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DRAFT!
4.2 Tuner Over or TO Division
a) All production vehicles certified by the United States Department of Transportation for street use at their date of manufacture.
b) 8:1 power to weight ratio. 2100 lb minimum weight.
c) No tube frame chassis conversions will be allowed.
d) Vehicle must retain its stock unibody, and sub-frames. Any alterations to these components must be pre approved by the Redline MotoIQ Pacific Tuner Car Series Directors. Only alterations to improve safety will be considered, such as to install fuel cells or lower floor for more driver head to roll hoop clearance will be allowed. Strut towers may be modified for the addition of camber plates. Once the minimal requirements for safety are met, roll cages are open with no restrictions on tube count, gussets or passes thorough firewalls and bulkheads as long as it is not done to alter the structure of the unibody. The intent of this rule is to encourage the construction of the safest possible cages.
e) The unibody may not be modified in the area between the front and rear shock towers, except where allowed in these rules. The engine location must remain as stock and cannot be changed. If an engine swap is done, the factory firewall and cross member cannot be altered except for minor clearancing. Minor clearancing is moving less than 100 square inches forward, sideways or backwards less than two inches.
f) AWD cars have a tire cross section width limited to 245, other cars are limited to 275 width. R35 Nissan GT-R is limited to tires of the stock width.
g) Tires must be DOT certified with a UTQG of 50 or higher. Cars must qualify and race on the same set of tires, a tire can be replaced if needed for safety reasons.
h) Brakes are open to any system commercially available to any competitor. Carbon Carbon and MMC rotors are not allowed. Brake pad material is open.
I) Shock absorbers, springs and anti roll bars are open. Shock absorbers must stay in their stock location, for instance, converting the shocks to inboard with progressive rocker arms and push rods would not be allowed. In cabin adjustable anti roll bars are not allowed.
J) The suspension configuration must remain as stock, for instance Beam axles cannot be converted to IRS, Strut type suspension cannot be converted to multi link or A arm. The factory suspension pick up points must be retained and used. The pick up point locations on the factory unibody or sub-frame can be relocated within a 1 inch circle from the stock location. Factory pick up points can be reinforced as long as the stock unibody or sub-frame structure remains.
k) The suspension arms and links can be replaced with adjustable aftermarket parts with spherical bearings or harder bushings if they are available for purchase by any competitor.
l) Suspension bushings may be replaced with bearings or bushings of alternative material.
m) The stock spindles and uprights must be retained.
o) Dog engagement transmissions and sequential shifters are not allowed
p) Clutches and flywheels are open
q) The stock body must remain, however aftermarket aero kits are allowed as long as they are commercially available to any competitor. No part of the body including the aero kit can extend past the lower edge of the wheel rim at normal ride height. Any removable body panel may be replaced with composite as long as the parts are available to any competitor and the 8:1 power to weight ratio is maintained. Skinning parts of the unibody that are not removable such as the quarter panels and roof with composites is not allowed. Air dams can be modified with splitters. The splitter cannot extend more than 6″ from the base of the air-dam. A belly pan may be used but cannot extend past the front wheel opening. Rear diffusers may be used but cannot start forward of the rear axles and extend past the edge of the rear bumper. Side skirt fences cannot extend more than 2″ past the lower edge of the side-skirt.
r) Rear wings are allowed; wings cannot be wider than the widest part of the body nor extend past the rear edge of the bumper nor extend above the roofline Wing mounts must be sturdy and solidly attached to the body or preferably the chassis. Suspension mounted wings are not allowed.
s) Active aero is not allowed.
t) Engine modifications are open provided that the 8:1 power to weight ratio is not exceeded. Engine swaps are allowed as long as the power to weight ratio is maintained and the unibody is not altered more than as described in section e).
u) Any commercially available transmission, differential, limited slip or differential gear ratio may be used. Transmissions must be production based. Racing transmissions like Extrac, G-Force, Quaife, Wiessman etc are not allowed. Constant mesh gear set conversions are not allowed. No alternative transmission gear ratios are allowed other than swapping different OEM factory gears between transmissions of the same type. No bespoke parts are allowed although different parts may be swapped from other cars as long as they are production based.
