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Old 04-10-2008, 06:31 PM   #1
Phoenix7
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I'm going to step up and say you have the rarest rotary car on this forum.

I'd love to see pics!

Have you looked into ceramic seals?? I've read that the early NSU rotaries suffer from more wear and tear than the Mazda rotaries (rebuilds aren't uncommon at 50K miles) and ceramic seals (apex and side seals) might help with the longevity of the NSU rotary.


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But I've learned that people that don't like guns, tend to like stretched tires.

Which makes perfect sense. They are sacrificing safety either way. lol



Last edited by Phoenix7; 04-10-2008 at 06:36 PM.
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Old 04-10-2008, 08:31 PM   #2
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Quote:
Originally Posted by phoenix7 View Post


I'm going to step up and say you have the rarest rotary car on this forum.

I'd love to see pics!

Have you looked into ceramic seals?? I've read that the early NSU rotaries suffer from more wear and tear than the Mazda rotaries (rebuilds aren't uncommon at 50K miles) and ceramic seals (apex and side seals) might help with the longevity of the NSU rotary.


N.R.S. Rotor Sports
Edmonton, Alberta
http://members.shaw.ca/nrsrotorsports/index.html
Actually, I have considered ceramic seals. Unfortunately, I think they were going to cost more than $1000 for a set from JHB. Does your shop custom make seals?

Carbon seals will work great, and they'll last 50K miles, which is plenty for me. However, I've been told they can break if or when (in the case of my car) backfires.

Steel seals are stronger and work well with the cermet, but they take forever to break in, and develop less compression, at least in the NSU motor.
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Old 04-10-2008, 08:47 PM   #3
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Quote:
Originally Posted by Phaedrus View Post
Actually, I have considered ceramic seals. Unfortunately, I think they were going to cost more than $1000 for a set from JHB. Does your shop custom make seals?

Carbon seals will work great, and they'll last 50K miles, which is plenty for me. However, I've been told they can break if or when (in the case of my car) backfires.

Steel seals are stronger and work well with the cermet, but they take forever to break in, and develop less compression, at least in the NSU motor.
well they ARE expensive but the NRS seals have been tested up to 1000+hp drag cars, 3 rotor speedboats (800hp) and were tested to see how well they held up to detonation and they seem to hold up very well to abuse. The housings come out damage free and actually polished because of these seals.

The only problem I see is the size difference in rotors. He's made the seals for 12A and 13B motors so far and I don't know ANYTHING about the NSU and it's dimensions.
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Originally Posted by Monkman33 View Post
But I've learned that people that don't like guns, tend to like stretched tires.

Which makes perfect sense. They are sacrificing safety either way. lol



Last edited by Phoenix7; 04-10-2008 at 08:50 PM.
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Old 04-10-2008, 10:04 PM   #4
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That does sound good actually. This engine makes 50 hp, but I like the fact that they don't damage the housing. I'm going to try my steel Ro80 seals in my cermet housing first, they may just do the trick. But if they don't, I will definately give ceramic a look-see.
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Old 04-10-2008, 10:13 PM   #5
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Hey all

Not up to speed on NSU stuff. This is a 1 rotor right? I think they used a 6mm seal just shorter than 12A?

The best option, if considering ceramic seals, is to find other owners of like engines to keep the cost down. If you are using cermet housings you will want ceramics.......cermet loves ceramics Even if you are not ceramics will be kinder to the housings.

Cermet housings with 80,000 miles on NRS 3mm 2pc:






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Mild to wild, street to strip, when you want to go fast and you want your engine to last, NRS Ceramics is the only way to go.
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