From all i've read, the 12a seems to be the more reliable rotary, but are there any 3 rotors out there built on 12a parts? I think that would be awesome.

 

there is a 4-rotor based on the 12a.

 

the 12a is reliable because the vast majority of them arent boosted.

but what would you call it? 18a?

 

yeah i would believe so, but i think there already is an engine called the 18a

 

No, it would be the 18BA (badass)

 

the Scoot 4 rotor is 12A based.

 

So whats it take to build one? Obviously a custom eccentric shaft, and longer studs (or are they bolts, i'm kinda a newb) and probably 2 or 3 carbs?

 

A 3 rotor 12a based motor would be a 17a and a 4 rotor would be a 23a. There is a company that makes custom eccentric shafts for them.
http://autotechmotorsports.com/r_and_d.htm


+1

 

I know with the stock 20b the two intermediate plates are not the same. What would you use as a second intermediate plate for a 12a-based 3-rotor? You need a gear to mesh with the middle rotor somehow...

Jon

 

(Welcome to 1988)

 

I can really tell by the pic, efi or carb? Looks awesome though.

 

Maybe you could use an intermediate housing or two from a 20B, it doesn't seem like they would care since it doesn't affect the rotor housings. Then again, looks like some one figured it out in 1988, way before the 20B.

 

If I remember correctly you can't use the 20B front-center (fat) plate because all S5+ stuff has the coolant seals on the iron rather than the rotor housing.

 

You really can't tell? Those are SU carbs... 3 of 'em

 

didn't Hitman build one ages ago as well?

 

XR4Turbo, I live like not to far down the road from you in Streetman on Richland Chambers Lake. We should get together and hang out with our 7's! I havent seen another FB in awhile other than my two.

 

hahah did anyone notice the fusible links...god i hate those things.

 

could be just two 12a center irons one capped off lol

 

1995 Three Rotor-Triple Turbo Bonneville Engine=880HP
2000 Three Rotor- Single Turbo Special Project Engine=900HP
Info straight out of Racing Beat Tech Manual
sgieldon
steve

 

That was 13B based.

 

Correct, Scoot's 4 rotor is 12a based. He also uses 2 Jspec Power FCs to control the engine. A friend of mine visited his shop in Japan and got a ride. He said it was incredible. Scoot drove it like he stole it and my friend said that the exhaust note coming off the buildings as they blew by was incredible!!

 

yeah, the one in the yellow car. i don't k now why, but i thought he had built a 12A-based one as well. oh well, i guess the ol' brain is failing me. time for some ginko biloba.

 

YMMV. In the past 25 years--and nearly as many RX-7s--they never gave me any problems.

Yes those are SU's (HIF6)

 

Eh...well...i dont exactly have one, but by august, I should have one. I want the sound really badly.

 

So what would an NA 12A 3 rotor produce....horsepower wise?