Scott wrote:
Not about my class, about my car's.
I have been reading the class rules and am not 100% sure what class I should run in.
The car is a 2002 Camaro SS. It has the factory GM suspension (non 1LE, Bilstein, etc.), UMI panhard bar, torque arm, rear lower control arms. The car has been lowered 2" with springs, I am running the OEM size wheels and tires (17x9.5 and 275/40/17). I also have long tube headers and no cats. Not sure if this car should be in Street Touring or Street Modified. Any help would be appreciated. Thanks, Scott.
If you were Street Touring, it would be STU. I believe you state you have aftermarket rear lower control arms - this would bump you out of STU
Page 141 refers:
G. Solid axle rear wheel drive (RWD) suspension allowances:
1. Addition or replacement of suspension stabilizers (linkage connecting
the axle housing or DeDion to the chassis, which controls
lateral suspension location) is permitted.
2. Traction bars or torque arms may be added or replaced.
3. A Panhard rod may be added or replaced.
4. The upper arm(s) may be removed, replaced, or modified and the
upper pickup points on the rear axle housing may be relocated.
5. The lower arms may not be altered, except as permitted under
Section 14.8.B, or relocated. Methods of attachment and attachment
points are unrestricted but may serve no other purpose (e.g.,
chassis stiffening). This does not authorize removal of a welded-
on part of a subframe to accommodate the installation.
Same wording would apply in Street Prepared, so not there either.
Street Modified would allow the rear suspension based on it's rules. See page 164
E. Suspension components are unrestricted as long as they use the
original attachment points. For the purposes of this rule, “suspension”
is defined as any item that is designed to move when a wheel
is deflected vertically. This includes shocks/struts, control arms,
steering knuckles, uprights, etc., but not tie rods, steering racks, and
subframes. In addition, shock absorber/strut upper mounts are to be
considered suspension components.
Your exhaust won't allow you in Street Touring. You need your Cat Converters
Catalytic converters: Any catalytic converters are allowed, but must
attach within 6” (152.4 mm) of the original unit. Multiple catalytic
converters may be replaced by a single unit. The inlet of the single
replacement converter may be located no further downstream than
6” (152.4 mm) along the piping flow path from the original exit of the
final OE converter. The extents of an OE converter are defined by
the expansion chamber in which the catalyst is contained, regardless
of placement within larger exhaust sections. Replacement converters
must have a minimum catalyst density of 100 cells per inch and
minimum substrate length of 3” (76.2 mm).
Street Prepared would allow your exhaust mods. See page 159
Exhaust manifolds and muffler systems are free, except that they
must be quiet and terminate behind the driver (Section 3.3.3.B.15).
Exhaust heat shields may be removed. Rear- and mid-engine cars
without exhaust headers/manifold systems may use any exhaust
system that meets the requirements of Section 3.5. This permits the
removal of “heater boxes” in order to install headers on such cars.
F. Emission control devices may be modified or removed. This permits
the oil filler cap to be modified or substituted but does not allow valve
covers or cam covers to be altered to install a breather or for any
other purpose.
So, if you have aftermarket rear lower control arms, you are SM, otherwise SP as I read it.
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