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.

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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...

2,968
(643)

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...

1,572
(295)

2020-01-10 - Heat Shield gasket

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

705
(328)

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...

951
(285)

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 ...

857
(312)

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...

3,167
(559)

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...

863
(247)

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...

1,278
(244)

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 ...

2,055
(417)

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...

1,014
(620)

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, ...

1,125
(333)

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...

997
(333)

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...

20,939
(425)

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...

1,044
(348)

2020-04-01 - Fuel injectors

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

824
(334)

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...

1,152
(381)

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...

1,076
(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...

773
(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...

727
(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...

711
(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...

753
(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...

919
(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...

1,839
(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...

701
(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...

576
(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...

548
(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 "...

643
(2)

2022-01-31 - Ignition System Points Clarification

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

602
(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 ...

1,544
(1)

2023-02-24 - Aftermarket Cooling fan

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

483
(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...

543
(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...

506
(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...

773
(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...

822
(2)