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WireD

Oh lord have mercy...!

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Så kan man jo selvfølgelig ta en diskusjon om slagvolum på en Wankel. I bilsport blir en slik regnet som 2 liter

 

Joda, det er sant, men den er, forbrenningsrom-messig sett en 1,3 liter. To rom a 650ccm som døttes bangsuppe og luft i, komprimeres og antennes. Det er mange måter å se det på. Man kan se 6 tennings-sykluser per 360graders veiv(eksenteraksling) rotasjon og si at det er tilsvarende en V/R6 også..

Designen er bare sånn sett rimelig effekt-effektiv m.t.p tap i bevegelige deler osv. Nettopp pga. wankelens enestående evne til å ta unna STORE mengder luft/suppe og antenne det, så er den en gøyal liten race-motor. En annen måte å begrense wankelen til å kunne race i 1,3litersdivisjoner er å strupe inntak(porting) og suppetilførsel.

 

UANSETT, lyden er sinnsvak, og ytelser er imponerende..!

Holdbarheten er også latterlig god, nettopp pga. at det er en N/A motor.

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Jeg retta skrivefeilen din.

og alike vell så er dei 100 ganger lettere enn stempel motorer og trimme og skru fra hverandre....

må sei at mazda Furaien hørres mye bedre ut :)

Edited by tommy1033

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Jada, Wankel er morsomt å høre på, og lett å dra ut hester av. Men så mye mer fordeler er det egentlig ikke. Holdbarheten er mildt sagt dårlig, Mazda RX8 slik den ble levert ny fra din lokale dealer kunne faktisk gå hele 150 000 km uten å åpne motoren......... Ække bra det vettu. Dessuten er de tørste, noe som heller ikke er bra i dagens samfunn

Og dreimoment eksisterer knapt under 4000 o/min, så spesiellt lettkjørt er det ikke

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Jada, Wankel er morsomt å høre på, og lett å dra ut hester av. Men så mye mer fordeler er det egentlig ikke. Holdbarheten er mildt sagt dårlig, Mazda RX8 slik den ble levert ny fra din lokale dealer kunne faktisk gå hele 150 000 km uten å åpne motoren......... Ække bra det vettu. Dessuten er de tørste, noe som heller ikke er bra i dagens samfunn

Og dreimoment eksisterer knapt under 4000 o/min, så spesiellt lettkjørt er det ikke

150 000 km er jo Mye uten å ha motoren fra hverandre :P har du ein som er godt trimma så har du flaks viss den holer 20 000 før den går i teina :P

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samme gamle dårlige ryktet som er helt feil....

 

Her er noen ord fra en som har racet motorene i mange år, Howard Coleman:

"

"

Back in 83-89 when i was racing rotaries versus factory backed piston engines in SCCA GT3 class one of the most significant aspects of the rotary was that it was bullet proof. The $20,000 four valve Toyota engines that were the primary competition were running cams that were so radical they had about 4 thou piston to valve clearance so as to make enough hp to run w the rotary. Over-rev 500 rpm on a shift and you had a bushel basket of shrapnel for your $20,000.

 

My Roger Mandeville or Daryl Drummond motors ran from 7000 minimum to 10,000 max for the entire 35 minute race. i remember at the 83 Runoffs at Road Atlanta asking Roger after qualifying if he thought we should throw in a fresh motor. The motor in the car had run 12 National races, plus two days of practice and two days of Runoffs qualifying... Roger asked if the motor hot started O K and i answered in the affirmative. He laughed and said that if we liked working we could change it but it wouldn't add another hp.

 

Try that w a piston engine.... the valve stems would be loosey goosey leaking oil into the combustion chamber, the valve springs would be shot, the rod bolts would be stretching etc etc.

 

I ran 72 National races, 5 Road Atlanta Runoffs and had one blown motor.

 

The circumstance of my one misfortune was after the first day of qualifying at the Runoffs I was fourth. I asked Daryl if we might put one more tooth (Speedway Eng quick change rear end) in the overall gear ratio for Q2. We were pulling 10,000 at the bottom of the hill after the long back straight… the change would add an additional 400 rpm in 5th. Daryl said it would be 50/50 the motor would live as it had been pulling hard from the keyhole. I gave it a shot and the motor lost a seal at 10,400. Unlike a piston motor, most of it was salvageable.

 

Even when wounded, racing rotaries just keep on humming. i remember seeing Chris Dembs at the (approx) 82 Runoffs pouring oil down his Weber carb to get his rotary started and he blew off a very strong field...

 

Perhaps the most demonstrative example of rotary reliability was in the 24 Hours of Daytona. During the 80s Mazda racked up a huge number of wins in GTU and GTO over Porsche.

 

At the end of the 24 hours all the Mazda racers would make a point of bringing their cars into the pits and letting the engines idle while they leisurely extricated themselves. The engines (huge bridgeports or peripherals) would just brap brap away like they had been on a cruise.

 

Bullet Proof.

 

The piston engine cars still running after 24 hours would idle at about 5000 rpm. They were total junk. I use the J word literally. After a 24 hour race most piston engines are torn down and almost all moving parts are discarded or sold for pennies down the food chain.

 

Rotaries ruled the 24 Hours in the 80s. All from a shortblock that is approx 13 inches by 13 inches by 13 inches... w no rods to bend, no valves to crunch, no cams to screw with no windage problems in the crankcase....

 

So what happened to the FD rotary?

 

Turbos happened.

"

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Eller utvikling...... ;)

 

 

Vil da ikke si det?

 

Er en bråte wankelbaserte team i usa, australia, new zealand og japan som herjer helt i toppen i forskjellige GT-klasser osv med enten RX7ene sine eller en wankelplatform i rør-ramme o.l

De kjører som oftest 20Bmotorene i PP-konfigurasjon med 450-500 hjulhester.

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