19

I agree with your praise for this car, I had one back in the day and I have never loved a car as much since. To get more from this Wankel powered beauty, it's all about two things: Getting it to breath better Replacing parts that won't take the higher RPM The good news is that the only part that needs to be replaced, is the RPM gauge sender on the face ...


9

Just like with any other internal combustion engine, there are two ways to increase power output: add more cubic inches of displacement; make the motor think it has a larger displacement. More Displacement The rotary engine (Wankel) is a different breed. You cannot just bore/stroke the engine like with other piston based engines, so you have to go a ...


8

The rotary engine is still a pump so opening it up helps it rev higher and make more power. Opening the inlet and exhaust ports is a big way to make more power at the engine. You still need the rest of the path to open up as well so opening the exhaust and intake path helps. Earlier Mazda RX-7s had anti pollution gear that killed power. There was a reburn ...


7

Mow much money do you have? :D In all seriousness: Swap in a later 13B engine and give it a fresh rebuild. Install a Racing Beat header and exhaust system. The Racing Beat intake is also pretty good. Mind you, this is setup for the upper rev range. Put a good carburetor on it, like a Holley 600 (mechanical secondaries). Do not remove the belt driven fan! ...


7

NOTE: Wankel engines are still Otto cycle engines (re: intake, compression, ignition, exhaust), they just perform the strokes differently than a valve controlled reciprocating engine. Lower Compression Ratio - It is known that a higher compression ratio provides more power without any other modification. This difference in compression ratio is said to be ...


4

Just like a conventional piston engine with poppet valves (Otto cycle), Wankel engines operate on the four-stroke cycle (suck-squeeze-bang-blow). This Wikimedia animation succinctly describes it: The rotor seals off the air/fuel intake charge from the intake port, gradually compressing it until it is sufficiently compressed, at which point the spark plug ...


3

Yes, absolutely. Can you port tune a Mazda 13B on your kitchen table with a dremel tool? Yes. I've done it. Better said, I tried it. Can you expect the apex seals to last any time at all using "free" instructions from the internet? Not a chance. I'm sure there's plenty to be gained, but I doubt nearly as much as an Otto cycle due to the speed and ...


2

With a rotary engine, (the Mazda 13b specifically in my explanation) there exist two rotors that spin about the eccentric shaft. The rotors are typically arranged so that when the front most rotor is in a position where the apexes are facing (N, SE, SW) respectively, the rotor behind would be positioned where each apex is (NW, NE, S) (using compass ...


1

I couldnt help but notice,the much bigger rotary "piston" surface/per amount of fuel, was being somewhat overlooked in these other answers considerations. It might be a compensating factor in efficiency to some degree. Rotary engines are supposed to use hydrogen and probably hydrocarbon gases such as methane, more effectively than a piston configuration ...


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