ChampCar Tech Desk

The tech desk is used to ask technical questions and is not to be used as a post race tech line or to phish for how others built their cars. Please reference the BCCR as most questions submitted to the TechDesk can be answered by reading the BCCR. You can download the BCCR here: https://champcar.org/web/rules.php
VPI requests require the year, make, model, trim level, engine size, engine HP, Drive type (FWD, RWD, AWD, 4x4), auto or manual transmission, car weight, and all options. Your request will not be answered if you do not include all of that information. You must use http://www.automobile-catalog.com for all of your information submitted. Include the link to the automobile catalog so we can quickly reference the data. If your car is not listed on that website, please link any website that has the info. If you do not include your research info above, your request will be denied.
Thank you.
The ChampCar Endurance Series Tech Team
ChampCar ChampCar Tech Desk Knowledgebase
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...

179
(0)
2020-01-04 - Subframe Connectors

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

713
(296)
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...

731
(366)
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...

779
(199)
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...

738
(512)
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...

913
(287)
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...

461
(348)
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 ...

608
(778)
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...

634
(271)
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...

1,173
(305)
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...

988
(256)
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,...

676
(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...

456
(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...

702
(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"...

686
(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...

1,058
(2)
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...

416
(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...

229
(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 ...

204
(2)

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