> Any 4 cylinder, single cam,2 valves per cylinder up to 2400 cc.
> Mass produced production car heads only.
> Wet sump oil system only.
> Two barrel carburetors, gasoline and natural aspiration only. No fuel injection, turbo blowers or nitro.
> Max. engine set back to be 20" from center of front wheels to front of engine block.
> Weight of car with driver after feature to be : Ford 2300 cc, hydraulic lifter engine -1700 lbs.
> All other .85 lbs per cc
Zetec Rules (Approved)
1.1999 – 2004 ZX3 1989 cc. No SVT engines or parts.
2.Short block, Stock and unaltered.
3.Crank, rods, piston assembly to be run as delivered from the factory. No lightening or balancing.
4.Oiling system may be modified for circle track racing (pan, pickup tube, remote filter, oil cooler).
5.No dry sump oil systems.
6.Water pump impeller may be replaced opposite direction vane.
7.Cylinder head, stock valves no oversized valves, no stainless or titanium valves.
8.Stock springs, retainers and buckets only.
9.Approved camshaft. Crane part # 223-0012 drop in cam or stock cam. (see spec sheet) http://www.cranecams.com/
10.No porting of the cylinder head. Only match porting allowed ¼” for gasket surface.
11.Machining of the cylinder head to increase compression to a max. 10.5 – 1.
12.Adjustable cam gears may be used to fine tune cam timing.
13.Cylinder head may not be relieved for lobe tip clearance.
14.2 barrel Holley carburetor only.
15. Any intake manifold. (Possible spec intake being developed)
16.Absolutely no fuel injection, turbo, nitrous superchargers.
17.Any Ignition system allowed.
18.Rev limiter to max. of 7200 RPM. To be set and sealed by club.
19.Must run on pump gas.
The Ford Focus engine objectives is to create a reliable, competitive and cost effective alternative (not replace) to the current all out race engine.
The Pro 4 Modified Club (as a group) reserves the right to change the specs of the Ford Focus motor at any time. The cost associated to the changes is the responsibility of the driver not the club.
Any driver has the right to have the motor inspected at any time. The driver requesting the inspection must cover the cost of oil and gaskets at the time of the inspection. The cost will be set at $300.00 in the event the motor is determined legal the money is released to the motor owner. In the event the motor is found illegal the money will be returned to the driver requesting the inspection. Inspection will be preformed by the club (as a group) at a predetermined time and location (including at the track).
Transmissions
> Mass production O.E.M transmissions only.
> Min. 2 forward gears and reverse.
Chassis
> Wheel base 105" max., 94" min.
> Track width: 78" max. to outside of tire bulge. to be measured with no go gauge at bottom of tire.
> Wheels - 13" x 10" steel racing wheels only.
> Cage - 1 1/2" x .095" min., three drivers side bars min.
> Max left side weight 60%
> No remote adjustable suspension.
Rear Suspension
> One straight axle only. One coil over per wheel. No I.R.S.
Front Suspension
> Dual arm independent suspension only. One coil over per wheel.
Tires
> Hoosier F-15, F-25, F-35 tires only.
Body
> Open front wheels completely exposed.
> Lexan .125" min. windshields mandatory.
> Roof optional.
> Max. body width 72"
> Rear deck height 35" max.
> Rear spoiler height 41" max. and no wider than the body. Must be laxan if above 35".
> No Wings
> Center of front wheels to nose max. 40"
> Center of back wheels to back max. 40", not including spoiler
> Nose piece and front bumper no wider than inside of front tires.
> Nerf bars or body must be within 1" of outside of tire.
> Numbers must be neat and clear on both sides of car.
Safety
> Approved 5 point harness with 3" belts min.
> Snell approved helmet.
> Approved fire suit, shoes and gloves.
> Approved arm restraint mandatory for open roof cars.
1999 – 2004 ZX3 1989 cc. No SVT engines or parts.
