second, fresh Engine may be allocated to the Entrant for the purpose of participating in the Test.
18.104.22.168. Any Engine installed for the purpose of completing Testing remains allocated to the Entrant and must be installed after the first, higher mileage Engine has completed its life.
16.5.3. Manufacturer Test Engine – An Entrant participating in an INDYCAR, Tire or Engine Manufacturer Test may fit a Manufacturer Engine for that Test without penalty. Such Engine Change-Outs must comply with the Rules. Engine miles used for such Tests do not count against the Full Season Entrant Engine Mileage limit.
16.5.4. Indianapolis 500® Race Engine – For Entrants with multi-Engine programs, a fresh Engine may be fitted before the Indianapolis 500® Race without penalty, subject to availability and the following conditions:
22.214.171.124. Both Engines remain allocated to the Entrant, and both Engines must reach their Change-Out mileage before any other Engines are allocated to the Entrant.
126.96.36.199. After the completion of the Indianapolis 500® Race Event, an Entrant may choose either of these allocated Engines to be installed; however, the installed Engine must remain in the Car until it reaches its Change-Out Mileage.
16.5.5. Once an Indianapolis 500® Engine is fitted to the Car, removal of the Engine prior to the Indianapolis 500® Race is an Unapproved Engine Change-Out.
16.5.6. Special/Non-Race Events
188.8.131.52. A Manufacturer Engine may also be used for specific Special/Non-Race Events with prior approval from INDYCAR.
184.108.40.206. Pit Stop Competition – For the pit stop competition held on Carburetion Day of the Indianapolis 500® Race Event, Engine Manufacturers may substitute any Engines for assigned Engines with INDYCAR approval.
16.5.7. Operating Outside Guidelines – Changing an Engine before the Change-Out Mileage because it has been operated outside of the Engine Manufacturer’s guidelines are subject to the following:
220.127.116.11. Entrant pays the repair costs of the Engine including parts, labor, shipping and travel costs for INDYCAR personnel; and
18.104.22.168. Once the Entrant pays the Engine Manufacturer the repair costs, the Entrant will be credited the unused mileage of the Engine and be supplied a fresh or used replacement Engine from the Engine Pool.
16.5.8. Crash Damage – An Engine that has suffered crash damage requiring a Non-Minor Repair may be changed without an Unapproved Engine Change-Out penalty only if the following conditions are met:
22.214.171.124. The Engine Manufacturer presents evidence of crash damage to INDYCAR;
126.96.36.199. Only parts failed as a result of the crash are replaced;
188.8.131.52. INDYCAR approves the change and assigns the Entrant a fresh Engine from the pool (only if an Engine is not already assigned to the Entrant); and
184.108.40.206. The crashed Engine remains allocated to the Entrant and must be returned when the repair is complete to finish its life before another Engine is allocated.
16.6. Unapproved Engine Change-Outs
16.6.1. Any Engine Change-Out that is not explicitly identified as an Approved Engine Change-Out is considered an Unapproved Engine Change-Out
220.127.116.11. Any Engine that undergoes an Unapproved Engine Change-Out may not be reinstalled, is removed from the Engine Pool and will have its seals removed.
16.6.2. Entrant-Initiated Change-Out – For an Entrant-initiated Engine Change-Out, the Change-Out is considered a Rules violation and the Entrant will be listed in a position at the rear of the Starting Lineup for the next Race, regardless of whether the Change-Out occurs at a Race or Test Event.
18.104.22.168. If an Entrant makes two (2) Unapproved Engine Change-Outs during an on-Track Event, the penalty for the second (2nd) Unapproved Engine Change-Out is served at the following Race.
22.214.171.124. Entrant-initiated Engine Change-Outs lose ten (10) Driver and Entrant points.
126.96.36.199. All mileage remaining on an Engine prior to the Unapproved Engine Change-Out is lost.
188.8.131.52. No Engine Change-Out Starting Lineup penalties are served during the Indianapolis 500®; however, points penalties will be applied. Penalties carried over into or earned at the Indianapolis 500® are served at subsequent Races.
184.108.40.206. Entrants not participating in consecutive on-Track Events do not carry-over any Engine Change-Out penalties.
16.6.3. Entrant Abuse – An Engine may be damaged by the actions of the Entrant including but not limited to the use of non-approved fuels or oils, tampering with the boost control or rev limit functions, continuing to operate the Engine after being informed that a problem has occurred including overheating (“Entrant Abuse”). Changing an Engine before the Change-Out Mileage for Entrant Abuse is subject to the following:
220.127.116.11. Entrant pays repairs costs for the Engine including parts, labor, shipping, and travel costs for INDYCAR personnel.
18.104.22.168. All mileage remaining on the Engine prior to the Entrant Abuse incident is lost.
16.6.4. Removing the Engine to test a Down on Power (“DOP”) claim is an Unapproved Engine Change-Out.
16.7. Down on Power Engines
16.7.1. Entrant Claim - An Entrant claiming an Engine is down on power (DOP) must provide supporting data to the Engine Manufacturer before the claim is reviewed. The Engine Manufacturer may decide if the DOP claim is valid.
16.7.2. Limitation – A DOP claim may not be made after the completion of the next-to-last (penultimate) Race Event of the Racing Season.
16.7.3. On-Track Torque Measurement – An Entrant may request to install an INDYCAR-specified torque measurement shaft to determine whether it is down on power relative to other Engines provided by the Engine Manufacturer. If an Entrant’s request is approved by INDYCAR the following applies:
22.214.171.124. The Entrant must put up a bond of $3,000 USD.
126.96.36.199. If an Entrant already has a shaft installed and they are part of a multi-car Team, another Team member’s car must install the torque shaft.
188.8.131.52. INDYCAR will compare the Entrant’s torque values against the output of other instrumented Entrants running the same Engine Manufacturer’s Engine and will assert whether the DOP claim is valid. No actual torque values will be shared with the Entrant or the Engine Manufacturer, only relative differences.
184.108.40.206. If the measurement does not show that the Engine is DOP beyond 2% of the average Engine power from all the Engine Manufacturers currently installed engines with torque measurement, the Entrant forfeits the bond.
220.127.116.11. If the measurement does show that the Engine is DOP beyond 2% of the average Engine power from all the Engine Manufacturers currently installed engines, the Entrant will be paid back the bond and the Engine Manufacturer will be charged $3,000 USD for the use of torque measurement shaft.
18.104.22.168. Regardless of the outcome of this measurement, the rest of Rule 16.7 still applies.
16.7.4. Manufacturer Agrees with Claim – If the Engine Manufacturer accepts the DOP claim, the Engine Manufacturer informs INDYCAR of the issue. INDYCAR inspects the supporting data and in its discretion, decides if the DOP claim is valid. If it is decided by all parties that the Engine is DOP, INDYCAR shall:
22.214.171.124. Approve the Engine Change-Out; and
126.96.36.199. Assign the Entrant a fresh or used Engine from the Engine Pool for the outstanding miles of the DOP Engine. For Engine mileage purposes, the reworked or rebuilt Engine will count as a substitute for the DOP Engine.
188.8.131.52. The DOP Engine will be considered to have met its full Engine life cycle, be removed from the Engine Pool and may not be reinstalled.
16.7.5. Manufacturer Disagrees with Claim – If an Engine Manufacturer or INDYCAR does not accept that a DOP claim is valid, the Entrant making the claim may, in its discretion, pay the DOP bond to INDYCAR to have the Engine removed from the Car and retested by the Engine Manufacturer.
184.108.40.206. DOP Bond:
220.127.116.11.1. For all Entrants, each DOP claim bond is $50,000 USD.
18.104.22.168. INDYCAR will keep the DOP bond until an Engine power test is completed at the Engine Manufacturer’s venue. The retest of the Engine must be completed within fifteen (15) Business Days of the DOP claim. INDYCAR reserves the right to have an Official present at the test.
16.7.6. DOP Engine Passes Retest – If the DOP Engine retests within two (2) percent of its shipping test performance between 9,000 and 12,000 rpm:
22.214.171.124. The Entrant loses the DOP bond and INDYCAR pays the DOP bond to the Engine Manufacturer;
126.96.36.199. The Entrant pays INDYCAR’s costs for having an Official present at the test;
188.8.131.52. The DOP Engine is returned to the Entrant and installed prior to the next on-Track activity following the DOP test;
184.108.40.206. The DOP Engine is not an Unapproved Engine Change-Out;
220.127.116.11. The rebuilt or reworked Engine that was in the Car during the DOP claim test is assigned to the specific Entrant and must be used once the DOP Engine has completed its life cycle.
18.104.22.168. The Entrant loses ten (10) Driver and Entrant points; and
22.214.171.124. The Entrant will start the next Race from the rear of the Starting Lineup. No Engine Change-Out penalties will be served during the Indianapolis 500® but points penalties will be applied. Penalties carried over into or earned at the Indianapolis 500® will be served at subsequent Races.
16.7.7. DOP Engine Fails Retest – If the Engine retests more than two (2) percent under its shipping test performance between 9,000 and 12,000 rpm:
126.96.36.199. INDYCAR returns the DOP bond to the Entrant;
188.8.131.52. The DOP bond does not increase the next time the Entrant makes a claim;
184.108.40.206. The Engine Manufacturer pays INDYCAR’s costs for having an Official present at the test;
220.127.116.11. The Engine Manufacturer supplies the Entrant with an Engine from the Engine Pool for the outstanding miles of the DOP Engine. For Engine mileage purposes, the replacement Engine counts as a substitute for the Engine that was removed.
16.8. Engine Repair
16.8.1. All Engine repairs during an on-Track Event must have prior approval from INDYCAR.
16.8.2. Minor Repair – A Minor Repair is a repair that can be done without the removal of either the cam cover and/or removal of any INDYCAR-applied seals.
16.8.3. An Engine that requires a Minor Repair, may, with INDYCAR’s approval, be removed from the Car for repair without penalty. Use of the Car on-Track with another Engine is an Engine Change-Out.
16.8.4. If any of the INDYCAR-applied Engine seals needs to be broken or removed, the repair cannot be carried out unless an Official is present and INDYCAR gives prior approval. If the repair is carried out at the Engine Manufacturer’s shop, the Engine Manufacturer pays reasonable pre-approved travel expenses for the Official to be present.
16.8.5. Non-Minor Repair – A Non-Minor Repair is a repair that requires the removal of the cam cover and/or removal of any INDYCAR-applied seals. Non-Minor repairs are only allowed to fix Engines that have suffered crash damage and the following must apply:
18.104.22.168. The Engine Manufacturer provides evidence of damage to INDYCAR;
22.214.171.124.Only one (1) Non-Minor Repair may be carried out on any given Engine during its 2500 life.
16.8.6. Part Replacement – Parts may only be replaced with parts of the same design as those removed or with INDYCAR-approved upgrades.
126.96.36.199. If a Non-Minor Repair requires replacement of the Engine cylinder block casting or cylinder head casting (not including respective covers), it is not repairable and is an Unapproved Engine Change-Out.
16.8.7. Repair Dyno Confirmation – The Engine Manufacturer may run the Engine at its testing facility for the purpose of assuring the Minor Repair is effective. The Engine must be returned to the Entrant before the next scheduled on-Track use of the Car unless it is superseded by another approved Engine Change-Out as follows:
16.8.8. Repair Completion – An Engine Manufacturer has three (3) weeks or before the final Race of the Racing Season (whichever comes first) to complete a Non-Minor Repair on an Engine and return it to an Entrant to be installed. If an Engine cannot be returned, the Engine Change-Out will be an Unapproved Engine Change. Any Engine that was assigned to an Entrant during the Non-Minor Repair remains assigned to the Entrant and must complete its mileage before additional Engines are assigned.
16.9. Partial Season Entrants
16.9.1. Engine Manufacturers will support Partial Season Entrants approved by INDYCAR. Each Partial Season Entrant may use only the Engine supplied by the Engine Manufacturer or its designee and assigned by INDYCAR to the specific Entrant.
16.9.2. A Partial Season Entrant is not entitled to a fresh or zero (0) mileage Engine.
16.10. Engine Inspection
16.10.1. INDYCAR may request an Engine inspection be carried out on an Entrant’s installed Engine after on-Track activities. If the Engine must be removed from the Car, a new Engine is supplied from the Engine Pool. The inspected Engine returns to the Car within twenty-eight (28) calendar days to complete its remaining mileage.
16.10.2. INDYCAR does not pay rebuild costs incurred during any inspection of an Engine or its related parts and subsystems.