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#4675823 - 02/23/18 07:20 PM Mazda’s new Renesis and Premacy engines.
PimTac Online   content

Registered: 03/04/17
Posts: 4324
Loc: Soviet State of Washington
A good read on Mazda and their work on a updated rotary engine that uses hydrogen or gasoline for fuel. They also have plans to implement this into two hybrid platforms.
2017 Mazda CX-5 Grand Touring

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#4675970 - 02/23/18 09:50 PM Re: Mazda’s new Renesis and Premacy engines. [Re: PimTac]
Bladecutter Offline

Registered: 02/21/11
Posts: 1452
Loc: Dacono, CO
That article is really, really old, and Mazda has long since decided not to use that technology in anything, period.

2014 Mazda CX-5 Touring (Soul Red)
2015 Porsche Cayman
2007 Ducati 848
1988 Honda Hawk GT

#4676032 - 02/23/18 11:29 PM Re: Mazda’s new Renesis and Premacy engines. [Re: PimTac]
Linctex Offline

Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Rotary / Wankel engines are a novelty to me, and nothing more.

I have always wanted one as a plaything, but they just aren't very practical.
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

#4677396 - 02/25/18 09:16 AM Re: Mazda’s new Renesis and Premacy engines. [Re: Linctex]
fdcg27 Offline

Registered: 09/25/09
Posts: 15708
Loc: OH
I know of an RX-8 I can buy for probably less than 6K, since when I threw that number out the owner said that was doable.
The car is pretty nice overall and is on its second engine at around 120K. It is a stick. A little tempting since a Wankel is something everyone should own at least once, just like a diesel, although Rudolph's design ideas proved a lot more fruitful than those of Felix.
17 Forester 12K MSS 0W-20
12 Accord LX 86K PP 5W-20
09 Forester 95K M1HM 10W-30
01 Focus ZX3 118K PP 5W-20
96 Accord LX 104K T5 10W-30
95 318i

#4677491 - 02/25/18 10:38 AM Re: Mazda’s new Renesis and Premacy engines. [Re: PimTac]
SteveSRT8 Online   content

Registered: 10/10/08
Posts: 18958
Loc: Sunny Florida
I owned both an RX-3 and an RX-4 back in the 70's. The RX-3 chucked its apex seals at 70k miles and was sold, the RX-4 was a monster that would not die.

Took money from many V8 powered cars with the 4, it was truly gnarly for a little 2 door, easily revved way past redline and never faltered until I sold it.

Really too bad, a stated above everyone should at least own one for a while...
"In a democracy, dissent is an act of faith."
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#4684580 - 03/04/18 08:45 PM Re: Mazda’s new Renesis and Premacy engines. [Re: PimTac]
artificialist Offline

Registered: 09/23/07
Posts: 8598
Loc: Florida
I knew 2 people who had an RX7TT, and they said it was the most expensive car to repair, but it was so much fun that they felt it was worth the money.

The Renesis engine changed the location of ports so that it would meet California smog, but they only sold that car for a few years. In many cases, the engines didn't last long enough.

I suppose GDI could be used to solve the overlap problem which leads to smog, but the engine still has several weaknesses that prevent it from becoming common.
2010 Lancer Ralliart Sportback