aluminum renesis rotors?
 

im not sure on this, but the sales guy at the mazda dealership told me that the new rotors are all aluminum. is that true? i heard him tell me that and was a little unsure. i had to help him out while talking to another customer about how it worked. he was very sure that the rotors are aluminum.

paul

Interesting......

Did he say Aluminium or Alloy?
coz theres a world of difference.

That would make them damn light if they are all Al.

wouldn't aluminum melt... thats what i thought

Re: aluminum renesis rotors?
 

no

thanks now. i figured he was wrong. he also said that the side housings were aluminum. . . this i know he was wrong on. i didnt believe that one bit. haha.

paul

So what exactly is the reason alloy rotors would melt? Forged alloy pistons are regularly used in Honda engines. (ha ha, I am a honda owner too. :) ) Isn't the reason rotary exhaust gas temps are higher than piston temps is because rotaries don't burn the air/fuel as long and expel it out the exhaust earlier than a piston engine would? Piston engines run leaner, too, meaning higher actual combustion temps.

Is there any news on if these rotors will swap into our cars?

You'd have to watch the compression ratio using these rotors since the renesis is a higher compression engine.

Tim

they are aluminum covered in hard chromium surface and there hollow inside (i read somewere thy are ten lbs. lighter)

the previous rotors were like 9lbs, so shaving off 10lbs makes them very light indeed

lol..

Maybe it was a 10lb savings overall? just a guess. If the new rotors are -1lb though I would stack them in my trunk untill the scale reads zero! ;)

well, someone correct me

see, they become -1 lbs because they melt

has anyone ever had osmosium rotors? thats what i want to get.

Are they made of unobtainium? ;)

Put your hand behind your honda exhaust while the car is running. Then do the same with your 7. Nuff said.

All rotors are hollow, for what it's worth. Oil is sprayed into the rotors for cooling, via jets in the eccentric shaft.

God I *hope* the rotors are iron, and not aluminum. Iron expands much less than aluminum when heated. This is one advantage rotaries have over piston engines... you blow a hose and lose all coolant, you can keep going until you can safely shut off the engine. In a piston engine, you keep going until the pistons sieze in the bores.

This isn't a big considertion for cars, maybe, but it's damned important in an airplane. And some people who've put rotaries in aircraft have suffered complete cooling system failure, and were able to continue flying until able to make a safe landing. That's the neat thing, overheat it and it'll keep running, until you shut it off. Then it won't start again :)

yes and another plus for planes is that if you loose a rotor, its still running on the other one(s), unlike say throwing a rod in a piston engine

mike

there iron, just thinner then previous rotors, hollow and cast like previous rotors. I think there ~8.5 pounds, i think a tad lighter then racing beat super light weight rotors. Also i doubt a compression bump of .3 is going to matter enough to cause detonation(over s5 NT rotors) The rotors are the same dimensions as ours, just a lil higher compression, about a pound lighter, have shallower apex seal grooves(only renesis seals would work), thinner seal grooves (~1.9mm), and ive also heard reports of .5mm side seals, instead of .7. Also the rubber corner seal plugs look differnt (no "notch" for the seal beacause there shorter) and there are now 3 oil control rings, which also may be thinner(outer one is metal and used to protect the second oil control ring form being exposed to hot exaust gasses, and could possibly be ommited when swapping the rotors to a p- port exaust car. The only problem i see, is that the oil squirters may not squirt nto the rotor anymore because the rings moved in a tad(or did they just make them thinner and take up the same space?).

Wouldn't that mean new stationary gears and rinig gear in the rotor?

The third "oil control" ring is actually called a scraper. Protects the oil rings from exhaust heat, donchaknow.

BTW - something I've been meaning to ask, and this is as good a place as any: What is the engine's designation? Is it a 13C? 13B-MSP? (I *refuse* to call this thing a "Renesis", that is the lamest marketing-fabricated pseudoword *ever*)

Vicuna is an animal who's fur is several shades of brown. It's also a marketing strategy for a new color from Chrysler some years back.

The rotor housings still say 13B on them. But no one knows if there are extra letters to let you know if it's got machined exhaust ports or not. Apearantly, it's really hard to see the raised '13B' on the housing under all that rat's nest.

Well someone should put these into a FC NT engine, cuz Mazdatrix is selling the rotors for $287, but all the seals and such are a tad bit more expensive than our rotors.

So let's just call it a "Series 9" engine. :) (Given that the RX8 is an "FE" chassis)