2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Why cant we add more rotors to our engines??

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Old Mar 29, 2003 | 11:21 AM
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Why cant we add more rotors to our engines??

Ok so this is a topic that ive never seen really discussed in this forum and it has always been somthing that ive wondered.
Lets say that you added 2 more rotors to a 13b, woudlent that double the size of the engine and potentially double the output of a rotary. I mean with the 20b its 3 rotor, but why did they stop there?? Why not go for a 4 rotor N/A that would produce even more HP. What would it take to do somthing like this?
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Old Mar 29, 2003 | 11:26 AM
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uhh

they did make a 4rotor. It won the lemans, the 787b =/
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Old Mar 29, 2003 | 11:27 AM
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Umm....emissions and we would get pretty bad mileage too.
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Old Mar 29, 2003 | 11:32 AM
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Emissions is the main reason that I can think of...Notice the stock 2 rotor has somewhere in the neighborhood of a jillion cats attached to it. Think of the size of the ******* cats a 4 rotor would legally require? YOud probably have to put them in a side car or something.

Jarrett
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Old Mar 29, 2003 | 11:35 AM
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Not only that, if we added 2 more rotors, it will mess up the great 50/50 balance of the car and add a higher tag to the purchase price if it was ever made.
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Old Mar 29, 2003 | 11:35 AM
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Re: Why cant we add more rotors to our engines??

Originally posted by RylAssassin
Ok so this is a topic that ive never seen really discussed in this forum and it has always been somthing that ive wondered.
Lets say that you added 2 more rotors to a 13b, woudlent that double the size of the engine and potentially double the output of a rotary. I mean with the 20b its 3 rotor, but why did they stop there?? Why not go for a 4 rotor N/A that would produce even more HP. What would it take to do somthing like this?
****, my last post just completely missed the topic..Sorry!

They do make a 4-rotor, I have the link somewhere. Its expensive as hell, but it makes some ungodly amount of Hps, like 1000 I think....Where is that damn link...
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Old Mar 29, 2003 | 11:38 AM
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http://www.fullboost.com.au/events/g...xpo_03_30b.jpg

http://www.fullboost.com.au/events/g...xpo_03_31b.jpg

Dont drool all over yourselves...

Jarrett
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Old Mar 29, 2003 | 11:45 AM
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Wow!
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Old Mar 29, 2003 | 11:49 AM
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i want one hehehe
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Old Mar 29, 2003 | 11:50 AM
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HOLY MOTHER OF UNGODLY THINGS!
THATS AWSOME!

Hey Jrat thanks i really had no clue they existed and im glad it does, The emmissions part of the whole idea makes me realize that this idea is complety not feasible.
Thanks
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Old Mar 29, 2003 | 12:26 PM
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and here is what one sounds like

http://www.mybrainhurts.com/videos/c...rt-and-rev.mpg
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Old Mar 29, 2003 | 01:09 PM
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If only i had one of those lol...
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Old Mar 29, 2003 | 01:17 PM
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man the sound of that car is beautiful..
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Old Mar 29, 2003 | 01:19 PM
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drool...........................i wonder what they going to use as of ECU,ignition,fuel controll, planning to build one myself in 06'
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Old Mar 29, 2003 | 02:55 PM
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Oh man thats nothing, Ive got for of those sitting in my garage....................*wakes up from dream* Damnit
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Old Mar 29, 2003 | 03:20 PM
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hm... doesnt the 787b have 3 plugs/rotor and peripheral ported housings?
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Old Mar 29, 2003 | 03:37 PM
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Long e-shafts are expensive to make strong enough not to break. Long intake and exhaust manifolds are also more expensive, and such an engine would weigh 2x+ what a 13b weighs, because not only are you doubling size/mass, but you're adding more on top of that for additional strength. FOr instance, a 20B weighs MORE than 150% of a 13B.
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Old Mar 29, 2003 | 04:15 PM
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Not to mention getting one to fit under the hood of a fc.
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Old Mar 29, 2003 | 04:56 PM
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grrrrrrrr that sound alone is enough to drive a rotor head nukking futz. by the way to fix the weight balence issue is to move the firewall back....
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Old Mar 31, 2003 | 04:55 PM
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it sounds crazy but i had the idea once that you could take the new renesis and apply that technology and what you would have would be something like a solid maybe 700 horses NA and not only that the engine is lighter and you wouldnt have the emmissions problem nor the fuel consumption true?
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Old Mar 31, 2003 | 04:56 PM
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i meant a 4 rotor renesis.....hmmm..a Fournesis
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Old Mar 31, 2003 | 05:01 PM
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hm... doesnt the 787b have 3 plugs/rotor and peripheral ported housings?
yeap, it does, check out this page i found while tryign to learn about variable length vilocity stacks

http://www.mymazdarotary.com/mazda_r...paper_html.htm

-Jacob
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Old Mar 31, 2003 | 05:28 PM
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so how does the weight and length compair to a v8?
lots of people do those conversions.
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Old Mar 31, 2003 | 09:20 PM
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www.evil7.com has some real badass 2 and 3 rotors
and theyve made 4 rotors before, mercedes benz made one a long time ago, so did mazda, they just never put them into production.
They have made "aftermarket" 4 rotors too from cusotm e-shafts.
Someone even made one by bolting 2 13b's together.
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Old Mar 31, 2003 | 10:51 PM
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whos making that 4 rotor?
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