ChampCar Endurance Series

ChampCar Tech Desk

Official channel for ChampCar technical questions, interpretations, and VPI requests.

Before you submit a ticket

The Tech Desk is for rules clarifications and technical questions. It is not a post race tech line, a place to protest results, or a place to fish for how other teams built their cars.

Most questions can be answered by reviewing the current BCCR Rulebook. Please read the applicable section before submitting a ticket.

If your question is already covered clearly in the BCCR, your ticket may simply be answered with a reference to the rulebook section.

VPI request checklist

For all Vehicle Performance Index (VPI) requests you must include:

  • Year, make, model, and trim level
  • Engine size and engine horsepower
  • Drive type: FWD, RWD, AWD, or 4x4
  • Transmission type: automatic or manual
  • Car weight and all factory options that affect performance
  • A link to the vehicle on automobile-catalog.com or another site with full specifications if it is not listed there

Requests that do not include all required info and research will be denied without review.

Open BCCR Rulebook Tech Desk Home
ChampCar ChampCar Tech Desk Knowledgebase
Engine & Cooling
Suggested knowledgebase articles:

Knowledgebase Engine & Cooling

Articles in this category

2019-11-28 - Hand Tool Mods

Tech interpretation and enforcement is that any work done to an engine with a grinder, Dremel or fil...

3,022
(653)

2020-01-10 - Coolant Reroute

Q.What is the points cost for a head Coolant Reroute (any car)? A.Update 1/16/2024Coolant reroute is...

1,599
(298)

2020-01-10 - Heat Shield gasket

Q.Intake Manifold: For the intake manifold gasket, can we use this? https://hondata.com/heatshield-m...

729
(333)

2020-01-10 - Oil Filter Cooling Fins

Q.Should points be assigned if cooling fins (of any sort) are added to an oil filter for the purpose...

970
(288)

2020-01-10 - Accusump / Oil Accumulator Acccessories

Q.We are likely getting a Moroso Oil Accumulator, which is 10pts in the BCCR. Does this include the ...

888
(319)

2020-01-14 - BMW E46 heater bypass kit

Q.Bimmerworld offers a kit to plug the cooling lines normally routed to the heater core (PN 100.64.5...

3,219
(587)

2020-01-17 - Engine Casting Number - L28

Q. Nissan 280z 1977Hi, this is Rod, team captain for the Flyin' Hawaiians & 2 White Guys Car #82...

919
(250)

2020-01-20 - BMW E46 exhaust manifold

Q. What is the point value charged to run the BMW E46 vehicle with OEM BMW E36 exhaust manifolds (as...

1,328
(251)

2020-01-30 - Non-OE Cylinder Heads

Q.Car: 1986 Ford Mustang LX with 5.0 V8Per 2020 BCCR: "Cylinder head(s), non-OE and/or non-matching ...

2,094
(423)

2020-02-27 - Non-OE Oil cooler

Q1.1989 BMW 325i e30 - Oil CoolerIs it acceptable to replace the factory oil cooler with an aftermar...

1,078
(623)

2020-03-20 - Intake Manifold Modification

Q.If one were to:1. Modify a stock, cast aluminum intake manifold by cutting length out of runners, ...

1,182
(338)

2020-03-20 - Head Swaps

Q. If I were to do a head swap, would the head be required to come off of a car on the VPI list?Woul...

1,026
(335)

2020-03-20 - GT40/GT40P & Cobra/Explorer Intakes

Q.I have previously cleared this with Mike C so I want to re-clarify that for a 1993 Cobra engine th...

21,397
(432)

2020-03-20 - Repurposed Heater Core

Q. I have planned to add an oil cooler to further protect the engine. Can I repurpose the removed fa...

1,075
(350)

2020-04-01 - Fuel injectors

Q.I would like to utilize OEM fuel injectors from a different vehicle (same brand & same year) w...

847
(345)

2020-06-02 - Individual Throttle Bodies (ITB)

Q.Is there an established point value for ITB's?Technically they replace the Intake Manifold and Car...

1,236
(397)

2020-11-11 - Aftermarket Pistons

Q1.What is the value of an aftermarket piston if kept at the same compression ratio? Q2.What would t...

1,115
(1)

2020-11-11 - BMW M50/M52/M54 water pump

Q.The "Stewart" water pump is a common upgrade for the BMW M50/M52/M54 engines. Has a point value be...

804
(1)

2020-11-12 - K20A2 block interchange with K20Z3 block

Q.My team bought a parts car to replace our damaged engine.  After removing the engine and deliverin...

759
(0)

2020-11-12 - Header Insulation

Q.How many points for header wrap or a thermal blanket that goes on top of the exhaust header shield...

748
(1)

2021-01-01 - EGR Delete Plate

Q.Will EGR delete block off plates have any value on them? As we are allowed to delete the Cats I am...

775
(1)

2021-01-01 - Overbore Engine

Q.If we build our engine 40 over - will that push us into EC, or cost us points? If points, how many...

966
(0)

2021-01-01 - B18A1 interchange with B18B1

Q.We have a 1992 Acura Integra build with the B18A1 engine. However the A1 is increasingly difficult...

2,076
(2)

2021-01-02 - Alternator Mount

Q.I removed the smog pump and then had to make a new upper mount for the stock alternator. I used so...

730
(2)

2022-01-22 - Upgraded Oil Pump

Q.How many points for non-OE oil pump? A.As long as your replacement oil pump has the stock type and...

609
(1)

2022-01-22 - Exhaust Manifold Flange

Q:Am I allowed to replace the flange on an exhaust manifold?The stock flange design makes removal of...

580
(0)

2024-02-20 - Power Steering Pulley

Q:Since power steering systems are open under the BCCR 4.7.2. Fixed Point Value List assignment of "...

673
(2)

2022-01-31 - Ignition System Points Clarification

Q:Reading the BCCR has revealed the following point adders:• Distributor, non-OE, or aftermarket ign...

642
(0)

2022-12-29 - Removal of Cat Converter from exhaust manifold

Q.I am looking to get an interpretation of the no additional points rule 4.7.2 for "exhaust systems ...

1,598
(1)

2023-02-24 - Aftermarket Cooling fan

Q.Can an OEM electric radiator cooling fan be replaced with an aftermarket electric cooling fan with...

513
(1)

2023-02-25 - Aluminum radiator with transmission cooler

Q:Our car has a transmission cooler built in to the stock radiator that we use to cool engine oil (e...

581
(1)

2023-02-25 - Timing wheel, ECU & Sensors

Q:We have an MS3 Pro PnP ECU. We had to install a 36-2 timing wheel to replace the OEM 4 tooth timin...

538
(1)

2024-02-13 Throttle Body Cable TO Drive by Wire

Q. What is the ruling on going the opposite way of the rule below? Going from a cable TO a DBW.4.7.3...

821
(0)

2023-02-25 - Aftermarket Non OE Cylinder Head and Valve Train

Q:If you take a cylinder head swap off the VPI list on a OHC engine you acquire the cams and valve t...

853
(2)