Rotary engines
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From: peggs,ok
i have a friend with a rx7 (rotary expierimental 7) and he says theres not much to taking it apart but theres not many adjustable parts to it, u can like ad a cam to adjust the fuel air ratio, but they are vary reliable and fast
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From: On the road in Ohio
i had a rx-7greatcars, different but fun....and very reliable.....i also had the wagon version , engine rubber seals were worn out , and it would lose compression, so i would just pour about 2 tablespoons of brake fluid in it , seals would swell up, andrun like new,I could go for 3000 + miles before doing it again,,
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Joined: May 2004
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From: Melbourne, Aus
Originally Posted by nick88f150
So the new mazdas (RX7/8 i think) have rotary engines in them now...no pistons. What do you guys think of these? I tend to be a bit skeptical.
RX-7's have always had rotaries...
And they are (IMHO) very impressive.
My wifes car, series VI RX-7 SP - with few mods - makes 320 RWHP.
Am hoping for around 500RWHP shortly with a turbo change, some porting, and some injectors, much to her disgust
The only problem with them is fuel consumption, and the fact they have to have lots of boost to make power - looking at a dyno graph, it almost equally corresponds with the boost graph...
They are very reliable, and sooo smooth...
In drag racing in Australia few cars can touch rotaries.
You have to have a serious supercharged big block to beat them, as they will run 8's quite cheaply, I have even see a twin rotor run high 7's, thats even before we get into triple and quad rotors - the 787B which won the Le Mans in 91 ran a quad rotor, and the Mazda Cosmo used a triple rotor.
Anyhow, to sum up a very impressive motor, and kudos go to Mazda for perserving with the engine, and to Ford for funding it!!!
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From: fremont ohio
Shoot I didn't know they've been around so long. I knew about Wankel, but i didn't know Mazda has used them for so long. Why are these engines not used in more vehicles, just because of mileage?
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From: Melbourne, Aus
Originally Posted by nick88f150
Shoot I didn't know they've been around so long. I knew about Wankel, but i didn't know Mazda has used them for so long. Why are these engines not used in more vehicles, just because of mileage?
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isn't the new RX-8 rated for even less? By the way I am failing to see what is so efficient about an engine that gets horrid mpg...please enlighten me. By the way don't they also consume more oil?
Last edited by Fordtastic; Nov 14, 2004 at 01:16 AM.
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I know a guy in Oklahoma that built a rotary powered rock crawler that is very impressive. I cant believe how small those engines are, about the size of a large Briggs&Stratton engine. From what I'm told, rotarys are extremely hard to over rev due to the fact there are no pistons,rods and such that have to change directions. I wheeled with that guy last spring-he runs through a glasspack in his exhaust. When I was in front of him the noise was very annoying-when I was behind him it was unbearable. I have a set of lightweight axles that are very low geared and I'd like to build a buggy type thing using a royary.
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From: North Dakota
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From: Davenport, IA
how they work explained:
http://www.rotaryengineillustrated.com/index.html
efficient meaning the way they are built - not fuel consumption - alot less moving parts in a Wankle rotory than a piston engine.
http://www.rotaryengineillustrated.com/index.html
efficient meaning the way they are built - not fuel consumption - alot less moving parts in a Wankle rotory than a piston engine.