#25837 T1 publish new class philosophy and direction

conform with the requirements of GCR Section 9 unless this Category is specifically exempted from said
requirements. OEM specifications are as delivered from the manufacturer. In no way are any category rule
modifications, swaps, updating or backdating to be performed to any component of the complete engine including
intake and throttle body unless specifically allowed in the spec line. Specifically, any spec lines that contain the
phrase or acronym OEM in the maximum displacement or engine notes section of the spec line, MUST adhere to
OEM specs, EXCEPT engine bore. These engines may be bored out to a maximum of .040” over standard bore size.
These specifications are presented as an adjunct to your Factory Shop Manual. They are not meant to supersede
the information that is in your manual that legitimately applies to your make, model, and year of car with the
exception of stated allowances on the spec line OR allowances in the category rules. Updating and backdating of
any component is specifically not permitted unless the models are listed on the same specification line or the
category rules allow an open allowance and you choose to use an OEM part. No unlisted models or factory options
are eligible unless the vehicle model is on the spec line. If no specific model or options, option packages are listed
on the spec line, the classified car is the base model with no options. These specifications reflect the best
information available at the time of publication. Any error found will be updated when reliable specifications from
the factory/factory distributor/aftermarket supplier or other sources recognized by SCCA, Inc. In the case of
foregoing exceptions, the TCS will hold priority. Voids or mistakes that may occur in the TCS do not allow you to
change your vehicle to conform to the TCS.
T1 Category Purpose and Philosophy:
The intent of the T1 category is to allow competition of production-based vehicles, at a moderate (limited prep) to
high level (full prep) of preparation and performance allowances, using DOT approved tires. Vehicles in this
category must be identifiable with vehicles offered for sale to the public and available thru manufacturer
distribution channels within the US. Alternate cars may be approved on a case by case basis but will be limited to
factory-based models. The T1 philosophy is taking a production-based vehicle and applying safety equipment and
sensible and widely available performance modifications to create a Limited Preparation spec line. There will be
some case by case Full Preparation vehicles permitted in the T1 category, however the T1 category will become
almost exclusively a Limited Preparation class over time and Full Preparation vehicles or modifications that are not
Limited Preparation in nature will be more appropriate for the GT category and not T1. Cost controls and
complexity controls will be strongly considered with car classifications and permissible allowances or modifications.
Factory produced race cars will be considered on a case by case basis with a bias toward no additional performance
modifications or allowances and classed as Limited Preparation only. Any new vehicle classifications will be classed
as Limited Preparation level only. Non-OEM forced induction requests will be considered on a limited case by case
basis, however if classified will be restricted to a Limited Preparation level. Permitted allowances will first consider
OEM or manufacturer available allowances before aftermarket allowances are considered. The T1 overarching
philosophy is to make Limited Preparation vehicles more attractive in T1 than Full Preparation vehicles while
controlling cost and complexity.
Engine swaps: Will be considered on a case by case basis as cars age or upgrade kits become available. These
engine swaps will only be within the same family of manufacturer (Chevy-Chevy, Ford-Ford) and must be the same
architecture and layout. Engines may not be bored/stroked unless specifically permitted.
T1 car eligibility: Cars are eligible for the class when they appear on a specification line and with the specific
allowances permitted. Allowances that are permitted are not mandatory and a vehicle may race without an
allowance that is permitted (OEM part) within the T1 rules and limitations. In addition, T2 cars may race in the T1
category – one class above their T2 class if they are in a T2 legal configuration that conforms to the T2
specifications and allowances as classified in T2.
Limited T1:
See Limited T1 specification lines for the list of cars permitted to run in T1 in a limited preparation level
configuration. These cars shall be prepared to the T2 level of preparation found in 9.1.9.2. Aftermarket headers
allowed. Limited prep cars running stock OEM manifold/headers as delivered may subtract 50lbs. from the specified
weight.