Archie Frangoudis wrote:

It is my impression, from what I have read, that this is a new
engine design. Is this correct?
Archie

Me thinks it is the side exhaust port version. They also upped the revs
to about 7000 to 7500 and 225 HP normally aspirated.
The side exhaust ports have more area than the stock peripheral
exhaust port yet they have no overlap with the side intake ports.

As a result low speed misfires have been all but eliminated.
Those low speed misfires were causing high unburned hydro carbon
numbers.

I have a SAE paper on the engine so I will re-read it and see what
other changes they made.

What worries me (and I guess I am just a pessimist) is Ford may
have had input on materials and may have changed the eccentric
shaft material to cast iron. I hope not but an aftermarket
shaft is no big deal.

Wankel gmbh in Germany uses a hollow tubing  hydro formed e shaft.
Can you say light weight? Makes more sense than cast iron
as it can be 4340 tubing heat treated shot peened and nitrided.

Since they just revised the RX7 last year in Japan I don't
think there will be a new one. The four door sedan is
my guess since the guy that told me that a few months ago
and commented recently on here has an in with Mazda.

Paul Lamar
 
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