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oogabubchub

ST5/6 OEM lip clarification

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oogabubchub

Hi, I've been trying to figure out if OEM lips are permitted. I've got an AP1 S2000 and wanted to add an OEM AP1 lip. Based on the Update/Backdate rule and this quote:

Quote

Because the definition of “OEM” is any part that comes from the vehicle manufacturer either as a standard feature, a factory option, or on a factory optional trim model/package of that generation of the street-legal (in the U.S.A.) version of the vehicle, a vehicle may be updated or backdated with such parts without a Modification Factor assessment (applies to those items that would otherwise be assessed one).

I would think that OEM lips being a factory option were permitted without modification factor. Am I reading this right?

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Greg G.

All Aero rules in ST5/6 are based on BTM, not OEM.

3) Modified BTM, non-Base Trim Model (non-BTM), or replaced front fascia
(unless specifically approved in Appendix B:
i) May have nothing attached to it other than specifically allowed items
(above).
ii) May not have canards/winglets molded into it.
iii) Any item that is molded into the fascia during the original manufacturing process that functions as an airfoil, deflector, dive plane, or vortex generator and extends 2" or more past the outline of the immediate surrounding fascia is prohibited. To inspect: a plumb line run across the entire surface of the fascia and bumper shall not have any such item that extends 2” past the line when viewed from above.

 

Here is the entire section

6.1.4 “BTM Aero” Modification Factor
Vehicles that maintain the unmodified Base Trim Model (BTM) body lines, do not have non-BTM aerodynamic aides or modifications, and do not have a rear wing or rear spoiler or rear diffuser may assess the Modification Factor for “BTM Aero” in calculating the “Adjusted Wt/HP Ratio”. Under this specific rule, an aerodynamic aide is considered non-BTM if it did not come configured on the base trim model (BTM) of the vehicle from the manufacturing factory. Except for those vehicle-specific higher level trim models (non-BTM) listed in Appendix B, there is no updating or backdating across trim models or the addition of dealer installed options permitted.
The following are permitted allowances/modifications for vehicles taking the Modification Factor assessment for “BTM Aero”:
1) Flat undertray/belly pan forward of the centerline of the front axle, extending
no lower than the bottom of the front fascia.
2) Removal of a convertible soft top/frame and/or adding a hardtop to a
convertible provided that the hardtop uses a sealed rear window and is OEM, an OEM option, or the same shape and size of an OEM/OEM option top.
3) Lexan front, rear, and rear side windows without uncovered holes.
4) Front wing window/frame removal and/or replacement with Lexan.
5) Hood replacement/modification for venting and/or weight reduction (“aero”
hood pins are permitted).
6) Removal/cutting/drilling of the fascia for engine cooling, air intake, brake
ducting, and transponder mounting purposes.
7) Removal of rain gutters/drip edges, windshield wipers, and mirrors.
8) Rolled or flared fenders (includes add-on flares--only to the extent necessary
to cover the tire as viewed from above—not viewed from the front or rear)
9) NACA ducts, air ducts, or air hoses placed in a side window frame solely for
the purpose of driver cooling.
10) Headlamp, headlight covers, and fog lights may all be removed. The holes
may be left open, used for brake ducts or engine air intake, or must be
covered with material that replicates the shape of the BTM light/cover,
leaving the shape of the BTM fascia intact.

6.1.5 ST6 Aerodynamic Modification Restrictions and Limitations
Active aerodynamic devices and/or modifications (including, but not limited to computerized, cockpit adjustable, self-adjusting, and OEM) are not permitted.
If not using the BTM Aero Modification Factor, aerodynamic parts/devices/aides
shall be limited in ST6 to the following:
1) All of the items listed above in section 6.1.4 “BTM Aero” Modification Factor.
2) Single rear wing or spoiler that does not exceed a height above the roof
line (or windshield frame height for convertibles), or width greater than the
vehicle’s body width, or end plates greater than 12” in length or height, or 12”
protrusion from the rear of the vehicle. Body width does not include flared
NASA Super Touring 5 & 6 (ST5/ST6) Rules 2019 v2.3 Page 11 of 26
fenders, mirrors, splitter, door handles. The Modification Factor listed in
section 6.3.2. will be assessed.
3) Modified BTM, non-Base Trim Model (non-BTM), or replaced front fascia
(unless specifically approved in Appendix B:
i) May have nothing attached to it other than specifically allowed items
(above).
ii) May not have canards/winglets molded into it.
iii) Any item that is molded into the fascia during the original manufacturing process that functions as an airfoil, deflector, dive plane, or vortex generator and extends 2" or more past the outline of the immediate surrounding fascia is prohibited. To inspect: a plumb line run across the entire surface of the fascia and bumper shall not have any such item that extends 2” past the line when viewed from above.
4) Cutting/removal of the rear bumper cover/fascia where it does not cover the
rear frame/bumper cross beam.
5) Complete removal of both the windshield and windshield frame is permitted on
OEM convertible top vehicles, but will be assessed the Modification Factor
listed in section 6.3.2. The OEM cowl may be replaced with a flat cover
between the hood and the dash, but no air deflectors may be added, and the
entire cockpit must remain uncovered.
6) Convertibles may use aftermarket hardtops that are not compliant with 6.1.4.2
above, but they will be assessed with the Modification Factor for
roofline/shape, may not extend rearward of the front edge of the OEM rear
decklid, and the OEM windshield frame location must be preserved.

6.1.6 ST5 Aerodynamic Modification Restrictions and Limitations
Active aerodynamic devices and/or modifications (including, but not limited to computerized, cockpit adjustable, self-adjusting, and OEM) are not permitted.
If not using the BTM Aero Modification Factor, aerodynamic parts/devices/aides
shall be limited in ST5 to the following:
1) All of the items listed above in section 6.1.4 “BTM Aero” Modification Factor.
2) All of the items listed above in section 6.1.5 “ST6 Aerodynamic Modification Restrictions and Limitations”, except that there is no Modification Factor for a
a single rear wing or spoiler.
3) Vertical front air dam (5º tolerance) that follows or extends beneath the
outermost edge of the front and side bodywork/fascia.
4) Single flat, horizontal front splitter that protrudes no greater than 4” from where
it intersects with the fascia or air dam. Along the entire splitter, there must be
at least 1” of fascia or air dam material above/superior to where the splitter
intersects the fascia/air dam, including at any air intake region. A Modification
Factor will be assessed for any non-BTM splitter.

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oogabubchub

Thanks Greg, though I've read through those rules over and over again before posting this and it still isn't clear to me if OEM lips are permitted. Maybe I'm being dense, but mention of "non-BTM" or "replaced front fascia" seem to suggest it's permitted with some restrictions.

What I'm looking for is a clear answer to this question:

If I add a lip (OEM or aftermarket), will it

1) be a free mod

2) require a modification factor adjustment

3) make me ineligible for ST5/6 competition

 

My impression from the rules is the answer is #2, but I don't feel like the rules are explicit enough to say confidently.

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H4CRXSi

The first question is what did a base trim model (BTM) AP1 S2000 come with?  If there was only one (1) trim level of AP1 S2000 available from Honda, then all AP1's will be the same, and this lip, since it would be BTM (available on every AP1 S2000 ever manufactured), would be legal for use and still allow you to take the BTM aero credit...

If this is not a BTM piece, but was a dealer installed option or something along those lines, then yes it would be permitted for use so long as it doesn't have any canards or dive planes incorporated into the design... use of this lip would exclude you from taking the BTM aero credit, but would not incur an additional modification factor...

This is just my way of interpreting the written rules, YMMV.

Regards,

Sam

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