NRS ceramic corner seals

[ErnieT]

Sven
Can't wait to get them!

[glassman]

The race is on!! Who will be the first to make history?? The first in the world to run ceramic corner seals. Ernie T, Pete in AU or the mystery test bed (engine built to run 13,000 rpm)?? All are on track for around the same time for completion so either way we will have some results soon I spoke to Ray today from PFS and he is about two weeks away in getting Ernie's engine finished. All the best to all of them for thier hard work and participation in testing something that has never been done. Right now I'm working on making the thicker c.s. springs for more pressure and we'll add these to the mix later on.

Meanwhile here's a little teaser preview vid of the NRS sponsored 2mm 2pc 4 rotor BMI RX8 time attack car. More vids to come.

http://smg.photobucket.com/albums/v4...Rotor_0002.flv

[glassman]

This just in from Pete:
Hello Sven,

Here are the compression results, along with applicable notes.

Engine: RR street port (new), 2 piece NRS Apex seal, Ceramic NRS corner seal. 9.0:1 engine compression ratio

Condition, Ambient temperature 22 deg C, 101.5kpa pressure

*0km on engine, tested from engine stand*

Rear Rotor average (picture include) 128psi

Front Rotor (picture included) 132psi

Comments: This is a noticeable increase in cranking compression over other same engines (new, same port timing but with one piece NRS seals and OEM corner seals)… On average the one piece RR engine develops about 95psi compression, this engine you can see is at the 130psi range (OEM sealed engines on same specification develop about 105~110psi).

This compression figure will go up once the seals are bedded in and when the engine is tested at operating temperature. It was tested without manifolds hooked up, but the influence give the very low air flow rate will be negligible. Further tests will be conducted after the engine has be initially fired up and then again after the run in period.

[glassman]

I almost forgot, a set of 2mm ceramic corner seals and hard faced c.s. springs are on their way to Pineapple Racing for the static drag testing. Rob will make a fixture to test the drag created by the steel corner seals and we will compare this to the drag created by the ceramic corner seals. He figures he will need a couple of weeks to get the fixture done. This should give us a baseline to quantify and compare to the real world results. The data will also help us to quantify any changes made in spring pressure as we will be trying a couple of different spring thicknesses for better sealing and rotor stability. Then they will be installed into an engine and all the data collected will be put to the test. There is a real possibility these corner seals could find their way into the SpeedSource RX8. We will present this opportunity to them when the time comes. Their engines consistantly produce power within 1 or 2 hp from one to the next so this would be an ideal situation to prove the benifit of ceramic corner seals.

I will post pics and results from Rob when they become available.