Mazda rotaries. Pre mix and octane reduction

[md4etal]

Jim Downing who won numerous IMSA titles with a rotary just used premix.
The pumps would fail at high rpm.  If you talk to the people at racing beat
in California, they may be able to guide you.  Of the three book on rotaries
I have read, they all stated that rotaries are relatively insensitive to
octane when compared with the piston.  It must have something to do with the
dramatically different combustion chamber shape, and the dual ignition.

If you do use a premix, tend toward the synthetic type, they leave less ash
in the engine.

Say, what oil pressure you running in the main lube cirucit?  Let me know
off list.

Mike D. (the long name one)
----- Original Message -----
From: "Chris Wilson" <chris at formula3.freeserve.co.uk>
To: "Kurt Heintz" <diy_efi at diy-efi.org>
Sent: Sunday, July 15, 2001 6:40 AM
Subject: Re[2]: Mazda rotaries. Pre mix and octane reduction


> Sunday, July 15, 2001, 10:29:47 AM, you wrote:
>
>
> > I personally would use the mechanical Mekuni dosing pump. Because with
the
> > premix oil about 90% of the oil does not come where it is used.
> > The oil is sputtered so finely by the injection nozzles that it burns
with!
>
> > Best regards, Kurt Heintz
> > http://www.der-wankelmotor.de
>
> Is the Mekuni (Mikuni <SP>) an aftermarket pump, or the one used on the
> earlier engines? I blieve a front cover from an early engine is needed
> too? Or a stock cover modification? Why did the 3rd gen go to electronic
> metering control, emissions? Thanks for the info, learning about these
> engines slowly :-)
>
> --
> Best regards,
>  Chris Wilson
mailto:chris at formula3.freeserve.co.uk
>                                        http://www.formula3.freeserve.co.uk
>
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