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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Suspension
Suggested knowledgebase articles:

Knowledgebase Suspension

Articles in this category

2020-01-10 - Turning an adjustable damper to non-adjustable

Q.If I have a shock/strut that is adjustable (either by height or dampening) If we make the shocks n...

1,519
(323)

2020-08-17 - Droop Limiters / Spring Retainers

Q.I would like to know the point value for Droop limiters.Cable, chain, strap etc used to limit the ...

2,008
(1)

2020-11-11 - Subframe Bushings

Q1.Do subframe bushings (with same locating dimensions) fit under "Suspension bushings: OE replaceme...

1,019
(1)

2020-11-13 - Modified Top Hats

Q.I want to weld on an extension to the OEM top hats to raise the damper shaft in relation to the bo...

1,126
(2)

2020-11-13 - Tender/Helper Springs

Q.Aftermarket, non-OEM size springs are now 5 points per corner.  Does adding a Tender/Helper spring...

960
(0)

2020-11-13 - Non-OE Suspension Component with Heim Joints

Q.If I have a Non-OE Suspension Component that I take 10 points for will I have to take ADDITIONAL p...

1,070
(0)

2022-01-31 - Eccentrics for alignment with repurposed parts

Q:Can I take some steel (from my car) and make holding brackets and a couple of offset washers to ma...

875
(0)

2022-01-31 - End Links with OE Bar

Q:The rule states: Sway bar, non-OE, including end links: 20 pts each axleI understand this means if...

905
(1)

2022-01-31 - Leaf Spring Replacement

Q:Hello, On a Corvette it uses a Mono leaf spring rear suspension. What are the points to change fro...

809
(1)

2022-02-22 - Extended Lower Ball Joints - Revised

Regarding Extended Lower Ball Joints: Both the common Miata Type (left) and Honda Type (right) were ...

1,068
(4)

2022-12-31 - Sway bar spacers

Q.So in order to run the Front anti-roll bar with a <engine swap>, You are required to space t...

705
(1)

2022-12-31 - Locking eccentric bolts

Q.Alignment usually gets' all messed up halfway through the race regardless on how hard you overtigh...

702
(2)

2023-02-25 - Early E36 sway bar end links

Q:At impound on Sunday morning an issue was raised with our car about having the M3 front sway bar e...

1,120
(3)

2023-02-26 - Shock End Heim Joints

Q.If I run shocks with heim joint ends do I have to claim 10 pts per corner for the Hiem joints? The...

823
(2)

2023-02-26 - Bilstein spring perches

Q:I am wondering if you consider the spring perches on bilstein shocks to be adjustable? They have t...

1,417
(7)

2023-05-16 - Schrader Valves

Q:We are looking at using a non adjustable shock. To my understanding this rule allows a rebuildable...

1,228
(1)