with one rotor it isnt linear
a 12a makes 100hp and 100ftlbs stock
but a single rotor makes like 38 hp

2 rotors and up are the only real choices

 

with 2rotors, it's smoother as well, you get a more constant power output, and it's more efficient.

but if you REALLY wanted o make one, get a 13b, remove the rear housing, and plate.

Shorten and fix the dowel bolts to the intermediate housing (which is now the end plate)

Machine the e-shaft end to accept a flywheel and counter-weight

calculate the EXACT weights needed for the front and rear counterweights, and get them machined

make an adaptor to fit a carb (easier than FI) and an exhaust - job done!!!

 

hmmm sounds almost doable.

wwilliam54 care to explain why 1 rotor will only make 38HP instead of 180HP as in a 2 or 3 rotor configuration?? if i take a 6 rotor and pull 3 rotors off i wouldnt have half the power?

 

would have thought it made around 58Bhp (12a stock is 114Bhp)

The added 1Bhp, takes into account the lessened rotational friction incurred from the extra rotor ancilliaries

 

so a single rotor with a small fast spooling turbo, and a well tuned ecu should not be putting out 38HP right? actually i think pettit was doing a 7b at some point...not sure how it turned out though

 

if you had a 12b TURBO that put out 76Bhp, I'd be shocked....

So if you half that number to get the power you'd get from a SINGLE rotor...You'd get 38Bhp

It would be easier to have it carb'd than injection if you were making this yourself, simply because the added expense of having to get a custom ECU to manage it (but a turbo would be nice)

Turbo FI would give around 70-80Bhp

 

there are dead power spots, in between the combustion cycles that are eliminated with a 2+ rotor setup
with 2 or more its pretty linear
same reason why 3 cylenders suck so much

btw 38hp is just the average number from a 12a with a dead rotor

 

but people are making 400-600HP in 2rotor FD's ? i cant imagine that if i took a rotor out (even with "dead" spots in power) that id make 80HP tops.... I would be running this off of an aftermarket ecu, nad some coustom turbo setup, it would most likely be fitted into a miata (but id have to figure out a way to get some of that weight towards the front of the car

 

why not just put a 2 rotor in the miata!

 

it has been done quite a bit...

but on ebay i saw a 3 rotor in one.... wasnt running though

 

if it has been done why would you put a one rotor in it....do you want less power with more problems

 

people are gooofy thats why..

 

Or they just want to be different..


rotormotor, those power figures were simply using some fairly bog-standard figures - with a bit of money you could easily get a couple of hundred horsies out of one

 

this thread should be called prozac cus it makes me happy

 

i dont know... less weight i suppose? with a 13b-rew in a miata you will die...... alot!!! actually come to think of it there are some v8 miatas pushing 300+ hp but there was tons of frame work needed. i dont know the 1 rotor was just an idea for fun.... thats what this threads all about but it would rock to have one since its so light

 

the miata would be like a motorcycle with 4 wheels

 

exactly! and if done right, would maintain its 50/50 weight distribution.

 

sounds good

 

but back to the original idea..... with the mini/multi rotors, but we make them with a convex shap at top but also wider at top so it can trap the oil and not burn it as much, the P.P. that only comes on at a certain RPM or when needed and also i never put it in here but for fuel econmies sake we could shut down the few end rotors and just let them spin and have a line which is connected to where the compression stroke normally takes places and use it as a forces induction, but this also means 3 seprate intakes 1 for the primary driving 2 for the shut off chambers and 3 for the P.P. ...... along with the possibilty of inclueding the spark plug on the rotor itself

 

oh and as for torque we could add the cvt tranny with a wide range of gear ratios since its like a cone shape the ratio could be endless

 

not sure about the passive rotor idea....

it would add unnecesary drag on the engine, and would take a couple of Bhp simply to turn it

like wwilliam54 said, you get about 38bhp from a 12a with a dead rotor. 55Bhp would be half of the total Bhp, and this shows just how much power is need to spin a rotor by itself

 

it would be for crusing speed when you dont need the extra horse, lots of V8s are doing it now... and the spinning of the rotor would be used for force induction on the other rotors, thus giving you more HP out of the fewer rotors spinning

 

the induction timing would be off, it would probably be sucking air out of the rotor rather than pushing it in

 

it would only lesson the overall power and be economical...and if you build this thing you are not woried about saveing money on gas. its all about power....grrrr...manly power. it would only build something like this if i was going to race it or something to cruse around town. imo

 

do u think you time a turbo?


no