4 rotor NA 3rd Gen RX-7

[exciv2000]

The car runs mid 10s and has 590hp @ 8500 rpm with NO boost & NO N2O!

http://student.lssu.edu/~ujones/4rotorfd.mpg
http://webhost.karlz.nzco.net/atomnet/fourre.mpg
http://onionz.com/albums/afterburne...rotor_video.mpg

[oMekone]

thats off the hook, never knew there wasa 4 rotor motor.

[tsiah]

they have made 5 rotor engines....as far as I know
they have to custom make the block and crank (is it called a crank in the rotory engines?) but yea...crzyness
that car is hardcore

[Skaterkid]

Mazda made some experimental 4 rotors, but I hear you can make your own, the eccentric shaft needs to be custom or something.

[foxxof]

tsiah i think its the output shaft.

[myshtern]

so wait

there are 4 engines in that one engine?

[stu]

No, it's just like adding displacement by adding cylinders.

[myshtern]

so there are 4 spinning rotors?

are they contained in the same... thingy

[stu]

Not sure on that.They are part of the same thingy, so not like just stuffing two 4 bangers into the bay next to each other. So, actually, I guess the answer is "yes," as far as I know; which isn't much.

[Skaterkid]

tsiah i think its the output shaft.
No the eccentric shaft, the rotary's "crankshaft". You need to extend it for all four rotors rather than three or two.

And yes they are all contained in the same housing...sort of. Rotaries are built like lego sets. Each chamber can be added to another. Each rotor is like an individual piston, and has its own housing which acts as a cylinder.

[damian9669]

No the eccentric shaft, the rotary's "crankshaft". You need to extend it for all four rotors rather than three or two.

And yes they are all contained in the same housing...sort of. Rotaries are built like lego sets. Each chamber can be added to another. Each rotor is like an individual piston, and has its own housing which acts as a cylinder.
you are correct.Most likely what most people do is take two rotary engines 12 a I believe and join the housings and custom make an eccentric shaft that is able to support all 4 rotors.So really what they do is take the two eccentric shaft out of the two rotor engines and have a custom made eccentric shaft that looks like the two shaft joined into one.Hope that made some sense.Theres another 4 rotor rx7 made by a japanese company called Scoot.Search the net and im sure youll find it.

[foxxof]

i think eccentric shaft is the same as output shaft... but i could be wrong. dont they call it an eccentric shaft because it has the 'eccentric' lobes? ok yea lego is good analogy. you can also think of it how they built the engine for the bugatti w12. they kinda morphed the engines together.
ill go find a diagram

[foxxof]

this is one rotor from an rx7
http://static.howstuffworks.com/gif/rotary-engine-intro.jpg

here is the eccentric shaft or output shaft (i checked)
http://static.howstuffworks.com/gif/rotary-engine-output.jpg

in this picture you can see the plates are bound together kind of in series
http://www.sasracing.com/engine3.jpg

hope that helps some