ProjectR13B

iTrader: (1)

first off, no im not trying to put one in my car.

I was just wondering some of the specs on the engine. like how high did it redline, how much power did it produce, and anything else on the engine.

thanks

RacerXtreme7

iTrader: (2)

I found 10 freakin pages with more then 10 links per page all pertanant to the engine your reffering to on Google.com. Simple "MAZDA 26b" was all I typed.


~Mike...........

RacerXtreme7

iTrader: (2)

The most prominent 4-rotor engine from Mazda was used exclusively for various Mazda-built GT cars (including the 767 and 787B) in replacement of the older 13J. In 1991 this engine in a 787B became the first from outside the U.S. or Western Europe and the first (and so far only) car with a rotary engine to win outright the 24 hours of Le Mans race. It displaced 2622 cc and built 700 hp (522 kW) at 9000RPM. The engine design originates as a single 13B with an additional rotor and housing added at each end and with continually variable geometry intakes. The R26B's engine block can be purchased at retail from Mazdaspeed, but no internal parts are available to the general public.

RacerXtreme7

iTrader: (2)

R26B was lighter, smaller and more economical than its processor. The R26B Wankel engine benefited from a variable intake system, optimizing air intake for certain vehicle speeds. Two periscope-shaped air intakes were mounted ahead of the rear wing. Each intake assembly was mated to a telescoping-pulley system which was able to vary the height of the protruding periscopes through a stroke of approximately six inches. The extension and retraction of the intakes was governed by the car's ECU computer depending on vehicle speed. At high speed, the intakes were retracted to decrease drag and smooth airflow over the rear wing, and to reduce the restrictions on the air flow into the engine. At lower speeds, the intakes were extended in order to provide maximum positive pressure to the charge entering the rotors. Also, it benefited from an extra spark plug on each rotor from the 767’s two, making the car more economical and improving combustion. An oil cooler was mounted at the front and the car’s aerodynamics was improved at the sides and top of the bodywork. Like all previous engine, it featured Peripheral Porting in order to achieve the high levels of power from a naturally aspirated motor.

Engine speed (RPM's) were deliberately kept low for longevity under the extreme stresses incurred during a 24-hour endurance race. The 787 was reported to have a redline around 9000rpm. However, interviews with Mazda's 787 race engineers revealed that the power of the quad-rotor increased dramatically above 9000rpm. One engineer stated that the car could develop more than 930hp with a redline around 10,500rpm. Engineers also commented that during the post-race inspection and tear-down of the quad-rotor engine they discovered that all aspects of the engine were still in excellent condition and could have run another 24-hour race.

RacerXtreme7

iTrader: (2)

BTW, the very last line there is a testiment to ceramic apex seals.

I'm not trying to be a dick, but from the time you posted this, I found your post, googled it, and pasted all the info inless then 10 minutes. The interweb is your friend


~Mike.............

j9fd3s

iTrader: (3)

we had a chance to talk to koby himself in 2001 at the monterey historics, and the wear on the 787b's apex seals, after 24hours was something like .0004" or basically the error tolerance of the measureing devices.

as far as the apex seals were/are concerned the engine could have gone another 24hours....

also another little bit of trivia, the videos you see of koby revving the enigne at sevenstock, its going from idle to redline, and the intake trumpets can keep up.

DHeart197

I have an write up about the R26b engine . PM your email if you want it.

Kenku

Minor thing... no you can't buy them from Mazdaspeed. I forget the exact numbers, but there's less than a dozen in working condition, and Downing owns something like half of them.

Stix37867

iTrader: (1)

But it's not impossible to make one. The hardest part is the e-shaft which i believe you can custom order through some Australian makers. I'll try to find the website.

felix_is_alive

i was reading on this yesterday and found out that autotech has a 4 rotor (26B) based on the internals of the 13B, well there still working on this , are there anymore companies doing this?
Wow 950hp on NA .....damn !......makes you kinda wonder huh

Stix37867

iTrader: (1)

http://cp_www.tripod.com/rotary/pg03.htm

Here's a good site with a bunch of pics.

DHeart197

Another good site here.

61620B

Here are some pictures of the crank up close.

Kenku

Yeah, there's people who make 4-rotors out of production 12A or 13B bits. Which isn't the same as the R26B except in concept and capacity.

vest_racing

KIWI-RE has a 4 rotor kit...

http://www.kiwi-re.com/wwd_showroom_cat10_2.php

felix_is_alive

ok now ,....say you do get the 4-rotor kit from some of these guys , and manage to assemble this thing whithout breaking anything ,....what ECU could control this ??

zoomman

lol sped freakn 10k on just a crankshaft and balencers...or for 15k buy one. the link is on craigs page.

vest_racing

Thats no problem..
Microtech Lt12s can handel 4 rotors...

felix_is_alive

interesting......i never knew that

mirabile

Lets do it Felix

DHeart197

its 6K in US dollars at AMV Racing

NZ_87_TURBO

yes but not very well.

lawton rotorsports has a Mazda SP20 hatch with a 26B turbo ( T60 i think ) its limited to 1300hp at 20psi as its keeps breaking the drive train, to date it has never made it down the track on a full power pass.

felix_is_alive

yeah there was a thread on that car here somewhere , i also saw somewhere that i think it was autotech , whaere making a 4 rotor FD ,did that ever get completed?

NZ_87_TURBO

theres a 26bPP road legal FD in NZ plate FOURRE does 9 sec passes

M104-AMG

iTrader: (8)

Here are some 4-rotors from the Daytona Historics in Nov. 2006.

These are Kudzu Downing cars (4-rotors) with 6-inch exhaust cannisters. . .

:-) neil

Some pics from the Daytona Historics in Nov. 2006.

These are Kudzu Downing cars (4-rotors) with 6-inch exhaust cannisters. . .

Check out the brake ducts (see last pic!)

:-) neil