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Stock Apex seals- 1 or 2 piece?

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Old 06-17-2011, 05:19 PM
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Stock Apex seals- 1 or 2 piece?

Needing a rebuild, and want to go ceramic apex seals, have seen some advertised as one piece and some as 2 piece? What comes in a factory Renesis, one or two piece apex seals?

I thought I read two piece seal better (NA engine), is that correct?
Old 06-17-2011, 05:52 PM
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Stock is 2 piece and yes they seal better than a 1 piece - at idle and low rpm . At higher rpm there should be no discernible difference .
The one piece design is inherently stronger however so its a matter of what you want to achieve .
Old 06-17-2011, 09:05 PM
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Thanks,

That was what I thought, just double checking.

I saw some NRS 2 piece seals for sale at Pineapple Racing (sold out), said fit RX8. I emailed Swen at NRS and he said:

"I am only making RX8 seals on request. I haven't made any 2pc RX8 seals as my design has a smaller corner piece and I need to see if it will work with the short seal."

Not sure if NRS will work? I emailed back.
Old 06-17-2011, 10:23 PM
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Originally Posted by Charles R. Hill
Kane has the 1-piece, tall, apexes from NRS and the last time I rode in the car it idled pretty smooth with high vacuum and drove real nice at low-mid RPMs.
pretty sure he had to set his idle at 1000 - 1100 to achieve that ....
Old 07-11-2011, 09:54 PM
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Sven has done more with ceramic's but we need to show more interest if he's good to spend the time and money on R&D.
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