RX8 rotors in S4 housing?
07-24-08, 07:34 PM
#1
87 NA build in progress
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RX8 rotors in S4 housing?
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!!!
07-24-08, 09:16 PM
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07-24-08, 09:44 PM
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07-24-08, 10:40 PM
#6
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******' 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
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
07-24-08, 10:43 PM
#7
******' 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
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
roger that~
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07-24-08, 11:00 PM
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******' 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
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
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.
07-24-08, 11:02 PM
#10
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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!
07-24-08, 11:14 PM
#11
Lives on the Forum
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
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
07-24-08, 11:15 PM
#12
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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.
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.
07-24-08, 11:17 PM
#13
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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
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
07-24-08, 11:47 PM
#14
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
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
07-25-08, 09:09 AM
#15
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.
07-25-08, 10:10 AM
#17
Former Moderator. RIP Icemark.
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.
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.
07-25-08, 10:22 AM
#19
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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...
But Judge Dread style...
07-25-08, 10:53 AM
#20
Lives on the Forum
Sorry I can't keep tabs on this stuff better, but it's really a non-issue for turbo applications.
-Ted
07-25-08, 11:16 AM
#21
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
Also I think you meant to put 8.0mm instead of 8.0" ted
07-25-08, 12:25 PM
#22
whats a Turbo V?
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.
07-26-08, 11:24 AM
#25
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¤t=rotor.gif" target="_blank"><img src="http://i48.photobucket.com/albums/f228/turbo_hatch93/rotor.gif" border="0" alt="Photobucket"></a>
<br>
Look close.
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<a href="http://s48.photobucket.com/albums/f228/turbo_hatch93/?action=view¤t=10008L.jpg" target="_blank"><img src="http://i48.photobucket.com/albums/f228/turbo_hatch93/10008L.jpg" border="0" alt="Photobucket"></a>
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<a href="http://s48.photobucket.com/albums/f228/turbo_hatch93/?action=view¤t=rotor.gif" target="_blank"><img src="http://i48.photobucket.com/albums/f228/turbo_hatch93/rotor.gif" border="0" alt="Photobucket"></a>
<br>
Look close.
<br>
<a href="http://s48.photobucket.com/albums/f228/turbo_hatch93/?action=view¤t=10008L.jpg" target="_blank"><img src="http://i48.photobucket.com/albums/f228/turbo_hatch93/10008L.jpg" border="0" alt="Photobucket"></a>