Quote:
95jersey said:
What kind of mods are allowed in the series? Is it a street stock series or can you reposition suspension and use aftermarket brakes? Is the suspension a mandated cup kit or wide open? motor? tell me more
\
Its the 944 Challenge in Australia. Its a one make, series, where the cars are all pretty much the same...and it reduces the costs.
All of the race series details are in here:
http://www.944challenge.com/All the 944s in the 944 Challenge must comply with the Group 2B Technical Regulations from CAMS (the governing motor sport authority in Australia.) I'll copy and paste them below:
Bodywork and Dimensions
3.1 Seam welding of the body shell is not permitted.
3.2 Rear bumper bar or a fibreglass replica must be retained.
3.3 Front bumper/fascia must be either standard, or a fibreglass replica of that fitted to the
944 turbo model. Front air dams may not be added.
3.4 The rear spoiler must be either standard, or a fibreglass replica thereof. Additional rear
spoilers / wings must not be added.
3.5 The rear hatch must be the retained standard glass component. Additionally, rear hatch
restraints must be fitted to each side of the hatch, either in addition to, or replacing, the
standard latch mechanism to prevent the hatch opening more than 250mm.
3.6 Body Width
The body width is to be a maximum of 1740 mm, as measured above the centre line of
the front and rear axles. Wheel arches may not be flared.
3.7 Minimum Racing Weight 1100 kg
3.8 Front Lights If the standard pop-up headlights are removed, they must be replaced by
either 2 or 4 rectangular lights mounted in the driving light recesses of the front bumper.
Dimensions of the lights Minimum width 125mm
Minimum height 55mm
Minimum power 55W
3.9 Rain Lights: A 20W globe must be fitted into both of the rear combination lamps in the
position normally used for fog lamps. The extra globes must illuminate in conjunction with
the parking lights
4 Engine
The complete engine assembly, including all systems necessary for engine function, must
remain standard and unmodified, save as specified in 4.1 to 4.10 below. The cylinder
block must bear one of the following casting designations:
M44.01 to M44.10, M44.40, M44.50 to M44.52
4.1 Blueprinting and balancing of components is permitted.
4.2 Removal of unused ancillary components mounted on the engine is permitted.
4.3 The fuel rail may be replaced by one of free design.
4.4 Alteration of valve seat geometry is permitted.
Removal of piston material to increase valve clearance is permitted.
The maximum throat diameter of the inlet valve seat insert shall be 39.80mm.
Page 3 of 5 Issue Date: 19/01/08
The maximum throat diameter of the exhaust valve seat insert shall be 34.90mm.
The thickness of the cylinder head ("A" dimension) is not restricted.
4.5 Crankshaft: Cross-drilling permitted only to aid lubrication.
4.6 Camshaft The camshaft may be either type 155.05 or 155.09. The keys and keyways
of the standard camshaft timing sprocket may be modified provided camshaft timing
remains standard. The timing belt cover may be removed or replaced by a custom made
part.
4.7 Exhaust pipe: The exhaust is free from the first flange joint.
4.8 The following items may be replaced by mechanically and functionally identical substitute
components.
Pistons and rings Valves
Bearings Gaskets
Valve springs Bolts and fasteners
Piston pins
4.9 The following specifications shall apply to engines.
Bore 100.50 mm Maximum
Stroke 78.9 mm +- 0.1
Compression Ratio 11.5:1 Maximum
4.10 Throttle body: The throttle cam profile may be modified.
4.11 Engine Control Unit (ECU). The controlled ECU is the Wolf 3D 944 Challenge unit,
available from Advanced Engine Management Systems. The ECU and sensors supplied
with the Wolf engine management system must be used. The maximum allowable engine
RPM is 6500. It is the entrant's responsibility to demonstrate compliance with the RPM
limit as requested.
From 01/01/08, the ECU is unlocked, and the crank angle may be detected in any
position using sensors supplied.
4.12 The following minimum weights shall apply:
Crankshaft (bare) 23.5 kg
Connecting rod/screws/cap/nuts 820 g
Inlet valve 96 g
Exhaust valve 94 g
Clutch assembly including fasteners 10.2 kg
Piston/rings/piston pin/clips 710 g
4.13 The ø70mm tube with air temp sensor (supplied with the Wolf ECU) must replace the air
flow meter and be installed in the same position. The Engine Air Intake is free upstream
of ø70mm tube.
5 Piping and Fuel Tanks
No additional restrictions
6 Cooling System
6.2 Radiator: Custom radiators may be used subject to the following restrictions:
The width and height must be no greater than the standard radiator
The thickness of the core shall be no greater than 55mm
6.2 Ducting: Must not protrude below the front bumper and must be through existing body
openings only, which includes driving light recesses.
Page 4 of 5 Issue Date: 19/01/08
7. Transmission to the Wheels
7.1 Gearbox and Final Drive: The gearbox/final drive assembly shall be Porsche 944 Type
016J or 016K (Identification Code 5Y or 5S or ASG only), in unmodified form. Only the
following ratios are permitted.
1st 3.6000:1
2nd 2.1250:1
3rd 1.4583:1
4th 1.0714:1
5th* 0.8286:1 (016J) or 0.7297:1 (016K)
Rev 3.5000:1
*Either 5th gear ratio may be installed.
7.2 Differential: Limited slip or locked differentials are not permitted.
7.3 Final Drive Ratio: The only permitted ratio is 3.8890:1
7.4 Gear linkages: The original gear selector lever and its pivot point must be retained.
7.5 Cooling of lubricants: No additional cooling of gearbox/final drive/differential lubricant is
permitted.
7.6 Tailshaft and Driveshafts: These must be standard components.
7.7 Bearings, gaskets and seals may be replaced by non genuine components provided that
they must be mechanically and functionally identical substitutes.
8 Suspension and Steering
8.1 Front Suspension: The control arm inner pivot/mounting position may not be relocated.
Stub axles and hubs must remain standard.
8.2 Rear Suspension: Control arms must be standard, but may be of either factory alloy
or steel variants. The damper mounting point and spring seat on the steel arms may be
modified to match those of the alloy arm. The control arm and spring plate pivot/mounting
points must remain as standard. The spring plate must remain standard.
8.3 Suspension Dampers: Canister adjustable shock absorbers are not permitted.
8.4 Suspension Bushes: Elastomeric suspension bushes may be replaced with mechanically
identical elastomeric bushes. The functional volume of the elastomer component must be
at least 90% of the equivalent volume of the original bushing.
8.5 MacPherson strut top mounts: Must be as standard.
8.6 Suspension brace: No additional suspension brace between the suspension top
mounts is allowed.
8.7 Anti-sway bars: The anti-sway bars may not be adjustable by the driver seated in the
normal driving position.
8.8 Wheel Alignment: The maximum permitted front wheel castor angle is 3*.
8.9 Wheel track: Maximum Front 1500mm
Maximum Rear 1480mm
(See CAMS Manual for measurement method)
Wheelbase: Maximum 2400 mm
Page 5 of 5 Issue Date: 19/01/08
9.0 Brakes
9.1 The entire braking system must be retained in unmodified form, except as specified in 9.2
to 9.4 below
9.2 Freedom is granted in relation to brake lines caliper seals, hoses and fluid. A brake
proportioning valve, which must not be adjustable from the normal driving position, may
be fitted into the rear brake line.
9.3 Brake pads: Only Specified brake pads may be used both front and rear. These must be
supplied by "aPorschaPart", Race Brake Compound No 6.
9.4 Brake disks: Brake Disks may be subjected to slotting and/or cross drilling.
10. Wheels and Tyres
10.1 Wheel size: The maximum rim size is 15" x 8" (front and rear).
10.2 Tyres: Only Yokohama A048R 225/50R15 tyres must be used.
Removal of tread material by Buffing and/or Grooving is not permitted
11. Cockpit and Driver's Compartment
11.1 Pedals: The pedal box, and the position of the pivot points in the pedal box must remain
as standard.
11.2 Console: Either the standard console over the transmission tunnel, or a fibreglass replica
thereof must be retained.
12. Safety Structures
12.1 The Safety Cage must not extend outside the cockpit.
13. Fuel
13.1 The fuel to be used in competition is JFP102 Racing Unleaded purchased at the event.
No additives of any kind are permitted.
But it is way faster than my previous track car the MX5 (or Miata in USA).
