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NRS Rotorsports www.nrsrotorsports.com (Canada) Ceramic apex & corner seals for rotary engine applications

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Old 12-01-2009, 10:39 AM   #1
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Default NRS FD Ceramic Seals for the RX8

Yes it can be done; and so far it works great for my car!!!!

Sven is SUPER SUPER helpful and got me all set-up; Speedsource milled my rotors for less than $300 - so $1300 total and you too can have a motor that is stronger; I have never seen an RX8 pull 21" of vacuum at cruise (NOT DECEL) until now....

Dyno results soon.


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Old 12-01-2009, 07:51 PM   #2
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nice, man
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Old 12-01-2009, 09:23 PM   #3
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Kane, what kind of power are you shooting for?
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Old 12-02-2009, 06:43 AM   #4
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I'd be stoked to hit 400WHP no meth on pump gas @15 PSI or so

But in reality I'd probably be at 360-370 until I up the boost and I'll need to add meth or water injection for that.
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Old 12-02-2009, 06:59 AM   #5
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I'm not sure about this but can you use FD rotors and turn up the boost?
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Old 12-02-2009, 07:54 AM   #6
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My understanding is it's the plates that are weak point in the renni. They can't handle too much heat or too high combustion pressures.
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Old 12-26-2009, 09:57 PM   #7
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Did you use 2mm or 3mm seals?

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Old 12-27-2009, 07:10 AM   #8
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2mm.
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Old 12-27-2009, 07:00 PM   #9
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Not that their is anything at all wrong with that decision but if you were looking for stronger and had to mill the rotors anyway, why didn't you go with 3mm?

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Old 12-27-2009, 09:34 PM   #10
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The Mazda cast is not deep enough. I mean it will work but it doesn't leave much material. I would be concerned about extreme high load situations with 3mm seals.
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Old 12-28-2009, 12:26 AM   #11
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Quote:
Originally Posted by 05rex8 View Post
The Mazda cast is not deep enough. I mean it will work but it doesn't leave much material. I would be concerned about extreme high load situations with 3mm seals.
Could you please elaborate? How is it different from doing 3mm on an FD rotor? Which would be the part that is too thin?

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Old 12-28-2009, 06:53 AM   #12
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It's the width.

I talked to Kevin (Rotary Resurrection) and Speedsource about it.... turns out when they widen the groove; it has a tendency to break off the shoulder of the rotor. But you don't know that until AFTER the motor is re-assembled.

If memory serves, Kevin said he loses 1 out of 4 8 rotors milled out... that is too high of odds for me.
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Old 12-28-2009, 09:29 AM   #13
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Do you know what the failure rate is for milling them deeper for use in earlier 13B engines? I'm assuming that's the milling that you did have performed, correct?
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I think Brian's idea of romance is using lube.
Your rage caused the meteor strike in Russia. The Antichrist would be proud of his minion.
You win with your thread. Most everything
It's a truck with a steel gate on the back. Just a statement of fact

Motec M820, AIM dash, ported 13B-RE Cosmo, 6-spd trans, 4.3 Torsen, custom twin wg fully divided mani, Custom 4" split into 2x 3" exhaust, Custom HMIC, Custom custom custom custom I like to welder stuff....
No Bolt-ons allowed. Dyno'ed @ Speed1 Tuned by me - 405rwhp on WG.... WM50 cuming soon.
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Old 12-28-2009, 02:11 PM   #14
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Is what your referring to a machining error? As it needs to be a very accurate/precise machining process? So it being the machinists fault and not the rotor itself?

When machining an FD rotor to 3mm, there have been many cases where machinists don't get it spot on and trash the rotors. But this has to do with the machinist you go to. Once you find the right machinist, trashing rotors is no longer a problem.

Just trying to figure out why. Thanks.

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Old 12-28-2009, 07:08 PM   #15
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Quote:
Originally Posted by TitaniumTT View Post
Do you know what the failure rate is for milling them deeper for use in earlier 13B engines? I'm assuming that's the milling that you did have performed, correct?
I did have it performed by Speedsource. I do not know that the failure rating is - but I know it's pretty low.

Quote:
Originally Posted by thewird View Post
Is what your referring to a machining error? As it needs to be a very accurate/precise machining process? So it being the machinists fault and not the rotor itself?

When machining an FD rotor to 3mm, there have been many cases where machinists don't get it spot on and trash the rotors. But this has to do with the machinist you go to. Once you find the right machinist, trashing rotors is no longer a problem.

Just trying to figure out why. Thanks.

thewird
Kevin can better answer that question - obviously 99.999% of the time is machining or material defects.... nothing technically should prevent you from running a 3mm seal in a RX8 - I just was unwilling to take the risk since 8 rotors are pretty expensive.
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