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ROTARY ZOOM ZOOM

Rx7_Black

 

Mazda-rx7-01



Mazda is synonymous with the rotary engine!

 

Mazda-rx7-06

  The Mazda RX7 Turbo




The Mazda
RX7 Rotary (Non-Turbo) first gained prominence on the race tracks of
Australia driven by Alan Moffatt, a Canadian most feared by
his competition when driving a Ford Mustang or an Australian
Falcon.

The History

and Technology of the Rotary Engine


Mazda has always stayed in touch
with its buyers and has been a leader in innovation. In 1978 the
first generation 12A powered RX-7 took the world by storm,
exceeding production expectations and causing traffic jams at
the dealerships.  The rotary engine had found its
true home and Mazda had found the heart of the sports car lover. The RX-7
achieved immediate success with “Car of the Year” awards across the globe and
major racing victories at events such as SPA and Daytona. The RX-7 made its own
name on the Australian circuit with victory in the Australian touring car
championships of 1983 and 84. A 2nd outright at the 1983 Bathurst 1000 during
the height of the V8 era proved just how formidable the rotary could be, giving
cause to the many traditional racers changing their V8 cars for rotary power.


10A RE

10A RE

The History and
Technology of the Rotary Engine

Ever since the first
shipment of (10A) R-100 coupes back in 1969, Australian enthusiasts have
been in love with this remarkable engine and the cars they have powered.
The (12A) RX-2 achieved a ‘giant killer’ reputation at a time when the
V8 was unchallenged on Australian roads. The (12A) RX-3 followed,
proving very popular both on and off the race track. One of many racing
at that time caused more than a worried look after placing fifth
outright in the 1975 Bathurst 1000. A new level of refinement was
created with the (13B) RX-4 and virtually no other car could match its
performance and luxury package at the same price. In 1976, the (13B)
RX-5 gave Australians an even newer level of luxury in a coupe with
performance to match its looks.

 



12A

 

12A RE

13B
13B RE

mazda_Rx7_03

 

A new fuel injected
6 port version of the race proven 13B rotary became standard
equipment for the second generation or series IV RX-7 of 1986.
Moving up market to become a more civilised sports car, the 13B
rotary was given a turbo option boasting 137 kW by employing a
newly developed twin scroll turbocharger to take full advantage
of the engine’s strong exhaust pulsing. The turbo was obviously
the production ‘rocket’ factory had intended it to be and was
now competing against the established marquees on the world
market. The RX-7 was voted “The sports car to own for the
everyday driver” by much of the world’s motoring press. Refining
an already excellent product, the 1989 RX-7 kept Mazda ahead of
the pack of ever emerging sports cars. With 146 Kw on tap from
the totally re-developed 13B turbo engine, RX-7 sales again
surged ahead of the field. Notable publicity from local Mazda
racer Gary Waldon winning numerous production car titles
fulfilled the ‘win on Sunday sell on Monday’ cliche.

 

mazda_Rx7_04

 


13B-DEI
          
13B-Turbo

13B-DEI
          
13B-Turbo
 

In 1991 Mazda
achieved arguably the ultimate accolade for the rotary engine,
victory at the Le Mans 24 Hour. It was a first for a Japanese
car manufacturer and a first for the rotary engine. The Mazda
787B prototype sports car took on the world’s best for 24
grueling hours to finish all three entered cars in 1st, 6th and
8th position. Producing over 700 hp the R26B quad rotor engine
was peripherally ported and incorporated steeples variable
induction plus three plugs per rotor (instead of the usual two).
It is through the
severity of racing in events such as these that the current
generation rotary engine has evolved.

 


787B Sports Car

787B Sports
Racer

 

When designing
the third generation RX-7,Mazda’s engineers knew what they
wanted – a no compromise sports car that could take on the world
and win. To achieve this the world’s best engine had to be made
better. A 20 per cent jump in power from the series V RX-7
engine to 176 kW with a weight reduction to 1310 kg had the new
series VI RX-7 establish itself as the up market leader. The
world’s best selling sports car had now become the best ‘value
for money’ sports car. Mazda chose to race the RX-7 from 1992
until 1995 under production car rules winning the prestigious
Bathurst 12 hour endurance race each time whilst toppling big
buck challenges from various Porsche models and other marquees.
Recently a demonstration of the RX-7’s rotary power and
amazingly smooth aerodynamics where shown when a three rotor 13G
powered version tamed the 1000 hp under its bonnet to set a new
class speed record of just under 400kmh on the salt flats of
Utah U.S.A.
The twin turbo 13B
engine in the series VII version RX-7 was then improved yet
again. With power output now standing at 194 kW, it gave
unprecedented performance coupled with the ultra smooth power
delivery that makes the rotary engine legendary. Mazda wouldn’t
have it any other way.

 


RX-7 Sports Car

Mazda RX-7

 

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  1. October 15, 2015    

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