Ash content corrolations to Pre-Ignition

[Barry Bordes]

Originally Posted by vex

8 cycles on a single rotor test bed. Just because you have a pre-ignition event does not mean you'd have a catastrophic pre-ignition event.

As for speculation on why the ash causes pre-ignition events it's nothing more than a few ideas being passed around. As it stands right now the Pre-ignition is a direct result of ash because of carbon build up on the combustion surfaces. The carbon build up carries over heat causing the pre-ignition event where the gas reaches its flash point with contact to the surface. But that's just a theory.

Vex and Joff,

In the NSU paper linked above, the engineers were finding engines being destroyed after high speed runs on the Autobahn. Their conclusion was preignition for metal ash deposits on the rotors.

The good news on the Valvoline VR1 is that I found it a O'Reilly's so it may be a other automotive stores also. They only had it in 50W and 20W50. It comes in 10W30 and 10W40 also.

Barry

[vex]

Originally Posted by Barry Bordes

Vex and Joff,

In the NSU paper linked above, the engineers were finding engines being destroyed after high speed runs on the Autobahn. Their conclusion was preignition for metal ash deposits on the rotors.

It's been a while since I've looked at the NSU papers, do you have a page to the conclusion that declares the ash deposits on the rotors as being the cause? I was thinking it would have been a combined effect of the plugs and combustion surface.

The good news on the Valvoline VR1 is that I found it a O'Reilly's so it may be a other automotive stores also. They only had it in 50W and 20W50. It comes in 10W30 and 10W40 also.

Barry

Is it classified as fully synthetic, or is it a highly refined conventional?