Can you do this? Wait, I know you can what would need to be modified to do this? We need heavy hitters on this question!!!

 

Question...why? higher comp? you'll need an rx8-spec e-shaft then for balance, and at that point you're spending a buttload to do this, no? :/

 

So RX8 e shaft, counterweight and rotors and I'm set?

 

I also have to ask, why?

 

haha....well don't worry guys about why I'm asking the question. I need someone with experience to answer this!!! Anyone? Hailers, Icemark, Aaroncake?

 

******' waste of time, unless you're trying to build some kinda cheater motor...

Kouki FC non-turbo rotors are already 9.7:1.
Can you really tell the difference versus the RX-8 10.0:1 compression?

The RX-8 rotors runs significantly shorter apex seals.
These are not recommended to retrofit into earlier peripheral exhaust ports due to bending (and failing) issues.

If you're looking at the SE3P power output, it's mostly due to the complex intake system and higher redline.
The rotors and slightly higher compression is not it.

So why all the hush-hush?
It really sounds like you don't know what you are doing.


-Ted

 

WOW... i know ive seen some real responses... but I don't know how much more real RETed can be.

roger that~

 

i love reted's responses always make me laugh

 

Very good, someone has done their homework. Clap for the reted! There is another aspect about the rotor that you didn't mention that I am wanting to look farther into. Plus the lighter assembly makes it a bit better for high RPM applications. Before you go off and be a {edited} think buddy.

 

Also, if you aren't gonna add any constructive positive feedback then there isn't a need to post. I asked a question becuase I'm not 100% sure and I don't wanna **** anything up!

 

You're right - you can mill the apex seal slot to accomodate a taller apex seal, but I heard you cannot mill them to accept the full 8.0" apex seal from a 95-prior rotary engine, cause you end up cutting through the rotor.

Lightened rotors?
Why not just lighten a 95-prior rotors instead?

Lightened rotors implies you're going to rev the bitch out of it.
Ultra high redlines implies radical porting.
Radical porting implies a **** load of work and MONEY.
Lightening pre-95 rotors should not scare you if you got MONEY.

Which means...
You're trying to get cheap.
Cheap will bite you in the ***.
All of this kind of info is all over this forum, and a proper search would've easily turned up results.

{edited}


-Ted

 

You know what, I wanna make an apology. I really didn't mean to blow up that way.

To be honest, I don't know 100% what I'm doing thats why I asked. I figured someone else had tried it.

I didn't mean to personally attack RETed or anyone and I sincerely apologize for my child-like behavior.

 

Yup, sorry going through school don't have a whole lot of money. Just trying to look at possible alterntives. I did search and came up with nothing that answer the questions I had.

 

no worries... but you can only do so much to a rotary from my experience and overview before you end up in the 10's of thousands of dollars and a nice fat whole in your wallet.

If you have done your research, im sure you got some intel off of it. Good luck, and if you start to create some serious project seven. Start a knowledgeable thread

ftw

 

I have a buddy here that runs the RX8 rotating assembly inside a streetported s4 n/a keg and it is great. "BUT" this was done by an experienced builder and everything works well together and he paid dearly for it. So, yeah it's a great idea if you have a bucket of cash. Personally, the well recognized s5 na assembly with the s5 n/a intake system would be a best bet for anybody! The builder just happened to have a great s6 assembly from a turbo conversion, otherwise he would have done the familiar s5 combo.

 

Ted, who's your source on the seal milling issue? I was looking to run the 8 rotors as well, but I had heard that they could be milled to fit normal apex seals without any detriment.

 

Thread posts edited for flaming

And, my comments on the thread itself:

And there is no advantage using the the FE rotors over using any pre-'02 rotors. In fact using the S5 non turbo rotors will net you almost exactly the same HP and you don't have to worry about either the side seal or apex seal issues that using a Reni rotor will have when used in a pre-'02 block. The only (and it should be repeated) only advantage to the FE rotors is the Chamfer on the leading edge, which tends to change the intake timing slightly, but IMHO, that same Chamfer could be put on the S5 rotors just fine.

BTW Mazdatrix built a motor a couple years back using the FE rotors and it didn't gain anything (well actually I think they gained 1 or 2 hp) over a S5 non turbo rotor other than headaches.

 

Read and learn.

https://www.rx7club.com/naturally-aspirated-performance-forum-220/full-bridge-port-crazyness-740643/

 

And I'm always nervous I get such a slap from dady Ted when I post question wich may be stupid or have an aswer somewhere... as my last thread with no answer, maybe something very stupid and Ted is hittting is head on the wall reading it... a kinf of FC judge But Judge Dread style...

 

I swear I read it somewhere in here, but it might be just an incompetent machinist... :P
Sorry I can't keep tabs on this stuff better, but it's really a non-issue for turbo applications.


-Ted

 

From what i here, it is possible, but if you're off at all when milling or make any mistake, you'll destroy the rotor, the castings are just too thin to do it feasibly. It's a waste of money.

Also I think you meant to put 8.0mm instead of 8.0" ted

 

this is a waist of time trust me i've put plenty of time into researching the RX-8 internals in a S5 or S4 motor and there realy is no point. if you want more power turbo if you want reliablity DONT SCREW WITH IT!!!!! LOL. trust me i've tryed to do some many different things before sucumbing and deciding to turbo i wen from NA biuld,Supercharged NA, Turbo NA. currently im waiting on a 13B-RE and i still caught hell for wanting a 13B-RE with paralle twins rather then a single turbo.

 

so, as long as money is an issue, don't worry about trying to change any internals.

/thread

 

I am still wanting to know..... WHY?

 

RX-8 rotors are slightly beveled from factory. I think it has something to do with their side exhaust deal. Not so sure how this is gonna work with peripheral housings.
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<a href="http://s48.photobucket.com/albums/f228/turbo_hatch93/?action=view&current=rotor.gif" target="_blank"><img src="http://i48.photobucket.com/albums/f228/turbo_hatch93/rotor.gif" border="0" alt="Photobucket"></a>
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Look close.
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