If a 20b is the same thing as a 13b, but with an extra rotar, that means if I have 2 13b's i can build a 3 or maybe even a 4 rotor motor?

Ill just run it on an stand alone ecu of some type?

OR AM I JUST CRAZY :smirk:

12a = 1.2 liters

13b = 1.3 liters

20b = 2.0 liters



i hope im right, please feel free to correct me if im wrong.



good luck building that motor. i see that happening real soon

Yea, the 3 rotor and 4 rotor motors have been done before.. I guess you could make one yourself.. but alot of things come into play. The main thing that comes to mind is housing, but not sure.. https://www.nopistons.com/forums/pub...IR#>/dunno.gif

That's correct. :bigthumg:

If you have to ask. what these engines are, you shouldn't even think about building one.



There are a substantial amount of things you will need to fabricate to get this to work. Its not as easy as stacking rotor housings. You are also going to have to use a 20b eccentric shaft or if you make a 4 rotor one will have to be fabricated.



To do a 20b swap RIGHT it will cost you anywhere from $10,000 to $40,000.



A four rotor can easily pass the $100,000 mark.

Yep.. you're probably better off with a 2nd gen engine.. https://www.nopistons.com/forums/pub...#>/biggrin.png

13b 3 rotor engines are used in Austrailia but you need to start with getting a custom e-shaft then take it from there.The hitman uses a 13b 3 rotor race engine in his.Just do a search on the Hitman.His first gen rocks.

Heres a 3 rotor 13b.These aren't cheap.Race 13b SA

Im almost certain that it will not cost me 10 000 or 40 000.(ue a bit crazy) But the 2 engins will cost not even 1000$.So ill go with a motec for about what 1500$. Then all that is left is custom fbrs...

Instead of going and see mazda speed to ask for sumtin custum ill just go see my freindly neighborhood machinest..

I don't even need to put labour into this, because ill do everything myself.(mountin the engine dat is.) The only bitch dat comes to mind is the essentric shaft(which i think i can track one down from a cosmo),and the............... A think dat's it.

Wow your telling people who have done this swap that theyre full of **** and it doesnt cost that much?



You said that, without knowing what a 20b is?

True a 13b 3 rotor won't cost that much.But did you look at the link I posted?You need some 12a parts and a custom E-Shaft.I wouldn't be trusting a nieghborhood machinest to build a e-shaft.I would get one of those proven to run ones sent up from austrailia.They're dollars are worth about the same amount as our cdn$ are.Just read the build-up before you blow money on something that might not last long.A machinest I would trust building the lower intake and turbo manifold.but no a critical part like a e-shaft.Then you still need the upper intake from a 20B if you stay inject which is your best bet seeing as a carb setup for that engine is worth more than efi.Then you also need custom mounts and a standalone system. can we say..... https://www.nopistons.com/forums/pub...IR#>/bling.gif :bigok: