Mazda rotaries. Pre mix and octane reduction

[Seth Bibler]

Sorry for the late reply, but...

> 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.

Yeah, well Mazda uses one on their 4 rotor 787B engine.  That engine was power
tuned for sub 10,000 RPMs though... and the pump is attached to a Dry sump
setup.  Still, if Mazda is using it...

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

I'm running 95psi, but that's because I have a ported oiling system with
3-window main bearings.

The stock pressure is fine for normal bearings.

Seth


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