WOW, this can't be real...can it?
 

Hello everyone,

OK, I trying to learn all I can about the Rotary engine and RX-8. I know it's a twin rotor engine but I pictured the rotors that spin in the Renesis engine much bigger than the ones in the pictures below:

No way that that is the actual size of the rotors...NO WAY, if it is....

I JUST BECAME A LOVER OF THE ROTORY ENGINE....NO WAY....

How can so much power come from such a small...small engine, I thought it was small...but not that small...NO WAY!!!

GOOD JOB MAZDA...wake up Detriot...invest in the Rotary!!!! No way...

that's them....

Thats just a practical joke, real rotors are the size of that guy. ;)

Detroit did invest in the Rotary, Chevrolet worked on rotary powered corvettes for a long time in the 70s, Mercedes had several fast rotary race cars that they experimented with as well.

You guys are lying...NO WAY....NO WAY.....

How can...I mean, it's so...but it makes 238HP...yet..it's...NO WAY....

Yep, 13b rotors are 10" across IIRC.

I mean...I never expected this! I never thought the rotors were so small. How the heck do they get 238HP out of that engine? My LORD...I was impressed with the 8 but now I'M BLOWN AWAY!!!!

Now I understand...now I see the light, now I know why you guys call this a modern engine while the piston engines are old tech. I have seen the light and I NOW KNOW, GOD WILLING, that the 8 is FOR ME!!!

What is wrong with the auto companies out there, THEY NEED TO INVEST in the rotary...they just have to. I am still in shock...NO WAY!!!!

NO WAY!!!

THE 8 IS[B] GREAT!!!!!

I'm still in shock...STILL speachless, but just as a reply to abbid...

I heard that Mazda was working on a 1.6L rotary that made 300HP...from the grapevine, not sure if it's true or not.

WOW!!! NO WAY!!!!!

WOW!!!!

Wow

This thread is hilarious. How big do you think a piston is? They aren't very large either lol.

The extra power will come from widening the rotors. The difference between the 12A and the 13B engines is that the Rotors are 10 mm wider on the 13B. Aside from the porting changes, this gives it the extra power. Mazda has experimented with the 15B, 1.5 Liter, with wider rotors. The expense of new tooling equipment would be too great. I can see Mazda adding another rotor to the Renesis and making a 20B (2.0 Liter). Although, I did hear a while back of a Mazda Rep saying something about larger displacement engines.....

YES...WOW!!! I can't say it enough...WOW!!!

WOW
WOW
WOW

I have seen pistons and one piston or two for that matter can not even come close to two rotors. A V8, while I love them so, just lost some of it's greatness because of what I have seen from the Renesis...NO WAY!!!

Well...they should have never given up!

Ahhh, more knowledge...MORE ROTARY INPUT....I'm loving the 8 MORE AND MORE!

rx8wannahave- i'm better now-and yes those are the rotors- you have to see the whole engine assembled to realize what a marvel the RENESIS engine is.

That's probably around the size the powerplant of the 4th gen RX-7 will have, since it's supposed to have basically a 1.6 liter version of the Renesis. Of course that's all rumors.

I always thought simply supersizing the 13b would be a good idea. The 13b isn't the most torquey (is that a word?) engine in the world. So just give it bigger rotors and give the eccentric shaft lobes that protrude more. Torque is just force multiplied by distance. So giving the eccentric shaft bigger lobes will increase the distance. And since the displacement will increase, the force that acts on the eccentric shaft will also be greater. So you get more torque (which also results in more HP, BTW).

I'm glad your doing better, hay...life is tempoary take it slow (cept in your 8)! I do, I want to see the engine myself...in person. I need to find more pictures of the engine and send a letter to Mazda. I mean...MY GOD...this has shown me the light! WOW!


It's probably not that simple, but I agree...I just wish there were more companies working on the Rotary. Thanks for the information...I want more...WOW!

I think Mazda needs to go all the way and make it a 2.0L 2 rotor, the 20B doesn't even make all that much HP naturally aspirated. 300BHP with room for increases in HP with tuning. 2.0L peripheral exhaust port 2 rotor turbo, now we talking power :)

I really wish they would saction rotory engine's use in racing, if they allowed that, there would be far greater developments on the engine than we do today.

Eh? Speedsource RX-8s? Formula Mazda? ITA? ITS? GTU? Le Mans?

The rotary has a huge racing history and is currently actively racing with the new renesis in a few different types of racing.

What was that really old Ford 'race car' back in the 'teens? It had a 4-banger in it...but each piston was about 10" or more in diameter - huge!

This little RX-8 rotary is only 1.3L...that is why it always amazed me that people compare it to a 350Z or whatever. The engine is pretty amazing.

The Corvette experiment back a couple of decades ago (?) was with putting a 4-rotor in a swoopy body...it would have been AWESOME!

Did someone add rotary motorcylces to the mix? Felix Wankel "inventor of rotary motor" shopped idea to many major manufacturers....however Mazda was first to put into mass produced vehicle and make tangible for eveyday use. Someone give rx8wannahave his meds. :D

P.S. the corvair was originally designed wih a rotary engine but due to extended testing and reliability issues was scrapped for conventional pushrod motor..efficiency has alot to do with power output, despite ts smaller size it is highly efficient in burning air and fuel intrroduced into combustion chamber...many compare the rotary to a six cylinder engine due to each rotor firing three times per rotation

If you've ever seen a stripped down rotary engine before (with the alternator, intake and exhaust manifolds, etc. off of it) so it's just a bare block, you'll be blown away. They are freaking TINY - your 17 inch CRT computer monitor occupies much more space, and weighs damn near as much.

If memory serves, a naked 13B engine is about 18 inches tall by 14 inches wide by 16 inches deep - about the size of a small microwave oven.

Yes, the rotors are tiny. I have a rotary engine clock on my desk - completely cool! Here's the link to buying one:

http://www.atkinsrotary.com/store/cu...cat=560&page=1


And, here's the photo of it (not from my desk). The clock in the center gearset of the rotor is about 3 1/2 inches in diameter.

http://www.atkinsrotary.com/images/demo.jpg

wow

Yes, Meds please...cause my jaw is still on the ground!

I have to admit, I really liked the 8 based on it's looks, interior, and performance but was worried about the Rotary engine. I knew only a little about it and did not like it's lack of torque..but...

After looking at what that little engine can do...I'm WOWed! I can't belive that the rotors are that small...I just cant! I wish I could find an old rotory I could take apart and gawk at.

WOW, people...have you ever sat down and thought about that engine of yours...WOW!

Nice, only $45 bucks huh...you guys/gals are making me into a ROTARY HEAD! I can't wait, GOD WILLING, I can't wait for my turn to love an 8.

Those sweet tiny rotors...WOW!