1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

young and dumb

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Old 08-07-03, 05:50 PM
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young and dumb

it has been said that a good machine shop can make anything,

therefore why would it be sooooooo hard to make a larger displacement 2 rotor motor.

larger, wider, housings with larger rotors= higer displacement.

i understand this is VERY complicated task, but while they are at it, they could machine everything from aluminum and save alot of weight.

why has mazda never made a "larger" engine?

ok im done!!!!!!!!!!!
Old 08-07-03, 06:15 PM
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cause you dont need any larger.

already 1.3L engines are getting 500,600, 800hp numbers.

why would you need more?
Old 08-07-03, 06:16 PM
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useing all aluminim wouldnt be great as it would lower the thermal efficiency, the rotary already has a low efficentcy, so thats no good at all


it can be done just $$$
Old 08-07-03, 10:17 PM
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Alumilum housings and side plates would be a good idea though - if properly chromed/ceramic plated.
Old 08-07-03, 10:39 PM
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it has been said that a good machine shop can make anything,

therefore why would it be sooooooo hard to make a larger displacement 2 rotor motor.

larger, wider, housings with larger rotors= higer displacement.
Don't take offence, but you haven't thought this through well. Making the equipment for high volume production of rotary engine parts are not cheap. And making one of a kind rotary parts is DEFINITELY not cheap or even remotely cost effective. And as someone pointed out, you can get 600hp from a 13b cheaper then casting, machining, and only possibly working 5.0L?(whatever you want displacement) from a 1 or 2 or whatever number rotor engine. Not to mention custom apex seals, stationary gears, etc, etc etc. Did I mention etc?

With that amount of money you could afford to somehow build a 13b with 600hp you could drive everyday I bet. Probably a bunch of them.
Old 08-07-03, 10:56 PM
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Originally posted by Manntis
Alumilum housings and side plates would be a good idea though - if properly chromed/ceramic plated.
very good idea
Old 08-08-03, 01:56 AM
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Of course, aluminum is even better than alumilum...

*kicks his own ****
Old 08-08-03, 02:01 AM
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i was contemplating the benefits of a 8 rotor with rotors half as wide as a 10a
Old 08-08-03, 03:06 AM
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Re: young and dumb

Originally posted by rmayton
why has mazda never made a "larger" engine?
They have but the engine's never made it into production. There was a 15A and even a 21A twin-rotor engine.
Old 08-08-03, 03:29 AM
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Originally posted by Manntis
Alumilum housings and side plates would be a good idea though - if properly chromed/ceramic plated.
Racing Beat makes these for all the plates: http://www.racingbeat.com/resultset....rtNumber=11050

~T.J.
Old 08-08-03, 04:02 AM
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Originally posted by RotorMotorDriver
Racing Beat makes these for all the plates: http://www.racingbeat.com/resultset....rtNumber=11050

~T.J.
Yes....

*agent smith voice*

I've had my.. eye on those, for some time now.


Only notice the price tag.... sigh, some day when i'm rich i'll build a turbo engine with a street port of those plates.
Old 08-08-03, 04:10 AM
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i read a book all about the wankel rotary engine, with all of the trouble that wankel went through to make his first engine, and all of the **** NSU went through i dont think anybody will be trying to re-invent the basic concept anytime soon.

it is too bad though that mazda does not sell the 4 rotor engine they won Le Mans with in '91.
Old 08-08-03, 04:47 AM
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Originally posted by Manntis
Alumilum housings and side plates would be a good idea though - if properly chromed/ceramic plated.
The rotor housings are aluminum.
Old 08-08-03, 05:14 AM
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Yeah.. I was thinking the housings were already aluminum, but the side plates were cast iron... Is this not the case?

Jon
Old 08-08-03, 05:24 AM
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Yes, aluminum rotor housings, iron sideplates.
Old 08-08-03, 05:26 AM
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A'ight, so I don't think before I type...

I shoulda said aluminium rotors, suitably ceramic coated
Old 08-08-03, 05:31 AM
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You've lost your "Master of Space & Time" status, go back to "Exhaust Leak".

Last edited by O 16581 72452 5; 08-08-03 at 05:44 AM.
Old 08-08-03, 06:15 AM
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Space & Time, yes.

Metallurgy, no
Old 08-08-03, 03:03 PM
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~T.J.
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