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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Chassis & Roll Cage
Suggested knowledgebase articles:

Knowledgebase Chassis & Roll Cage

Articles in this category

2024-1-30-Tubular rear subframe

Q: There is a current rule for Tubular Front subframe/K-member being 10pts (bolt on only). Would thi...

904
(1)

2020-01-04 - Subframe Connectors

Q.Would subframe connectors be a non-OE suspension part or would they fall under materials?

1,084
(334)

2020-01-05 - Patching floor for roll cage

Q.We had to patch a rust hole in the floor where the main roll cage hoop box will mount. Is this con...

1,108
(400)

2020-01-15 - Points for additional tubes

Q.How many points is an additional roll cage tube? A. It is 1 point per 2 linear foot, rounded up. C...

1,183
(231)

2020-01-20 - Seat Drop Pan

Q.We plan on fabricating a drop pan under the driver's seat to allow our tallest driver (6ft 3in) to...

1,124
(558)

2020-02-27 - Roll Cage Welds

Q.Are welds that have been sanded to blend in with some of the cage profile are considered acceptabl...

1,444
(342)

2020-02-27 - Reinforcement due to damage

Q.We suffered a failure at Road Atlanta of our CV joint. This caused the output shaft pulling out of...

787
(381)

2020-02-27 - Bolt-in Roll Cage

Q.If a bolt-in roll cage has had all seams welded (i.e. not bolts used anywhere)pass tech, assuming ...

1,100
(1,084)

2020-03-20 - Cage Backstay Question

Q.Hi. Looking at a Mini Cooper this weekend that appears to have a somewhat unusual rear stay mounti...

1,063
(327)

2020-03-20 - Bumper Structure Replacement

Q.2020 requires "bash-bars" to be added if the car no longer has the OE bumper structure. When these...

1,607
(362)

2020-03-20 - Dashbar Shape

Q. Is it okay if the dash bar has any bends in it? I would like to curve mine forward from the A-Pil...

1,370
(304)

2020-11-12 - Roll Cage Bars Behind Main Hoop

Q.Does an arrangement where two tube are added to the backstay bars such that there is one diagonal,...

1,214
(1)

2021-01-01 - Seat Mount Connection Points

Q.Looking to make sure I've interpreted the rules correctly. I've built my seat mount like several I...

891
(0)

2021-01-01 - Roll Cage to Body Welds

Q.My roll cage contacts my car's body in several locations. Especially along the sill plate (picture...

1,190
(0)

2021-01-01 - Roll Cage Tabs

Q.Looking to add tabs to connect my A-Pillar bars to my A-Pillar. I would like to make the tabs ~10"...

1,085
(3)

2021-01-03 - C4 Corvette Roll Cage

Q.I am building an 89 Corvette I plan to race in ChampCar Endurance Series. As I am designing the ro...

1,672
(3)

2021-11-22 - Roll Cage Tube Size Difference

Q.I am replacing the upper door bar on my roll cage, can I use 1 3/4" tubing if the rest of the cage...

787
(1)

2023-02-25 - BMW E36 front chassis X-brace

Q.Requesting ruling on BMW E36 front X-brace points. BMW has an OE part that replaces a single cross...

824
(1)

2023-02-25 - 1-5/8 Tube

Q:Is there a different wall thickness requirement for cages with 1-5/8" O.D. tubing compared to the ...

688
(2)