love my NRS apex seals/springs.

i recently dis-assembled my motor that ran in 09 and found the rotor housings literally looking exactly like they did when i assembeled the motor. no trace of wear anywhere.
the seals/springs looked unused. the motor was making 507 SAE rwhp at 20 psi w around 20% methanol.

the motor was steadily gaining compression during the year and could have easily reassembled as was. i took it down to swap the rear iron for an automatic rear plate as i am switching to a T56 for my 200 mph run at the Texas Mile.

thanks NRS!

howard coleman

www.colemanprecisionrotaries.com

I often wondered what the reasoning was with the 2 piece mazda design that needs to gouge the housing in order to make a total seal. The older mazda truck seals and the NRS seals from a function point would seem to seal better with less damage to the rotor housing.

Howard, are you running the facoty MOP setup or premixing in the fuel tank? What brand and what ratio?

You are welcome Howard! Thanks for the shiny review. This is what makes it all worthwile. Hey can you post this in the apex seals thread?

"are you running the factory MOP setup or premixing in the fuel tank? What brand and what ratio?"

i do not run the factory EOP. i also remove it from all motors i build. i mix 1/2 oz per gallon for street and 1 oz per gallon for dyno and track.

i use Super Tech (Walmart) brand 2 cycle oil.

love it.

BTW, my NRS seals are one piece.


hc

Hey Howard, could you put up some pics of those rotor housings and the apex seals? If you could put it on the "test results" thread that would be great.

after a year of pounding on the motor... 507 SAE. zero chatter

http://img230.imageshack.us/img230/6050/029li.jpg

http://img153.imageshack.us/img153/307/015p.jpg

uncleaned just as the came out of my motor...

http://img175.imageshack.us/img175/7654/050af.jpg

http://img141.imageshack.us/img141/9633/047h.jpg

gorgeous, don't you think?

http://img175.imageshack.us/img175/1986/051.jpg

i wish i could better convey how perfect the crown is...

hopefully these will power me past 200 mph at the Texas Mile in October.

howard

www.colemanprecisionrotaries.com

Thanks Howard, looks great!

I've resized and gamma corrected a couple of the pics below

http://img.photobucket.com/albums/v4...pchousing2.jpg

http://img.photobucket.com/albums/v4...1pchousing.jpg

http://img.photobucket.com/albums/v4...mm1pcseals.jpg

http://img.photobucket.com/albums/v4...m1pcseals2.jpg

any updates?

Not really at this piont. We are testing some other parts now and will possibly try to incorporate them in the testing later on if all goes well. The corner seals were very tight on new rotors, even when made to factory OD spec. They were fine on used rotors though. Rob from Pineapple will make sure they have enough clearance by boring the cs slot to give them the best chance.

"Because one day, steel will rust, in Carbon Fiber, Titanium, and now Ceramics, and Chrome I will trust!"

-Me
Just now.

Sven, I hope we have time for coffee sometime man.