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Paul, if they have an automotive background, they may have never been exposed to high power LOP. I clearly remember the first time I was. In the late ‘80’s I was doing consulting work for Pontiac Motor Sports on their IMSA GTP cars. We got the fuel injection stuff from Cosworth and they suggested we run LOP at max power for fuel economy at Daytona. My reaction was….Are you @*&% crazy….you must be kidding! Craig Berland The slide was clearly "LOP" and I got the impression they are savvy enough to understand the difference you mentioned below. I just did not have time to address the issue with them, but I have his card so I'll ask what Tempest means. Paul Miller On 2012-02-20, at 11:32 AM, Craig Berland. wrote:
“There was one slide that showed a badly eroded massive and it was blamed on "severe LOP operation” Let me take a stab at this. I suspect what they said or at least meant was, the badly eroded electrode was caused by severe detonation as a result of lean operation. What I mean is, if you are at high power and 300-400 degF Rich of Peak and you lean to 50degF Rich of Peak, you are in what I would call a severe engine operation zone caused by leaning. That is, you are way too lean for Rich of Peak operation at high power. If you continue leaning to 60-100 degF Lean of Peak, you are what I would call a pilot with good engine mangagement skills. By continuing the leaning process you reduce peak cylinder pressures and therefore peak temperatures. The likelihood of detonation increases as temperature and pressure increase. By leaning to 60-100 degF LOP, you significantly reduce the likelihood of detonation from the 50 degF ROP setting. |
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