Grand-AM GT Rx-8 20B three rotor
 

Read this article in mazda fuel magazine and on mazda new site. here it is for those that have not seen it

My question would becould this engine be mass produced in either the '09 or '10 rx8 or the mythical creature called the mazdaspeed rx8? and if so what kind ponies does it put out? plus i cant even emagine what kind of gas mileage this thing would get. Any input would be appreciated and remember this has been put here for constructive criticism

MAZDASPEED MOTORSPORTS AND SPEEDSOURCE ANNOUNCE FULL SEASON 2007 GRAND-AM GT



-- Rotary Powered Mazda RX-8 to Challenge for Championship --

IRVINE, Calif., - MAZDASPEED Motorsports Development today announced the continuation of its partnership with Florida-based SpeedSource, Inc. in the Grand American Road Racing Association Rolex Series GT-class. The SpeedSource Grand Am GT Mazda RX-8 is based on a tube-frame chassis jointly developed by SpeedSource and Riley Technologies, and powered by Mazda’s three-rotor 20B Renesis rotary engine.


The SpeedSource team ran select races in 2006 in preparation for this years challenge for the championship. SpeedSource, Inc team owner Sylvain Tremblay commented that, “Having spent 2006 contesting a limited schedule and focusing mainly on testing, we go into 2007 with a competitive car that can run at the front, at all the tracks. The team has spent considerable time making the car better and easier to work on. The package proved that it could win last year, now we just have to execute. With the full support of Mazda behind us, we are ready for a full assault on the GT championship.”


SpeedSource has over a decade of Mazda racing experience including multiple Grand-Am Cup ST championships with the RX-8. SpeedSource won both the driver and team championships in 2004, followed by the 2005 driver, team, and manufacturer championships. The 2007 team drivers will be Sylvain Tremblay and Nick Ham, with Randy Pobst and David Haskell joining the team for the season-opening Rolex 24 Hours of Daytona.


The 20B three-rotor engine is the cornerstone of Mazda’s Grand Am GT RX-8 program, and based on the engine used in the RX-8 street car. With its compact size and light weight, the rotary engine brings with it a vast history in sprint and endurance racing. Revving to over 9,000 rpm, the distinctive 20B rotary engine sounds like no other engine on the grid. “The Mazda rotary has a great history in road racing, especially at the 24 Hours of Daytona where RX-7s won the GTU class every year from 1979 through 1993. We are very optimistic about our chances in 2007,” said Steve Sanders, MAZDASPEED Motorsports Competition Manager. In addition, MAZDASPEED Motorsports Development will offer a lucrative contingency awards program of over $100,000 for the entire season for teams running RX-8s in Grand-Am GT.

Complete turnkey vehicles, including chassis, engine, suspension and data acquisition, can be purchased directly from SpeedSource. Prospective competitors may contact MAZDASPEED Motorsports Development at 800-435-2508, and SpeedSource, Inc at 954-578-7071 for more details.

The Grand Am season will begin January 27 th with the Rolex 24 at Daytona, and conclude September 15 th at Miller Motorsports Park in Utah. The series includes a stop on May 17 th-20 th at Mazda Raceway Laguna Seca for the U.S. Sports Car Invitational.

On any given weekend, there are more Mazdas on the road-race tracks of America than any other brand of vehicle. At the track, you’ll see MX-5 Miata, RX-8, MAZDA3, MAZDA6, RX-7 and other Mazda models competing, because every Mazda has the Soul of a Sports Car. In fact, the fastest growing road-racing class in the U.S. is the SCCA’s Spec Miata class, with nearly 1,800 first- and second-generation Miatas tearing up America’s racetracks, making it the most-raced production car in the world. Mazda’s involvement in motorsports even extends to its relationship with Mazda Raceway Laguna Seca, one of the world’s premier road-racing circuits.


Headquartered in Irvine, Calif., Mazda North American Operations oversees the sales, marketing, parts and customer service support of Mazda vehicles in the United States, Canada and Mexico through nearly 900 dealers. Operations in Canada are managed by Mazda Canada, Inc., located in Ontario, Canada, and in Mexico by Mazda Motor de Mexico in Mexico City.



My question would becould this engine be mass produced in either the '09 or '10 rx8 or the mythical creature called the mazdaspeed rx8? and if so what kind ponies does it put out? plus i cant even emagine what kind of gas mileage this thing would get. Any input would be appreciated and remember this has been put here for constructive criticism

The 20b was a production engine. It was used in the Cosmo, which never made it to the US. The odds of a peripheral port 3 rotor motor making it into production are slim as the fuel economy would be abysmal (think way worse than the rx8) and it would be tough to meet emissions with the p-ports.

A factory forced induction renesis would be a better option. That will never happen either.

Considering Mazda outsourced R&D work to Racing Beat to run supercharged engines, and Racing Beat has confirmed this numerous times, "never" is too strong a term.

Perhaps, but I have given up hope. I love my 8 but would be tripping overmyself to trade it in for a factory rx8 fi car if one existed.

I'd love to see a production car with a 3000rpm idle!

Was the LMP2 car a 20b too? I heard that a couple years ago at the july 4th ALMS race at lime rock. Sound like a moto GP bike but louder. In the pits it sounded like it had at LEAST a 3k idle, I'd suspect more. Its funny to think that a modern grand prix car idles around where we redline.

they do not use the cosmo engine in that rx8. they CLAIM to use a renesis 3 rotor.....whcih implies its a side port exhaust...whcih the cosmo's 3 rotor was not.....

and they only gave us a hint at what it makes....and i quote...... "400 plus horespower"

i remember it being on a straight against an M3 and the announcer said the mazda had the advantage bc of the hp and i was like wtf are they smoking...o wait, that must be a 20b.....bc no NA renesis would have an advantage over an M3!!!!!

and then the rx8 blew the doors off the M3......



thats all i got

any idea on what the torque would be on the 20b

My friend works for the Farnbacher Loles Porsche team and he has seen dyno sheets for the Grand-Am RX-8 3-Rotor...I forget exactly what he said it was, but it was over 500 hp, maybe even 550ish.

The 911's hardly stand a chance...they are running a production based chassis, vs. the tube-frame of the Mazdas...plus the Porsches are only making about 450 hp in Grand-Am. So the Mazdas are lighter, stiffer, more powerful, and better balanced...do the math

The three-rotor 20B-REW was only used in the 1990-1995 Eunos Cosmo. It was the world's first volume production twin-turbo setup featured in both 13B-REW & 20B-REW form. It displaced 1962 cc (three 654 cc rotors) and used around 10psi of turbo pressure to produce 300 hp and 300 ft.lb.

Can I get one? Paint it black. My three year old already has a 5 point belt with the LATCH system, all I have to do is upgrade MY seat.

:) NH

They may be running a production base chassis, but it is a racing Porsche chassis. The Porsches seem to do all right for a car that is mostly all sorted straight from the factory. They could go out and build their own tube frame car if they wanted.

did I read it right? Renesis 20b ???????

3 Rotor Renesis ? 3 Rotor with side exhaust port ?

The engine that they are running is Cosmo based and is both peripheral intake and exhaust. Their rotor housings are production based with the peripheral mods provided by Racing Beat. The motor makes similar hp to the Porsches with less usable torque especially at lower revs, hence the reason the sanctioning body has permitted them to run a slightly lighter chassis; which by the way, has the drawback of running slightly smaller tires.

Speed Source are truly top level professionals and proper Ambassadors for the sport and Mazda. Sponsoring them is money well spent!

Paul.

as far as I've read....it's a renesis nearly the same as in our rx-8's, but with a third rotor added. it's naturally aspirated. I don't know how much HP it makes, but I know the regulations for the KONI series require between 380 and 450...so...somewhere in there. I'm sure it gets wonderfully terrible mpg :-)

Hi,

https://www.rx8club.com/general-automotive-49/does-updated-mazda-three-rotor-design-exist-114424/

check the link in post #7 for some specifics.

also i wonder if that throttle body speedsource is using is the one that someone saw on the 'net as a upgraded TB for the 8... any thoughts?

i saw them on tv, the guy in the pit said they ran great, but ate up fuel to the point where they have to pit more than the competition :(

3 days ago i stood in the place where the carbon fiber work was done for the body:D:

Thanks. Wow, 300 hp and 300 ft lb. That would be very very sweet. :)