The Heart of Rotary Performance!

RX-8 Performance Parts Now Available!


RotaryNews Media

Ads by Google

Would you be interested in purchasing a book on the history and development of the General Motors two rotor engine (RC2-206).
Total votes: 30

Who's online
There are currently 0 users and 95 guests online.

Mazda 16X Rotor Dimensions and Technical Details
Submitted by ekrampitzjr on Tuesday, September 22, 2009 - 7:02pm

Exclusive to
by Edwin Krampitz, Jr. (ekrampitzjr)

Mazda has been coy about what the 16X rotor dimensions will be. Based on a bunch of detective work from the Mazda website and a recent US patent application, along with a lot of algebra and number crunching, I believe I have determined them:

Rotor radius (R) = 120 mm
Equidistance (a) = 2 mm

R' (R-prime) = R + a = 122 mm
Rotor eccentricity (e) = 18 mm
Rotor width (B or W) = 70 mm

K ratio = R/e = 6.67:1 (using R, not R')

Displacement using R' as Mazda (technically incorrectly) does:
798.8 cc/rotor, 1598 cc/engine

Major axis = 280 mm; minor axis = 208 mm

My confidence in the accuracy of these dimensions is very high, based on information in the patent application in particular. Read on for the technical details explaining how I determined these numbers....

[ 3 comments | read more ]

PAC Performance Mazda6 is the Fastest Rotary in the World! 6.75@201mph
Submitted by Berny Herrera on Friday, September 18, 2009 - 3:44pm

September in Sydney, beautiful blue skies, warm weather and great conditions for Drag Racing. This would provide the back-drop to one of the greatest and most justly deserved performances provided by an Australian team in Drag Racing history in this country!!!

The three day weekend would start with the awards dinner on the Thursday night at the Rooty Hill RSL, where PAC customer Damien McKern would proudly accept his award as National Champion for Super Compact in it's inaugural year!!

[ 1 comment | read more ]

Mazda Delivers Two Premacy Hydrogen RE Hybrid Vehicles to Hiroshima Government Authorities
Submitted by Dan Mazzella on Thursday, September 17, 2009 - 10:54am

Mazda Motor Corporation today delivered one Mazda Premacy Hydrogen RE Hybrid each to the City of Hiroshima and Hiroshima Prefecture government authorities in western Japan. The Premacy Hydrogen RE Hybrid is Mazda’s latest hydrogen rotary engine (RE) vehicle that uses hydrogen as a fuel and features a unique hybrid system. Including the first lease of a Premacy Hydrogen RE Hybrid to the Iwatani Corporation in May 2009, Mazda has now delivered three hydrogen hybrid vehicles to fleet customers to date. The City of Hiroshima and Hiroshima Prefecture each had a rotary engine RX-8 Hydrogen RE vehicle delivered in April 2006, making this the second hydrogen-fueled model that has been handed over to the local government authorities.

[ login or register to post comments | read more ]

Team Sahlen to Campain 2 Mazda RX-8s in the 2010 ROLEX Grand Am Series
Submitted by Dan Mazzella on Thursday, September 10, 2009 - 2:20pm

Will Nonnamaker wrote in to tell us that Mazdaspeed has announced that Team Sahlen will be campaigning 2 Mazda RX-8s in the 2010 ROLEX Grand American Sports Car Series. Team Sahlen will be a fielding a full contingent of drivers who have contributed to Mazda Championships through the years. For the #43 RX-8, the father and son duo of Joe & Wayne Nonnamaker will co-driver together, and Joe Sahlen & Will Nonnamaker will be partnered in the #42 RX-8.

[ login or register to post comments | read more ]

Mazda RX-792P at Monterey Historics, Piloted by Patric Dempsey
Submitted by Dan Mazzella on Wednesday, August 19, 2009 - 11:40am

Every year, the Monterey Historics bring classic race cars from around the world to the famous Mazda Raceway Laguna Seca. This year, the RX-792P 4 Rotor was piloted by Mazda staff, and Actor Race Car driver Patric Dempsey. Weldon Munsey (Mazda Dealer Affairs Manager) qualified 10th out of 28th in a pack that included a ton of Porsche 962 and 956s on Friday. Patrick Dempsey ran it in Saturday morning warm-up and in the race. He finished 4th. Thanks to reader Allan Rodgers, he was the first to send in this story, even before Mazda Staff had a chance to email us!

[ login or register to post comments ]

SpeedSource FXDD Mazda RX-8 Victorious at The Glen
Submitted by Berny Herrera on Monday, August 17, 2009 - 3:06pm

08/10/2009 - The SpeedSource team returned to the historic Watkins Glen International track to run a 2-hour sprint race on the short course. With only 4 races remaining in the season, the #70 SpeedSource Castrol Syntec Mazda RX-8 looked to gain valuable points in the GT Class Championship alongside team car #69 SpeedSource FXDD Mazda RX-8. The shortened race format demanded absolute perfection and concentration from all competitors as heavy race traffic and shortened pit windows complicated the normal racing procedures that crews were used to. As night fell over Watkins Glen, the duo of Emil Assentato and Jeff Segal took the GT Class win in the #69 SpeedSource FXDD Mazda RX-8.

[ 2 comments | read more ]

10th Anniversary of + Rumors for 2009 Tokyo Auto Show
Submitted by Dan Mazzella on Monday, August 17, 2009 - 8:07am

10 years ago, rumors about a concept Mazda Rotary appeared in magazines and the still young internet; they were reaching a fever pitch. Most magazines had Mazda unveiling a next generation RX-7, a 2 seat sports car. A few sources claimed Mazda would unveil a 4 door sports sedan, like the Lexus IS series. At the show, Mazda did introduce a new concept, but the RX-Evolv was wilder than anyone had speculated, a 4 door sports car. Over the course of the next 4 years, the RX-Evolv evolved into the RX-8, and revived the rotary community in the US and around the world...

[ 5 comments | read more ]

SpeedSource Castrol Syntec MazdaSpeed RX-8 Secures 2nd Place Finish @ Barber Motorsport Park
Submitted by Berny Herrera on Wednesday, July 22, 2009 - 5:59pm

07/21/2009 - Round 8 of the Rolex Sports Car Series brought the SpeedSource Castrol Syntec Mazda RX-8 to Barber Motorsports Park. Located in sunny Birmingham, Alabama, beautiful landscaping surrounds the twisting and flowing 2.3 mile road course. Being able to manage traffic effectively at this track, which is already difficult to pass at, is critical to success. After a race that demanded near perfect performances from both drivers and pit crew, the SpeedSource Castrol Syntec Mazda RX-8 claimed a 2nd place finish in the GT Class.

[ 1 comment | read more ]

SpeedSource Castrol Syntec MazdaSpeed RX-8 Scores 2nd Place Finish @ Daytona
Submitted by Berny Herrera on Thursday, July 16, 2009 - 12:10am

07/07/2009 - Leading the SpeedSource team into the second half of the Rolex Sports Car Series schedule was a return to Daytona International Speedway for the Brumos Porsche 250. This year's event was particularly special as it served as the precursor to the NASCAR Coke-Zero 400 on Independence Day. While enduring blistering heat and managing a weekend schedule which was compacted into just one day, the #70 SpeedSource Castrol Syntec Mazda RX-8 earned a Second Place finish.

[ 1 comment | read more ]

Bergenholtz Racing Nitto Mazda RX-8 3-Rotor ready to make Formula D debut
Submitted by Berny Herrera on Friday, June 5, 2009 - 2:25pm

June 1, 2009 - Bergenholtz Racing and Justin Pawlak are ready to make their Formula D debut at Wall, New Jersey. Bergenholtz Racing just completed two days of testing this past weekend at Balcony and The Oval in Willow Springs. Technical testing was conducted by the team for the optimum setup for Formula D’s Wall, New Jersey event. “The Mazda RX8 is completely insane. The 3-rotor makes so much power and sounds so sick. The NT05’s are sticking so hard that we actually have too much traction. I can’t wait to rock the house for all the Mazda fans in New Jersey.” Said Justin Pawlak drift pilot of Bergenholtz Racing.

[ 2 comments | read more ]

Find us on Facebook

User login

Atkins Rotary
Automotive, Aviation, and Marine Applications of Rotary Engines
Phone 253.848.7776
Fax 253.848.3284

Google Search

Follow us on Twitter

Forum topics

Top nodes

Who's new

home | events | forum | search | archive
Copyright © 2005 Media Group LLC, a Nevada Corporation