I am working on designing a scratch built tubular frame Mid Rear Mounted car.
I intend on building a P-Port 13B four rotor engine, I have the e-shaft already designed and caded, I have all of the port positions and sizes also designed. I Intend on making it about as simple as possible.
So I would like to know what you guy's think I will require for a rear end and Transmission and especially clutch that will be able to handle the 690 Hp at 11500 Rpm. It needs to be an Independant Rear end, not solid.

What do you guy's think?

 

Mustang Cobra IRS or Virper Dana 66 (think its 66) IRS should be able to take damn near what ever you throw at it.

As for tranny.... thats a whole other ball of wax.

BC

 

There are a couple transmissions out there that might be what you need. I will try and gets some info to you when I get a chance. I had to solve a similar problem as I am stuck fitting a 20B in the back of a ferrari. Some stuff should just be left undone

-S-

 

Porsche GTx transaxle.

Why not just put one of these together?
http://www.factoryfive.com/table/ffr...TM/GTMkit.html
I will likely be starting one with an (if it fits) na p-port 4 rotor whenever my vert gets done.

 

Daytona Prototype Transaxle.

 

Hey That is a good link RX-Heven... looks tempting I ordered their brochure and dvd soo what it compares to.
But the transmission Is still up for debate it seems like that porshe rear end will work nicely.

13bt rx3 the word prototype sounds pricey...

 

Sounds like a great project! I'm curious about your E-shaft design. How did you account for the increase in radial and transverse forces? Did you add a bearing to the center of the housing? Also, what are you making it out of? I know that the equations are really messy but did you consider shaft fatigue and failure analysis on that? I'd hate to see you spent 10K on building this thing to just have it fail after a few hard launches. If you've already done this then power too you. I hated that part of mechanical design. If not and are interested in this analysis PM me and I can point you in the right direction. I love projects like these! +1 to the factory five racing frames, they are top notch and well engineered.

 

I am still researching wich alloy to go with as far as Transverse forces It will be press fitted bearings in the centre housings.
I have Allegory so I have been playing with my cad with different processes but it is looking like it will be out of Billet steel and the Cadmium Plated and then stresss relieved and then micro polished. But still trying to find out the right materials for the base steel to wich alloy will be best. Ultimate would be Titanium but would raise the cost of project $3k

 

GTM baby I've been druling over that car for a while now..

 

If you do spin it to 11,500rpms, and can manage to pull good torque to that level, you will make WAY more than 690hp.

 

I've wanted to do this as well but I'm only 18 and poor maybe in 20 years or so after a bit more experience

good luck with this though I'd love to see this when it's complete!

 

I am being conservative
I hope for more than that but only when I get it built. and then Engine Dyno Broken in and Tuned will I find out.
Right now the 6400 dolar price tag to get my e-shaft CNC Machined, then Stress Relieved then micropolished is holding me back I have ALL of the parts to do it now except the e-shaft. Once the engine and drive train is built I was going to start on the frame but am waiting for the brochure for that GTM.

 

hello! I am wondering, what is the price of a rptary engien? i have a mazda 323 and I want to put o rotary angien on it! doese enyone know or have an idea on the price!(please give me a PM)tnx!!!

 

I believe the factory shaft is 4140 chromolly, hope this helps.

You might want to get in contact with Steve at MPS, Mechanical Power Systems. They already make 2 pc 13b and 3 pc 20B shafts. It might cost less initially for them to make you one for your 4 rotor. I believe their website is www.mpsys.ca

Good luck with your project

 

^^I was told he quit making e-shafts cause nobody was buying them.

 

That could be, its been a few months since I talked to him.

 

Have you looked at any of the 4 rotor kits out there? Might be a bit cheaper just buying stuff instead of fabbing everything yourself.

 

well twekit has a three piece 4 rotor e-shaft for 9k AUD at this point i can most likely still build it cheaper making a one off. I am going to buy the SAE paper on the Mazda E-Shaft next week to ensure my design is proper then I will order the material. Then I will hand it off to a machine shop that can do everything in house one in calgary most likely and let them do it at their leasure (in the down time) to save me some money. That way it will keep the cost down. I figure it should cost me about 7k CAD to get the e-shaft Manufactured.

 

Sweet. I definatly would like to see the progress made on this.

 

sounds nice. would love to see it happen.

 

Check out Autotech Motorsports LLC; they have mede e-shafts for 23A and 26B (4 rotor). As for transmission go Lenco they have trans that can hadle street to 5000 whp

 

I looked into Lenco, they have only level shifting or sequential coupling gear boxes made for drag racing that is definitely not what I am looking for.

as for autotech I would have to purchase an actual 26b Mazda motorsports centre housing in order to use that e-shaft from what I can tell. I plan on using in this order

FD front cover S5 Na Front Plate Rotor Housings Centre Plate, then a 20b centre plate, then a S5 Na centre plate and finally an s5 Na rear plate. to make y 4 rotor that won't cost me an arm and leg to rebuild or find parts for. that 20b housing last I price checked it was 2200 each. USD

 

Another option is OS Giken close ratio or Grex (Trust) six speed.

 

I know a shop that build a 26B by coupling two e-shafts. I think it was Grannyspeedshop not sure.

 

Well I did some more investigating. Jeff Bruce of Precision Engineering. He is the one that makes the kit that xtreame rotories, guru, and tweakit sells. I think the entire kit from them would be about $5500. That includes cranks center housing oil feed/bearing modification, dowles and bolts. He makes 13B and 12A kits.