About MADAZ Motorsport Racing
Madaz (Mad-az) Motorsport is a motorsport team that currently run an Improved Production Outright Over 2000cc Mazda RX7 (and 2000cc-3000cc class) race car as part of the IPRAWA (Improved Production Racing Association of Western Australia). Improved Production race cars are described under the Group 3J specifications of the CAMS motorsport manual. A reasonable amount of freedom is permitted with regards to modifications to the vehicle though the car must essentially remain as the original manufacturer intended.
With the now well established Improved Production Racing Association of W.A, Western Australia has an association that has the sole purpose of promoting and encourging the racing of Improved Production cars. In conjunction with the CAMS State Championships for Outright and Under 2000cc classes the IPRAWA also run a number of club championship classes for Improved Production Cars.
In the interests of supporting motorsport in WA, please visit and
support the following MADAZ Motorsport team sponsors
Wilkinson Suspension Center - 81 Beechboro Rd Bayswater, Perth,WA
The MADAZ Motorsport Series 2 Mazda RX7 Race Car Specifications :
Engine
Update Oct 2012 : In preparation for a new owner and after some further track time the engine was re-tuned on Rotomotion Engineers Dyno for optimum performance. Now producing 256.8rwhp @ 9,400rpm. The latest dyno report can be found here.
Update Feb 2011
: After a hard season and the IPRA nationals at Barbagallo, the engine was refreshed by Rotomotion Engineers. Apart from all new gaskets, seal springs and
o-rings a new main bearing was fitted. After a preliminary run-in period at Barbagallo raceway the engine was re-tuned on Rotomotion Engineers
Dyno. Early results saw 252rwhp @ 9,400rpm - and with the power curve showing no signs of flattening at this rpm-limit.
Update Sept 2010 : After the original RX4/5-based 13B block finally
had given its all, a new Cosmo/S6 RX7 based 13B block has been
procured. Now completed with Rotomotion custom
IPRA-compliant
bridge-porting, new Rotomotion custom phased S5 RX7 N/A rotors,
MFR 2mm carbon Apex Seals, completely new aluminum custom fabricated inlet manifold, upgraded oil
pump, remote 
oil filter, new larger custom air-box and ducted inlet,
the initial tune dyno run produced an impressive 250+rwhp @ 10,500rpm
with a very nice increase in torque across the entire rev-range over
the very best ever previous engine power-run.
Update May 2010 : The original RX4-based 13B block has now been
retired after a number of very successful years of racing. In
preparation for the 2010 IPRA Nationals at Barbagallo raceway a 1992
13B Cosmo-based block is being race prepared and built by Rotomotion
Engineers for the MadazMotorsport Mazda RX7. This update will require
the complete fabrication of a new inlet manifold and runners which will
allow the team to make some long desired adjustments to improve the
original design.
Update Feb 2009 : Engine fuel system upgraded to accomodate fuel
change to E85. Significant torque improvements across the working rev
range resulted from the conversion to E85.
Update - 01/03/2008 : During the "off" season the Madaz Motorsport
team and Rotomotion Engineers have been doing a lot of work on the
Mazda RX7 Race Car including upgrading the Quad Throttle Body EFI
system to an improved design. See the 2008 Dyno run listing
via the link below to see the improvement over the previous
configuration.
New 2008 Dyno Run is here. Red line is current power, blue line is previous dyno session power.
Update - 26/09/2006 : After a number of engine failures due to rotor and stationary bearing failures, the engine was rebuilt again using only RENESIS rotors, S8 RX7 ecccentric shaft and stationary gears. Engine has been much more reliable since this change with a number of successful race meetings completed with no signs of engine problems.
Update - 26/10/2005 : Engine now rebuilt with all RENESIS internals. This includes, rotors, eccentric shaft and stationary gears with a view to increasing the maximum available engine RPMs reliably.
Early Model Mazda RX4/5 13B 4-port Engine featuring Bridge Porting by Rotomotion Engineers. Assembled by Rotomotion and the first known Australian non-RENESIS 13B engine to run with RX8 high compression, lightweight rotors (engine run at Wannaroo Raceway 25/10/2003).
Previous Dyno Run reports 239.3rwHP (Dyno scan Here)
Engine Peripherals
Induction system uses custom specification twin dual (Quad) EFI Hardware Pro throttle bodies on a Rotomotion custom made alloy manifold (previously used a 51mm IDA webber).
Fuel injection and Timing are all controlled by the LTX-10S
Microtech ECU with X4 booster.
Exhaust is a Deere-Art designed, fabricated and fitted tuned equal-length system.
Ignition system provided by the Microtech ECU,coil packs and a crank-angle sensor.
Suspension
Front Suspension uses king spring coil-over KONI externally adjustable shocks with front camber adjustable plates. Whiteline adjustable front anti-roll bar.
Modified Series 4 Turbo lightweight strut-tower brace
Rear suspension is KONI adjustable shocks, factory Mazda re-sprung spings, nolathane-bushed lower trailing arms, Rotomotion custom roll-centre adjustable Mazda watts linkage, extra length upper control arms with factory bushes. Suspension tuning and fabrication work done by the Wilkinson Suspension Center and Rotomotion Engineers,WA.
Brakes
Front - BMW 300mm vented and slotted rotors clamped by Mazda Series
6 RX7 calipers.
Rear - Mazda Series 5 RX7 discs and Mazda Series 6 RX7 calipers.
Drive Train
Flywheel - light-weight (around 7lbs) alloy unit machined for use with Series 4 RX7 turbo gearbox.
Clutch - AP/Saschs twin-plate clutch.
Transmission - PPG 5 speed close-ratio, dog-box with 1:1 5th gear ratio housed in a Series 4 Turbo RX7 casing.
Diff - Rotomotion built MazdaSpeed LSD with Mazda Factory race gear set. Ratio depends upon circuit being raced at but varies from 4.77:1 to 5.1:1
Axels
Front - Series 2 RX7 stub axelsRear - Series 3 RX7 26 spline axels
Wheels
Rims - Performance Challengers 15x7 (maximum size permitted by IPRA Regulations)
Tyres - Yokohama A048R 205x50x15 (IPRA Control tyre)
Pictures
Please visit the links page for pictures of the MADAZ motorsport Mazda RX7 race car.