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Old 11-01-2015, 07:59 PM   #176
left footed whooten
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Who let all the facts into news and rumors? Good show.
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Old 11-01-2015, 08:11 PM   #177
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It's been over ten years since I really frequented it, but yeah; the absolute best thing about rx7club to me was the incredible amount of technical information available on there from the community. No other car forum I've come across since quite compares on that front. A lot of people there really know their ****, I think because it's such a small and close knit community and a lot of the posters there run shops or otherwise work on their own engines. Awesome forum.
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Old 11-02-2015, 09:43 AM   #178
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Quote:
Originally Posted by arghx7 View Post
It's common to put two stroke in the tank. That's not a viable solution for mass production of course. Mazda has to make a "normal" engine in that sense.
Thanks for all that. I knew they changed injection locations in 2009, but I didn't realize they changed the entire operating principle of the injection system.

Indeed pre-mix is common in racing but obviously not practical for a production car, and it's not just the owner logistics of having to mix oil with the fuel. In a racing situation (like Star Mazda) the operating envelope is very narrow so the oiling ratio can be basically constant and premix works fine, but in a street car which will cruise on the highway at 25% load and also might see a track day, variable ratio oiling becomes a necessity. Then there's plug fouling/cold starts to worry about.

I think though that SCR systems in diesel cars have shown that normal consumers are willing to accept an auxiliary consumable in a separate tank. The Japanese tend to be much more focused on usability than the Germans, but I would think that philosophy would have some flexibility in a sports car. Which leads me to the idea of two stroke oil in a separate tank. The aircraft rotary guys do this as do a fair number of street RX owners. I'm not totally up on the issue, but I believe owners who've converted to two stroke oil injection generally report less carbon buildup in addition to the potential durability benefits.

But that hinges on the idea that two stroke oil is superior to PCMO as an injected lubricant. I don't doubt that some PCMOs work fine, but I doubt they work as well as the best two stroke oils, and you've got the problems of evolving standards and chemistry in PCMO which don't really take the needs of the rotary into account. With PCMO Mazda has to either write their own standard for rotary oil and then admonish their customers to use it exclusively, or they have to do extensive testing on different oils and hope the chemistry doesn't evolve over time in a direction detrimental to the rotary. If they write their own standard, they now have the logistic issue of availability. Mazda has advised owners to avoid synthetic oils in the rotary for a long time, but that advice was always difficult to understand. I suspect there are reasons not to use Group IV/V oils due to their high temp properties, but such oils are generally not distinguished from Group III synthetics in the marketplace.
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Old 11-02-2015, 10:58 AM   #179
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As long as it isn't a large amount of oil being used I don't think consumers would have a problem putting a liter or two in a reservoir every 3-5k miles.

You have to do the same with Urea. its not ideal but I think more acceptable on a dedicated sports car than a traditional family car like diesels.
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Old 11-02-2015, 11:45 AM   #180
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Quote:
Originally Posted by Genericuser1 View Post
As long as it isn't a large amount of oil being used I don't think consumers would have a problem putting a liter or two in a reservoir every 3-5k miles.

You have to do the same with Urea. its not ideal but I think more acceptable on a dedicated sports car than a traditional family car like diesels.
It would be a good approach IMO to do just llike the urea fill and offer it in the fuel door. Keeps it in your mind, but not in your face and is otherwise convenient.
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Old 05-23-2020, 06:00 AM   #181
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Default Racy new Mazda RX rotary coupe revealed





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Racy new Mazda RX rotary coupe revealed - motoring.com.au


Will the latest Mazda RX-Vision make the step from concept to reality?

Five years after the sleek Mazda RX-Vision wowed crowds at the 2015 Tokyo motor show, the Japanese car-maker has teased us with yet another rotary-powered coupe concept.

This time, however, it’s purely virtual and it gets a much more aggressive design to take on the world’s top-flight GT3 race cars.

While Mazda is yet to confirm a production version of either RX-Vision concept, gaming fans are now being treated to what a hard-core GT3 race version would like – and it sounds like an F1 car on steroids.





Created alongside Polyphony Digital, the computer-generated Japanese super-coupe is purely for Gran Turismo Sport gamers, who can now download the Mazda RX-Vision GT3 Concept racer via their PlayStation 4 console.

According to the creators of the game, the lightweight sports car – which we’re still hoping will one day become reality as Mazda’s born-again rotary performance flagship, possibly badged as either the MX-6 or RX-9 – is powered by a mid/front-mounted SKYACTIV-R quad-rotor engine delivering 425kW and “unprecedented performance”.

The Mazda RX-Vision GT3 Concept comes complete with a slew of aerodynamic enhancements, including a huge rear wing, protruding front splitter and a large air duct across the bonnet, and is said to have 48/52 front/rear weight distribution.

Mazda says players competing in the RX-Vision virtual racer will automatically be granted seed rights to participate in the FIA-certified Gran Turismo Championship, held in various locations around the world during the 2020 season.

In celebration of Mazda’s centenary this year, it will also host two special events on the PS4 game, including the ‘RX-Vision GT3 Concept Time Trial Challenge’ and the ‘RX-Vision GT3 Concept Livery Design Contest’, the winners of which will be awarded special prizes.

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Old 05-23-2020, 06:01 AM   #182
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Continued from above post

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Old 05-23-2020, 10:15 AM   #183
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That’s hot
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Old 05-23-2020, 10:40 AM   #184
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Would be cool if they would get off their arses and bring back the RX7.. given it's not slow like a BRZ and can compete with the Supra and upcoming (?) 400Z..
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Old 05-23-2020, 10:58 AM   #185
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I mean, they're REALLY small and trying to make money to survive at this point. I don't see this being available anytime soon. Maybe in 6-10 years.
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Old 05-23-2020, 12:19 PM   #186
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So this is Mazda's take on the AM Vulcan... if this sees the light of day, would seem more feasible to be powered by a TT Skyactiv inline 6. Would be easier (and less costly) IMO than trying to make one with a rotary engine under the hood.
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