I was originally thinking of getting a non-running RX8 to do an LSX swap, but I've fallen in love with the 4-rotor. I found a '04 RX8 that doesn't run for $1500 that appears to be in decent interior/exterior condition and a second donor RX8 engine for $100. Both engines don't run, but are they salvageable? Worse case
>inb4 just buy running donor engines/parts
Too expensive, and where's the fun in that?
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Lmao if you are posting on Veeky Forums asking dumb ass questions such as this, you really think you can do a 4 rotor build? And no, stacking housing and rotors together is not like Legos at all
How do you propose you build a 4 rotor?
Gonna call PPRE?
How much power do you want?
Do you know what youre doing?
Rx8s are ugly and 4 rotors are expensive as shut
Chances are you'll blow a 2 rotor since you're this stupid, just stick to shitboxes with piston engines
I hope you have 40k+ laying around
What's not modular?
Don't you have to cut the frame to even fit the thing?
Bad Bad Bad idea OP
Tell me where youre gonna get an ecentric shaft and housing bolts
Britney Spears.
That's all I think of when I see an RX8.
might as well be welding together two ls1s to make a v16, the difficulty is about the same
Nope not modular
You would have an easier time just making it electric.
I know absolutely nothing about rotary engines, but that thing looks like a fucking cake roll
>how do you propose to build a rotary engine
They're modular as fuck. You can literally stack them like pic related. You have long screws running through the length of the engine. They're surprisingly simple in design.
>gonna call PPRE
not going to modify the block and rotors with performance components at this point. I'm going to go NA stock 4 rotor until I get out of college and have the funds to do so.
>how much power do you want
I'll be sticking to however much I can get NA for now. Might turbo later on.
>do you know what you're doing
I know it inside and out. Don't think I haven't been researching this for months.
You didn't think I was going to pay someone to do it, did you?
you don't have to cut the frame to LS swap it and that's not too far off in side
>where are you going to get the eccentric shaft
literally cut and join the two 90 degrees out of phase
>bolts?
They're just really long bolts.
again, see pic related
easier? yes. cheaper? an electric motor with around the same performance of a 2 rotor Wankel costs twice as much, not including a $3500 controller, parts to get all the AC/steering/heater working, severly overpriced (they can charge what they want because it's still an extremely small niche market) mounting hardware, and a set of batteries costs as much as a running RX8 with extremely low mileage
Holy fucking fuck youve got to go back to the insane asylum.
No one can be this fucking stupid
>cut and join
>just really long bolts
MY
FUCKING
SIDES
plus some maching and working out math to couterbalance the rotors properly.
>just really long bolts
If you couldn't make one of these from a bolt from home depot, you're mentally challenged.
>You didn't think I was going to pay someone to do it, did you?
No, I didn't. it would cost 40k to do it yourself. would love to hear how you are going to set up an ecu for anything over a 3 rotor. the fact that you haven't even mentioned electronics or the ecu tells me you haven't been researching for months like you say.
Thats not how it works
Jokes on you, I'm an electrical engineering student. I know a thing or two about electronics ;)
Lmao dude you have zero idea
The fact you have to ask here for information shows it
You can't just stack rotors together
It is a LOT OF WORK trying to balance the eccentric shaft, and you DON'T just weld them together
You say you know what you're doing inside and out because you looked at pictures for a few months
Any experience working with rotaries at all? Any?
Just get a 10' length of metric all-thread and you'll be fine.
Lmao if you think you can use that weak piece of shit to hold four housings together...
I hope you also just happen to be one of the best subframe, engine mount, etc. fabricators in the country
yeah, you're fucking retarded
interesting how you've been researching for months yet you've decided to come to an anime image board to ask what to do while getting so many fundamental things wrong
OP, I will personally deliver the 13B from my FD to you while wearing assless chaps and a gimp mask if you are able to come up with a workable answer to the eccentric shaft problem that does not rely on calling PPRE.
Please, never think about even buying a car with a 2-rotor engine. You have demonstrated yourself to be too fucking stupid to be allowed within 50 feet of a rotary engine.
>yeah, you're fucking retarded
>Jokes on you I was only pretending
y u mad tho?
I asked here just to get an opinion. That's all.
>you can't just stack rotors together
but oddly enough you can. look at the parts and how it's assembled.
"no experience" he says
>not knowing how to read readily available information and datasheets
>not being able to understand one of the least complex ICEs in existence
If that's what you're into, sure go ahead, but this better not turn into some gay porno, haha. I can think of several ways actually.
I believe in you OP, do it and keep us posted :^)
I said "workable," meaning one that works.
If they're anything like your previous suggestions, they won't.
> Long screws
You're done. Don't talk to me. Don"t even look at me.
So youve never ever touched a rotary and your 'information' comes from looking at just pictures? thanks for confirming that youre a retarded busriding nocar shit
Do it, I fucking dare you.
my DD is a camry. buses are for niggers.
Exactly how the 3-rotor 20B does it
Exactly how do you plan to fabricate that?
Or do you have the $10k+ to just buy the thing?
Lmao these are my favorite kinds of threads...
It never ceases to amaze me that some people seem to have no understanding that engines, despite being relatively simple in theory, are incredibly complicated in practice.
If building an engine where as simple as hacking up pieces and welding them together haphazardly then why in the world would machine shops exist?
The tolerances in question here are incredibly high. You probably won't be able to get the thing to fit together with your nonsense method, and even if you do I can assure you it will vibrate itself to pieces in a minute tops.
If you must have a 4 rotor there is a company that makes them. But they machine out the crank that they paid a team of engineers to design. They don't glue two cranks together...
Honestly m8 this project would be on the other side of 50K.
40 is what the engines cost. And your going to pay it eventually because you need the crank they make.
You know what, OP? Go for it.
Most of the advice in this thread has been reasonable, which is an uncommon sight nowadays, and knowledgeable. There's a reason why not everyone is fabricatig 4-rotor eccentric shafts, there's a reason why Haltech sold a specific version of the Sprint 500 for rotary engines. But, then again, what are reasons for an electrical engineer as smart and decided as you are?
Rage your dreams, OP, don't listen to the naysayers. Don't worry, it's a project that won't spiral out of control in terms of costs and complexity and you won't be stuck with two broken Mazda's while not having money to pay for college.
Keep us updated!
lmao i love these posts in this threads like this
No experience is damn right.
The 13B-MSP cannot be rebuilt under most circumstances. The MSP's housings are made of a harder alloy than the ones of the older 13B's. After 20-30k miles, the RX-8's housings are permanently mated to the one set of seals.
Also, I'm guessing your "donor" junk engines are the 6-port models. Those won't work. Not to mention you would need three mid-plates and two end-plates, of which your donors won't provide. But that won't matter as both engines are blown.
Have fun with non-graded bolts from Home Depot. They'll stretch and you'll blow coolant gaskets after before 500mi...If they don't shear while torquing them down.
The RX-8's eccentric shaft is hardened steel-alloy. Almost a tool steel. You cannot cut it without a top-notch machine shop. You cannot weld it with traditional methods. Friction welding may be your only option. But again, you need access to some of the best and most expensive equipment in the world.
Oh, and it'll cost over 40k in just parts.
Go buy a Corvette instead.
Shut your negative, hater poop-face and let OP do what he wants. After all, he's an electric engineering student that has done tons of research on the subject!
Yeah OP super simple
nopistons.com
Yeah OP just go buy all the parts first before you research it.
It will TOTALLY just work and you can just lego rotors together, that's why there are so many 4 rotor engine in the world. Its just that easy but people only want normal 13b motors. But make sure you buy all the parts first before doing anything else.
You stupid shitposting tripfag. Didn't you read the thread? He's been researching this for months!
He should definitely get started right away.
why not 6 rotors?
can you even get those rotaries up to 10k rpm with a long eccentric shaft? I assume the eccentric shaft would have to be perfectly balanced.
good bait
you all got btfo