The last time we featured Jason’s Mazda RX3 street car it was powered by a 13B rotary turbo engine and rolled on huge 19x12in wheels. At the time Jason commented that he always wanted a 3rotor. Well fast forward a number of years later and the refinished monster Simmons wheels remain, but under the bonnet is where our interest lies.

The larger displacement 20B 3rotor bridge ported engine was built by Promaz and features a Billetpro sump, water pump and engine brace. A Garrett GTX42 turbo is aided by a Turbosmart wastegate and blowoffvalve all governed by a MicroTech LT16c computer running on pump unleaded fuel. Another big change was in the gearbox department. The Supra hpattern was ditched in favour of a very cool Samsonas 6speed sequential unit, making this one very desirable street Mazda.

Mazda RX3 sedan
Promaz 20B 3rotor bridgeport engine
BilletPro sump, engine brace/mounts & water pump
Garrett GTX42 turbo, full exhaust
MicroTech LT16c computer, pump 98ron unleaded
Turbosmart wastegate & BOV
Samsonas 6speed sequential gearbox, 9in diff
Simmons 19x6.5in & 19x12in dished wheels
Built & tuned by Promaz Automotive
http://www.promaz.com.au

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