here is the latest version (subject to change)
"We still have aways to go, but here is where we are at right now.
Formula 4
The Formula 4 competition series is designed to be an entry level builderÆs class and the rules are written in an effort to keep it that way. The tenents of this class are Small, Cheap, Lightweight and DIY. If the rules don't specifically allow certain modifications it is very possibly legal, please contact the ruling body for clarification, do not assume they are not allowed. Trying to build new innovative parts and rigs is what this class is about. If someone wants to build a Chainlink or hydrostatic drive vehicle, they can. We are mostly limiting the larger base parts to make sure innovation replaces overkill parts.
35ö tire Max
ò Must use DOT, currently available 35ö tires.
ò No other tires approved.
4 cyl.
ò Any make, model, gas, diesel, propane.
ò 2.7L max.
ò Forced induction OK on engines less than 2.0.
ò Electric OK.
Tranny/T-case
ò Any OE based combination or combinations allowed.
ò No complete aftermarket Transmission or T-case allowed. I.E. Atlas, Lovell, STak.
ò All aftermarket OE upgrade parts allowed: Gears, Alloy shafts, billet cases etc.
ò Front digs OK
Frame/Chassis
ò Any frame or chassis allowed: stock, box, tube all OK.
ò Minimum 6 point mounting cages covering the driver are required.
ò All protective tube work must be a minimum of 1.5ö dia. x .120 wall.
ò All tube work must be at least 3ö from driver with helmet and safety gear on.
ò 52ö minimum width at the beltline between the A pillars and between the B pillars.
ò Rollbar construction must be welded.
Body
ò Must have two seats side by side on same horizontal plane.
ò Must look automotive. Needs a hood, grille and body cladding, headlamps, tailamps and any other items that gives it an automotive appearance.
ò 52ö minimum width at the beltline between the A pillars and between the B pillars.
ò No ôshoehornedö seating positions. Make sure you are comfortable.
ò Body panels can be steel, aluminum, fiberglass, Lexan, plastic.
ò Must have fuzzy dice hanging from rearview mirror.
Axles
ò Any ¢ ton and smaller axles or combination of ¢ ton and smaller axles OK.
ò This would mean Toyota mini truck, Land Cruiser, D44 and smaller, NO Dana 60 and larger.
ò No D60 or larger Knuckles.
ò CVs, Birfields, Ujoints all OK
ò Independent OK.
ò Any lockers, gears, shafts OK.
ò Must have 4 wheels minimum.
ò Any track width.
Steering
ò Any safe steering arrangement allowed. Hydro, mechanical all OK.
ò Rear steer allowed.
Brakes
ò Must have a brake at each wheel.
ò Cutting brakes OK.
Suspension
ò Unlimited suspensionù reactive, active, whatever. As long as it is safe, it should be legal.
ò Independent OK
ò Any wheelbase.
Weight
ò No weight limit.
We still have a lot of little filler to put in, but these are the main framework of rules. What do you all think? Any suggestions? Need some changes for clarity?"
taken from page 17.
there is still a lot of back and forth going on about limiting axles to 1/2 ton, keeping the atlas/stak kind of aftermarket cases out, etc. and also to keep some of the big dogs out, there are rules being proposed that you can only run F4 OR stock mod/unlimited/whatever, or you can only keep score on one, not both, etc.
Dallas, I think your input would be greatly appreciated over there, if you have a chance. most of the progress has been made since around page 15, so if you start there you can get the idea or where its at.
