Ash content corrolations to Pre-Ignition

[vex]

Originally Posted by NoDOHC

tell me if i am wrong, but wasn't that being compared to ATF and found to have half the wear?

If I interpreted the data correctly, 19.6 um/ 2.5 hours with only 1.5 mm allowable wear (8.0 mm stock, 6.5 mm allowed) gives about 200 hours (12,000 miles) before wear becomes a problem on a premixed rotary (which I really don't believe). Granted, this is full-throttle useage, but that number seems out there a little.

I have seen 150,000 mile rotaries with 6.9 mm of apex seal left.

I am not sure that these are 2.5 hour cycles.

I'll have to double check what the cycle times were for the endurance run. But yes, that was comparing ATF to Two Stroke.