I wish I could recall exactly where I found this info, apparently these mods
are what Mazda did for high performance engines.. Notice they actually
separated the tension rod housings/holes from the housing surface and
thinned everything in that area.


Dan Gorsline

This is a severe test. In my 40 years experience with Mazda rotaries  I have
never seen any of this cracking or black coatings this bad.
I have seen the steel liner melted through when run without
coolant until the engine  stopped. Steel melts around 2000 F as I recall.

BTW The ceramic apex seals survived to be used in another engine.

This includes turbo 2 rotor  650 HP drag racing engines.

Obviously they were using organic oil that breaks down around 250 F rather
than synthetic or two cycle oil.

Paul Lamar

=========================================================

On rereading this I realized this was not a Mazda production engine.
The chrome plating was applied directly to an aluminium rotor housings.
All Mazda production rotor housing have cast in steel liners.
Perhaps this was a Mazda custom racing housing.

Also I might add shocking the rotor housing with cold water
after a sustained high  RPM, high power period is close to imposable
to do with a real world cooling system and installation.
Two sources of cooling water must be available. One heated by the
running process and another cold coolant supply. Perhaps this is possible
in a boat installation.

Paul Lamar


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