When do you "burn valves" or "Hole pistons&qu

For discussing MicroSquirt (TM) configuration and tuning of fuel parameters (including idle valves, etc.).
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Philip Lochner
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Location: South Africa

When do you "burn valves" or "Hole pistons&qu

Post by Philip Lochner »

I've heard many times it being stated that going too lean could cause "burnt valves" and/or "holed pistons".

I've been leaning out my car under lean cruise conditions and feel that I could lean it out even more but I'm a bit worried that I could be causing this type of damage by going "to lean".

Does someone have a feel / guideline as to where leaning out would get one close to the above hazards?
Kind regards
Philip
Land Rover Discovery '95 4.6 V8i MS-2/V3/2.36/LC-1/EDIS
Jaguar XJS V.12 5.3, MS-2(2.686t11 - Dual table)/Dual LC-1/MSD6A/spark(VR/dissy)+fuel(LoZ+PWM)
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jsmcortina
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Joined: Mon May 03, 2004 12:34 am
Location: Birmingham, UK
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Post by jsmcortina »

This usually only happens under full throttle conditions - under cruise you are in low load. I run my Rover at 15-16 AFRs during cruise and it seems fine.
The abuse I give it on the drag strip is what will kill it.

James
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