I heard of a guy a while back making an e-shft for a 4 rotor out of 12A parts. Anyone heard this?

 

That's probably be Jeff Bruce. I think DMRH has his contact info.

 

I've seen and heard it.
http://www.autotechmotorsports.com/index.htm
These guys have the best method of doing 3 and 4 rotor conversions imho.
Engine sits lower and further back than even the stock 13b.

 

http://www.kiwi-re.com

 

Thanks

 

Thanks as well there was no pricing but I'm going to send them an email.

 

Jeff Bruce in New Zealand makes all these engines for all the people you have mentioned. He also built the sub 7 sec 3 rotor kit. He's a bad ***

 

Here is what Kiwi-RE told me.

Hi Curtis


The 4 rotor kit has the following:-
1:- Eccentric Shaft
2:- Front counter weight
3:- Rear counter weight
4:- 2 x Centre plates
5:- 2 x Stationary gears (modified)
6:- 2 x Stationary gear carriers
7:- 2 x Stationary gear external oiling mods
8:- Rear main nut
9:- 2 x eccentric shaft end caps
This kit is built with all new parts and also uses genuine Mazda parts.
The kit is $9500.00 (NZ) This is a kit only and you will need an
experienced
engine builder to organize the rest of the parts and engineering and
assemble of the 4 rotor engine.

Thank you
Kiwi-RE

$9500 NZ = $6700 US ruffly, I'm guessing it's about a $10,000 engine minimum. Kiwi-Re was super fast in their response and as you can see very helpfull, I'm working at gettting a price from autotech.

 

Dontcha need a stationary gear PER rotor? Seems there should be 4 stationary gears.

Also, shouldn't you need a third center plate? And what of the rotors and rotor housings? Or do you need to dismantle existing engines to do that? And if you do, then wouldn't you just need the E-shaft, as you'd have all the other parts from the two rotor engines?

 

I think you need one stock donor engine and the other parts needed ie the other 2 rotors and assories are what is included. In other words the kit still needs parts.

 

wow! thanks for that info curtis. that's pretty cool that they offer it in a kit.

 

fa show

 

are these 13b parts? also what about engine bolts? where do you find bolts long enough/durable enough to use for a 4rotor? sounds pretty interesting... but this is going to be one heavy *** motor, not to mention long. and then all the fabrication to get it into the car... why not just go with a 20b (unless you want the same power in n/a form). just sounds like even more of a $$ sinkhole than a 20b would be, with quite a few drawbacks. -heath

 

generally speaking, the people that are able to speak 4-rotor language have budgets that transcend the limitations of practicality. speaking for myself, i know if i had the coin to do a 26B project practicality wouldn't mean a damn.

 

Wow, that's pretty cheap. I've been planning a 4 rotor for a while, and have already talked to a local machine shop about building an eccentric. For that price, it seems almost pointless to spend about the same money locally for only a few of the key parts when I can get a "complete" kit for just a little more.

 

I'm looking at a peripheral port 20B N/A for my track car however a peripheral port 4 rotor sounds interesting. On the autotech website they say the 3 rotor and 4 rotor engines are the same length. A peripheral port 4 rotor would make one interesting engine. What EMS would you use to run it though?

 

Their 4 rotor is based off 12a housings and rotors which are not as wide as a 13b's, hence the smaller displacement (2.3 vs. 2.6) and being just slightly longer than a 13b.

 

coming back to life I hope...how about the oil pan. Would you need to fabicate one or can one use two 12a pans?

 

My guess is that they are using dry sump kit. you would need much higher oil flow and also by using dry sump you could stiffen up the engine by solid plate at the bottom instead of an oil pan.

 

hi
i am also going to build 4 rotors this winter.
is someone is looking to make the same lets buy parts together to get better pricing.
keep me informed!

are you sure there are 12A housings?
there should be 13B i guess.
i heard there are Mazdaspeed housings available already PPported.
they have better coolant passages, is it true?


i am going to make PP ported turbo 4 rotors.

thanks

 

Man, you guys got $20k just laying around somewhere?


-Ted

 

RETed, i dont think this is that much expensive..
$6500 for the KIWI kit, $3000 for the seals, $3000 for the housings and other stuff. Plus some of existed parts. I think $12-13k at most.
I also think price could be significantly less if there will be more than one buyer.

4 rotor group buy, sounds funny!

 

4 rotor group buy sounds great, I wont be ready for this untill this comming sumer, that's when I'll have time and all the money for the job. What parts are you going to use and from where are you getting them?

 

i havnt dig much yet, waiting for the responce fom Jeff and KIWI.
I am thinking about NRS ceramic seals, new 13B housings ( mazdaspeed PP ported?)
probably KIWI kit or maybe Jeff`s stuff
Rx8 rotors? probably 13B/20B rotors, i have plently of them in stock
electric coolant pump
still havnt desided about dry sump but most probably i will not go this way, just custom oil pan will work well with some oil pump upgrades


the questions is, how to balance 4 rotors assembly?

 

i think if they got a 10 person order they would crap themselves.