Proposed Rules Clarifications

[Greg Amy]

Clarification of Turbocharged Cars


9.1.4.G.17 currently begins:

"Cars utilizing forced induction may not have a boost controller within reach of the driver. A car must enter pit lane to have the boost level changed by the crew if necessary. Competitors must be prepared to demonstrate the boost adjustment process to officials."

Cut the subsequent lines from that paragraph and insert as new line 9.1.4.G.2, and move all following lines down.

"Unless otherwise noted, the follow restrictions apply to turbochargers.
- Turbocharging is permitted only with a factory turbo/engine combination; turbochargers may not be added to engines that did not originally come equipped with one.
- Swapping of turbochargers between engine makes and models is prohibited.
- The inlet restrictor (if required) shall be positioned in the compressor inlet housing.
- Supercharged cars may be approved on a case-by-case basis. Contact the Club Racing Technical Office for details."

[Greg Amy]

Move cam allowances to individual class specs.

9.1.4.G.5, change paragraph to:

"Alternate camshafts are allowed; see individual class regulations for lift limits. Camshaft timing is free."

Insert 9.1.4.1.D.6, Valve lift is limited to .600 inches

Insert 9.1.4.2.B.5, Valve lift is limited to .600 inches

Insert 9.1.4.3.B.6, Valve lift is limited to .425 inch for 4 valve/cylinder engines, .425 inch intake and .450 inch exhaust for 3 valve/cylinder engines, and .450 inch for 2 valve/cylinder engines.

[Greg Amy]

This one is truly for only the rules nerds...


Aero/Bodywork cleanup rules.

9.1.4.C.1 (Bodywork)
- Delete sentence "OEM or aftermarket spoilers and wings are permitted." It is redundant to, and superceded by, similar verbiage in 9.1.4.D.2
- Cut all sentences after "A photographic replica is not sufficient," to be moved to Aerodynamic Devices section.
- Insert the following sections before current 9.1.4.D.3 (Aerodynamics) and renumber 3 appropriately:
9.1.4.D.3 A close-out panel may be mounted behind the grille.
9.1.4.D.4 OEM side skirts may be used if they were available on the car from the dealer provided they meet the minimum ride height rule.
9.1.4.D.5 Aftermarket side skirts may be used provided they meet the minimum ride height rule, have no openings/ducts in them other than for jacking insert(s), are no wider than the approved fascias, do not extend any higher than the bottom of the door and do not reinforce the chassis.

9.1.4.D.1.a, cut sections encompassing "STO and STU" and "STL", to be moved to individual class sections.
Add 9.1.4.D.1.d: See individual class regulations for further restrictions

9.1.4.1, STO, insert new section B, "Aerodynamic Devices" and renumber subsequent (to keep in same order as main sections)
Add 9.1.4.1.B.1 Front Splitter
Add the following subsections:
a. The front splitter must not extend more than 2.0 inches past the original or approved bodywork as viewed from above for the entire profile of the splitter.
b. The splitter shall not extend laterally any further than the widest point of the outside sidewall of the front tires with the wheels pointed straight ahead. Additionally, the splitter may not extend more than 2.0 inches beyond the bodywork, regardless of where the outside edges of the front tires are.
c. The splitter may have vertical deviations, fences, etc., only if they are part of the production bodywork for street use.

9.1.4.2, STU, insert new section B, "Aerodynamic Devices" and renumber subsequent (to keep in same order as main sections)
Add 9.1.4.2.B.1 Front Splitter
Add the following subsections:
a. The front splitter must not extend more than 2.0 inches past the original or approved bodywork as viewed from above for the entire profile of the splitter.
b. The splitter shall not extend laterally any further than the widest point of the outside sidewall of the front tires with the wheels pointed straight ahead. Additionally, the splitter may not extend more than 2.0 inches beyond the bodywork, regardless of where the outside edges of the front tires are.
c. The splitter may have vertical deviations, fences, etc., only if they are part of the production bodywork for street use.

9.1.4.2, STL, insert new section B, "Aerodynamic Devices" and renumber subsequent (to keep in same order as main sections)
Add 9.1.4.3.B.1 Front Splitter
Add 9.1.4.3.B.1.a The front splitter/spoiler must not extend past the approved bodywork as viewed from above for the entire profile of the front fascia.

9.1.4.D. 2, Renumber first paragraph as subsection "a" and renumber second paragraph as sub section "b".
9.1.4.D.2.a, cut entire sections encompassing "STO" and "STU and STL".
Add 9.1.4.D.1.c: See individual class regulations for further restrictions

9.1.4.1, STO
Add 9.1.4.1.B.2 Rear Wing
Add the following subsections:
a. The rear wing is limited to a single element with a chord length of 12.0 inches, including any wicker.
b. The entire wing assembly may be no wider than the widest part of the car, not including fender flares/lips and mirrors, or a maximum width of 72.0 inches, whichever is the lesser.
c. The entire rear wing assembly, including the end plates and any wicker , shall be mounted level with, or below, the peak of the roof.
d. The trailing edge of the rear wing may be mounted no further rearward than the center of the rearmost part of the approved bodywork.
e. Wing end plates must not exceed 144.0 square inches.

9.1.4.2, STU
Add 9.1.4.2.B.2 Rear Wing
Add the following subsections:
a. Wings shall be a single element with a maximum chord length of 8.50 inches, including any wicker.
b. The entire wing assembly may be no wider thana maximum of 48.25 inches.
c. The entire rear wing assembly, including the end plates and any wicker, shall be mounted a minimum of 6.0 inches below the peak of the roof. Cars with a wagon-style or hatchback body (e.g., Mazda Protege 5, Civic hatchback) may have the rear wing mounted a maximum of 4.0 inches above the roofline. The mounting position will be measured between the highest points of the roof and the wing assembly.
d. The trailing edge of the rear wing may be mounted no further rearward than the center of the rearmost part approved bodywork.
e. Wing end plates must not exceed 64.0 square inches.
f. APR performance wing GTC-200 part #AS-104801, variable cord length (8.75” Inner/6.75” Outer), is permitted.

9.1.4.3, STL
Add 9.1.4.3.B.2, Rear Wing
Add the following subsections:
a. Wings shall be a single element with a maximum chord length of 8.50 inches, including any wicker.
b. The entire wing assembly may be no wider thana maximum of 48.25 inches.
c. The entire rear wing assembly, including the end plates and any wicker, shall be mounted a minimum of 6.0 inches below the peak of the roof. Cars with a wagon-style or hatchback body (e.g., Mazda Protege 5, Civic hatchback) may have the rear wing mounted a maximum of 4.0 inches above the roofline. The mounting position will be measured between the highest points of the roof and the wing assembly.
d. The trailing edge of the rear wing may be mounted no further rearward than the center of the rearmost part approved bodywork.
e. Wing end plates must not exceed 64.0 square inches.
f. APR performance wing GTC-200 part #AS-104801, variable cord length (8.75” Inner/6.75” Outer), is permitted.

[Chip42]

This one is truly for only the rules nerds...

I resemble that remark

9.1.4.1, STO, insert new section B, "Aerodynamic Devices" and renumber subsequent (to keep in same order as main sections)
Add 9.1.4.1.B.1 Front Splitter
Add the following subsections:
a. The front splitter must not extend more than 2.0 inches past the original or approved bodywork as viewed from above for the entire profile of the splitter.
b. The splitter shall not extend laterally any further than the widest point of the outside sidewall of the front tires with the wheels pointed straight ahead. The splitter may not extend more than 2.0 inches beyond the bodywork, regardless of where the outside edges of the front tires are.
c. The splitter may have vertical deviations, fences, etc., only if they are part of the production bodywork for street use.

9.1.4.1, STO
Add 9.1.4.1.B.2 Rear Wing
Add the following subsections:
a. Wings shall be a single element with a maximum chord length of 12.00inches, including any wicker.
b. The entire wing assembly may be no wider than the widest part of the car, not including fender flares/lips and mirrors, or a maximum width of 72.0 inches, whichever is the lesser.
c. The entire rear wing assembly, including the end plates and any wicker , shall be mounted level with, or below, the peak of the roof.
d. The trailing edge of the rear wing may be mounted no further rearward than the center of the rearmost part of the approved bodywork.
e. Wing end plates must not exceed 144.0 square inches.

9.1.4.1.B.1.b for clarity - the "aditionally" term is unneeded and clunky.
9.1.4.1.B.2.a to match the stylings of the other classes' rules and to clarify the 12.00" maximum chord, in lieu of the current wording which suggest that a wing must be 12.00" in chord, no more, no less. if I'm worng on that point then this would be a change, not a correction.

[Greg Amy]

the "aditionally" term is unneeded and clunky.

Agreed.

9.1.4.1.B.2.a to match the stylings of the other classes' rules and to clarify the 12.00" maximum chord, in lieu of the current wording which suggest that a wing must be 12.00" in chord, no more, no less.

Nice catch. It's probably a left-over from the World Challenge rules, but I *think* STO is intended to be a maximum of 12", not an absolute number. Yet again something to pass through the STAC, and do a change request as needed. - GA

[Andy Bettencourt]

Nice job Greg, that's a lot of work there.

[Matt93SE]

Nice work. Keep going!

[Chip42]

Move cam allowances to individual class specs.

9.1.4.G.5, change paragraph to:

"Alternate camshafts are allowed; see individual class regulations for lift limits. Camshaft timing is free."

Insert 9.1.4.1.D.6, Valve lift is limited to .600 inches

Insert 9.1.4.2.B.5, Valve lift is limited to .600 inches

Insert 9.1.4.3.B.6, Valve lift is limited to .425 inch for 4 valve/cylinder engines, .425 inch intake and .450 inch exhaust for 3 valve/cylinder engines, and .450 inch for 2 valve/cylinder engines.

while you're in there might as well make STL (your 9.1.4.3.B.6)

Valve lift is limited to .425 inch. 3 valve/cylinder engines are limited to .425 inch intake and .450 inch exhaust, 2 valve/cylinder engines are limited to .450 inch.

In order to accomodate the 5 valve/cyl engines (VW 1.8L 20V Turbo in USDM, some more if the JDM gates open)

[Greg Amy]

while you're in there...

Good point, though I think that may fall under a "rules change". I'll pass it by the committee, and submit a change request if needed. Thanks!