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
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...

1,491
(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 ...

1,986
(1)

2020-11-11 - Subframe Bushings

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

997
(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...

1,098
(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...

935
(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...

1,039
(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...

844
(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...

882
(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...

792
(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 ...

1,045
(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...

688
(1)

2022-12-31 - Locking eccentric bolts

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

666
(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...

1,087
(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...

799
(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...

1,388
(7)

2023-05-16 - Schrader Valves

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

1,200
(1)