Technical Bulletins:

 

TECHNICAL BULLETIN 5-4-16
TT123 4-door Sedan or 5-door Wagon

7.4.2 Modification Factors

Non-Production Vehicle: = -0.4

OEM Body Type:                                                          4-door Sedan or 5-door Wagon = +0.2
(Only applies to a vehicle originally manufactured as a street legal production factory vehicle)

Production Vehicle Body Modifications:                Modification of the OEM roof line/shape = -0.3
(none of these apply to                                         Modification of the floor pan for exhaust clearance
Non-Production vehicles)                                                     and/or the rocker panel for side exit exhaust only = -0.2
.                                                                              TT3 ONLY: OEM Aero (see 7.3.2.D) = +0.4

 

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TECHNICAL BULLETIN 5-4-16
TT3 “OEM Aero” Modification Factor

7.3.2
D) TT3 Only Production Vehicle Aerodynamics (does not apply to TTU, TT1, or TT2)

Production vehicles that maintain their unmodified OEM trim model body lines and do not have non-OEM aerodynamic aides or modifications may assess the Modification Factor for “OEM Aero” in calculating the “Adjusted Wt/HP Ratio” (7.4). Under this specific rule, an aerodynamic aide is considered non-OEM if it did not come configured on the vehicle from the manufacturing factory on the competing vehicle’s trim model. There is no updating or backdating across trim models or the addition of dealer installed OEM options permitted.

Some examples of items not permitted under the “OEM Aero” Modification Factor would be the addition of Z06 or Z07 Aero aides to a base trim Corvette, or the Laguna Seca Aero package on a Mustang GT.

 

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TECHNICAL BULLETIN 5-3-16
NASA NP01 in TT

Appendix A—Technical Bulletins for Specific Models/Items

NP01 (TT3):
The NASA NP01 is only permitted to compete in TT3 as follows:
1) The Minimum Competition Weight must be equal to or greater than 1800 lbs.
2) The vehicle must be 100% compliant with all NP Series rules, including the specified Toyo 235 x 17 RR tires.
3) The vehicle may compete in regional competition without having chassis Dynamometer Dynojet pre-competition testing, but the driver/owner must still complete a pre-competition TT Car Classification Form.
4) Competition in a NASA Championship event requires pre-competition Dyno testing.
5) The vehicle is still subject to post-competition Dyno inspection, and must be compliant with the 10.0:1 limit of “Adjusted Weight/Power Ratio”.
Modification Factors include -0.3 for weight, -0.4 for Non-Production, -0.6 for transmission, +0.7 for tires.

 

NP01 (TT1/TT2):
1) The NASA NP01 may compete in TT1 or TT2, but MUST assess the -2.0 Modification Factor for weight under 1800 lbs, REGARDLESS of the actual
Minimum Competition Weight. The vehicle is not restricted to NP “spec” modifications or tires.
2) If the vehicle has a NASA/Elan sealed engine, the vehicle may compete in regional competition without having chassis Dynamometer Dynojet pre-competition testing, but the driver/owner must still complete a pre-competition TT Car Classification Form.
3) Competition in a NASA Championship event requires pre-competition Dyno testing.
4) The vehicle is still subject to post-competition Dyno inspection, and must be compliant with the limit of “Adjusted Weight/Power Ratio” for its class.

 

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TECHNICAL BULLETIN 3-24-16
(Spec) Miata Pre-Approved Dyno Re-classing in Appendix C

The following are additions to the list of pre-approved Dyno Re-classes in Appendix C

Appendix C—Pre-Approved Dyno Re-classing
The following pre-approved Official Dyno Re-classes may be used without e-mailing the National TT Director. The driver should print out the page, and submit it along with the certified Dyno report and the TT Car Classification Form to the regional TT Director.

 

Mazda Miata ’90-’93 (1.6L), no motor swap, non-BTM head, or F/I:

Your ’90-‘93 Mazda Miata 1.6L with a maximum 125 rwhp on a Dynojet, and a Minimum Competition Weight (w/driver) of 2205 lbs, will have a new PT/TT base class of PTE*/TTE* (seven points). Your new base tire size is 235mm. You will not assess modification points for Section B. Weight Reduction or Section C. Engine Mods. However, all other modifications, including transmission and LSD, that are not standard items on a base trim ’90-‘93 Mazda Miata must be assessed points, with the following exception. Only +1 point will be assessed, instead of +3 points under section 5.3.F.4 for the use of a 1997 Miata sub-frame brace, IF the vehicle is also being assessed for size 205 tires, +3 for a Mazdaspeed front chin spoiler, +2 for bump steer/shimming due to the use of Miata “R” model tire rod ends, and +2 for the use of Mazdaspeed sway bars. You must be compliant with the above listed maximum Dynojet HP and Minimum Competition Weight during any tech. inspection.

This option may only be used with a PTE/TTE or higher Final Competition Class.

Please keep a copy of this e-mail and the most recent Dynojet sheets and Dyno Certification Form with the vehicle log book as proof of re-classing. Also, turn in a copy of this e-mail, the Dynojet sheets, and the Dyno Certification Form with your PT/TT Car Classification Form to your Regional PT/TT Director.

Note that the car will still need to be compliant with the Minimum Adjusted Wt/Hp Ratio for whichever Competition Class you choose to run in.

This is an Official, approved, Dyno Re-Class copied from the current TT Rules, Appendix C

 

Mazda Miata ’94-’97 (1.8L), no motor swap, non-BTM head, or F/I:

Your ’94-‘97 Mazda Miata 1.8L with a maximum 127 rwhp on a Dynojet, and a Minimum Competition Weight (w/driver) of 2265 lbs, will have a new PT/TT base class of PTE*/TTE* (seven points). Your new base tire size is 235mm. You will not assess modification points for Section B. Weight Reduction or Section C. Engine Mods. However, all other modifications, including transmission and LSD, that are not standard items on a base trim ’94-‘97 Mazda Miata must be assessed points. You must be compliant with the above listed maximum Dynojet HP and Minimum Competition Weight during any tech. inspection.

This option may only be used with a PTE/TTE or higher Final Competition Class.

Please keep a copy of this e-mail and the most recent Dynojet sheets and Dyno Certification Form with the vehicle log book as proof of re-classing. Also, turn in a copy of this e-mail, the Dynojet sheets, and the Dyno Certification Form with your PT/TT Car Classification Form to your Regional PT/TT Director.

Note that the car will still need to be compliant with the Minimum Adjusted Wt/Hp Ratio for whichever Competition Class you choose to run in.

This is an Official, approved, Dyno Re-Class copied from the current TT Rules, Appendix C

 

Mazda Miata ’99-’00 (1.8L), no motor swap, non-BTM head, or F/I:

Your ’99-‘00 Mazda Miata 1.8L with a maximum 129 rwhp on a Dynojet, and a Minimum Competition Weight (w/driver) of 2305 lbs, will have a new PT/TT base class of PTE*/TTE* (seven points). Your new base tire size is 235mm. You will not assess modification points for Section B. Weight Reduction or Section C. Engine Mods. However, all other modifications, including transmission and LSD, that are not standard items on a base trim ’99-‘00 Mazda Miata must be assessed points. You must be compliant with the above listed maximum Dynojet HP and Minimum Competition Weight during any tech. inspection.

This option may only be used with a PTE/TTE or higher Final Competition Class.

Please keep a copy of this e-mail and the most recent Dynojet sheets and Dyno Certification Form with the vehicle log book as proof of re-classing. Also, turn in a copy of this e-mail, the Dynojet sheets, and the Dyno Certification Form with your PT/TT Car Classification Form to your Regional PT/TT Director.

Note that the car will still need to be compliant with the Minimum Adjusted Wt/Hp Ratio for whichever Competition Class you choose to run in.

This is an Official, approved, Dyno Re-Class copied from the current TT Rules, Appendix C

 

Mazda Miata ’01-’05 (1.8L), no motor swap, non-BTM head, or F/I:

Your ’01-‘05 Mazda Miata 1.8L with a maximum 130 rwhp on a Dynojet, and a Minimum Competition Weight (w/driver) of 2335 lbs, will have a new PT/TT base class of PTE*/TTE* (seven points). Your new base tire size is 235mm. You will not assess modification points for Section B. Weight Reduction or Section C. Engine Mods. However, all other modifications, including transmission and LSD, that are not standard items on a base trim ’01-‘05 Mazda Miata must be assessed points. You must be compliant with the above listed maximum Dynojet HP and Minimum Competition Weight during any tech. inspection.

This option may only be used with a PTE/TTE or higher Final Competition Class.

Please keep a copy of this e-mail and the most recent Dynojet sheets and Dyno Certification Form with the vehicle log book as proof of re-classing. Also, turn in a copy of this e-mail, the Dynojet sheets, and the Dyno Certification Form with your PT/TT Car Classification Form to your Regional PT/TT Director.

Note that the car will still need to be compliant with the Minimum Adjusted Wt/Hp Ratio for whichever Competition Class you choose to run in.

This is an Official, approved, Dyno Re-Class copied from the current TT Rules, Appendix C

 

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TECHNICAL BULLETIN 1-29-16
Mazda Miata Driver Seat Floor Pan

Appendix A—Technical Bulletins for Specific Models/Items

Mazda Miata (’90-’05)–TTB-TTF:
The driver’s side floor pan may be modified to accommodate larger/taller drivers. All modification shall be contained between the transmission tunnel, driver’s side rocker, rear bulkhead and no more than 24” forward of rear bulkhead. The modification shall not extend below the factory floor stiffener/frame rail. The steel used in the modification shall be no thinner than .060”. All modifications shall be welded in place. This modification shall serve no other purpose other than seating position.
The assessment for having this modification will be an additional 100 lbs of weight added to the vehicle’s base weight (or 100 lbs added to a Dyno Re-class if the vehicle is using a Dyno Re-class instead of the base classing table).
(note for TT1-TT3, this modification would necessitate the Non-Production Vehicle Modification Factor)

 


CLARIFICATIONS:

Here are some clarifications that have been made by NASA TT Administration when competitors have had questions about the rules. These clarifications qualify as “Technical Bulletins” under the TT rules, and should be treated as if they were written directly into the rules.

Clarification–Engine Blocks: Aftermarket engine blocks made by companies other than your car’s original manufacturer, or those made by your manufacturer, but that are not identical to your original equipment constitute an ENGINE SWAP. It doesn’t matter if they are the same displacement as OEM. All engine swaps
need to be assessed by the National TT Director on an individual basis. These blocks allow for a much more “aggressive” modified rebuild due to their higher cylinder wall strength, yet the rebuild would otherwise cost the same number of points as someone with the same size block that could not be as aggressive. We will charge you points accordingly, depending on the situation.