spottedfrog

Okay I wasn't really too int the 20B 1st gen idea, up front cost and up-front weight distribution. Not to mention the actual install. Then I saw HITmans 3 rotor 13B http://www.hitman.hm/rx7.htm

That got me thinking. His 13B is lighter and smaller than the 20B yet makes comparable power.
Wouldn't a 3 rotor 12A be even smaller and lighter? Would it not rev faster and still have low down torque, albeit not as much as the 20B or 13B 3 rotor but the size and weight benefits should balance out. Now mate it to a 6-speed transmission.
Other advantages would be build at your own pace not as high initial cost. Any one done this. Ideas on the subject?

Pedestrian X

i dont know anyone that has done it but i like the idea..

spottedfrog

Maybe I should have posted this in the 3 rotor forum. I was thinking first gen. though. Any idea what power it would make, better or worse than tourbo?

toxic_d

should be nice an torquey... I was at one point considering doing a 4 rotor based on the 13b but the area in which I live lacks anyone with any machining experties.

May have to consider this three rotor 12a based engine idea.

Kyle

gamble302

i already got a price quote on a 3 rotor 12a kit with a new shaft and some toher stuff. id copy and paste outta the email but our email server went down and im waitin for him to gimme my old ones back.
i think it was 4500 aus for just a kit, where you supply your own housings etc. and then where do you find an intake system?

i was hopin it wouldd be cheap and easy, and i dont think it is going to be either :'(

hornbm

yeah really, anytime you are trying to make something that you dont even know exists, it ain't gonna be cheap.

12abridgeport

i was thinking of doing that also but it probably is going to be more expesive than just buying a turbo for that 12a.

zyounker

I know of someone makeing a 3-rotor /w 10A housings.. Pretty much all custom.. it will be a 1.5liter to match certain racing rules..


Oh, and i believe it will be close to a 13B in length.


-Zach

enigma32

gamble302, Didja get that email yet?

Where exactly does one purchase the parts from? I assume that the main thing of importance is the e-shaft, and that it needs to be fabricated?

I would love to do a 3-rotor 12A in my 1st gen... Perhaps now's the time to start planning so I can actually do it in a few years?

REVHED

What sort of porting? If built properly that thing will rev live crazy.

rotary emotions

It has been done guys, check Hurley in the UK.
http://www.hurleyrotary.com/
Once the engine is together, it cannot be to hard to get the intake etc done. But it's just not worth it price-wise, I think. Nevertheless, it would be really cool.

enigma32

Yes, there's a few places that have done it., but none are very specific, and I don't feel like calling and asking until I'm closer to doing it

However, considering the price they show on their site (and assuming that it's for a 13B, since it doesn't say) I don't think a 3-rotor 12A would be significantly worse in price than a TII conversion (of course, that's assuming I could find someplace here in the US so I don't have to pay freight charges )... and would likely take less effort due to the smaller block size (except for actually finding the parts)

And just think of the coolness factor of having a high-horsepower, high-torque, custom 3r-12A under the hood =)

I think I'll waltz on over to the Other Rotary forum and see what they have to say over there...

Edit: Decided to go with the performance/mod forum instead...

deeman111

was it just me or did someone else see the "900 BHP Hurley Six Rotor Engine - Seeing is Believing " at the bottom of that link.... if thats real and not a joke OMG i want one... ok new charaty..... everyone donate money for me to buy one and put it in my 7 If you donate ill send you a photo and a piece of rubber chipped off the tarmac. heheheh

well im allowed to dream arent i????
James

rotary emotions

It IS real. I've seen some pics of it, but I haven't got a clue if it actually ever ran, and for how long. A six rotor shaft would be under some serious stress I'd reckon.
But basicly, you could make as many configurations as you want (can afford). From single rotor (like NSU Wankel Spider) over 2 rotor (most common) and three rotor (Mercedes, several Mazda engines) or four rotor (Mazda, Mercedes-Benz, some one-offs) or even 6 rotors like Hurley. Once you managed to built a more then two rotor engine, you can built as many as you want. The only problem with more then two rotors is the E-shaft (in pieces) and the stationary gears (need modified center housings). Once you have that for a three rotor, you can combine pieces, and just get the correct E-shaft for whatever you want (can afford). How about a 10 rotor?