George Lendich wrote:

Paul,
I must admit that I came to the same conclusion as Bill Jepson. I spent a
lot of time riding around the mountains of the USA up to 12,000 ft and may
be more. I don't think anyone would design a car that wouldn't go beyond
8,0000 ft. ( speaking of the metering pump).

I think that we will have to take that bit of info on board and somehow
check it out, does anyone have a flowmeter on their metering pump lines ?

Perhaps that's one thing Doug from Japan can check-out!

George  (down under)

Well I think I heard him right. God knows I would be the last one to

defend him :)

Could be the Mazda engine is unique in it's installation of the motor

cycle metering pump.

There is little or no "head" on the oil feeding the pump. I think they

changed

that in the RX8 engine.

Take a look at these shots of the inside of the RX8 front cover.
The complicated chamber looks like an oil reservoir for the metering pump.

Paul

Paul, That comment just doesn't make any sense. The oil pump would have

to work on any road the car could access. the motorcycle manufacturers don't
limit

2-strokes to a max of 8K feet! The pump used is the same. There are

paved moutain passes in california well over 10,000 feet. Does the pump just
stop working?

I am getting more and more disturbed by some of the comments attributed

to Atkins, (if true), I would be bothered enough by some of the comments to
avoid

using his services.
Bill Jepson

     Dave Atkins claims the apex seal oil metering system does not work

over

     8000 feet. He also claims the engine will run up to three months
     in automotive service with no apex seal oil whatsoever. We have

some verification

     of that as George Graham flew his airplane from Tennessee to New

York

     state while forgetting to mix two cycle oil with the fuel.

     Paul Lamar

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