Sequential gearbox upgrade

Ross’ Mazda RX-3 street car has dipped into the 8-second zone previously, but in order to improve consistency and reliability, Ross has recently made the switch to a Samsonas 6-speed sequential gearbox. With no cutting of the factory trans tunnel, the box has been adapted using our new to market light weight billet CNC bell-housing which is manufactured in house. … Read More

Barra RX-8

Check out this unique conversion! A Ford Barra 4L engine in an RX-8. It’s a tight fit but it’s in there. We’ll update you when we fire this one up.

New Billet bellhousing

New from Promaz and ANDRA approved, our billet steel bell housing. No Need for ugly, bulky scatter shields. After five days of machining, this is our first one below, fitted to an RX-7 gearbox. Update September 2016 Our bellhousing adapted to a Samsonas 6-speed sequential gearbox. Starting with a steel block which weighed 169kg/372lb, the finished bellhousing weighs just 10 kg/22lb. Adapted to our … Read More

13B and 20B RX-8s

Although a very well balanced car, the Mazda RX8 always lacked a little go in the horsepower department compared to the older RX-7 it replaced. Peter’s 2009 GT spec street RX8 is a great example of tuner build done well. Rather than persist with the factory 13B 2-rotor Renesis engine the Promaz team has installed a 20B 3-rotor engine using … Read More

Sound of the 20B Rotary Engine ~ Mazda RX-7

Charles’ wild Mazda RX-7 tearing it up at the track! Power comes from a Promaz bridge ported 20B triple rotor engine and boosted by a Garrett GTX42R turbo running on methanol fuel and backed by a Jerico 5-speed gearbox. Easter Car Mania # 2 ~ Winton Motor Raceway, Australia April 4-6th 2015

Promaz Dyno Day

We had a great turnout at out recent dyno day. With trophies for rotary, 4, 6 and V8 powered cars it was Nigel’s VL Commodore turbo who took outright power for the day with a stunning 746kW dyno run. We would like to thank everyone who attended as well as Promaz team for their hard work on the day. Armando … Read More