05-28-2017, 12:05 PM
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CC Member
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Join Date: Jun 2004
Location: Leicestershire,
UK
Cobra Make, Engine: Kirkham #523, 427 S/O
Posts: 1,137
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Not Ranked
Unusual Oil Pressure
We've just been out for a run in the Cobra and I noticed that the oil pressure was dropping off as the revs fell and at tick-over, it was down to 10-15psi and it's never done that before. It quickly rose again as the revs increased and was at around 80psi at 2,000rom upwards. However, even that was inconsistent as sometimes it would be at 90psi and at others 60psi.
It has always had strong and consistent oil pressure, typically around 90psi and maybe dropping to 70psi at tickover.
I've checked the oil level and it's right in the middle of the acceptable range.
I've read various threads suggesting that pressures as low as 8psi is okay at tickover on an FE, but it isn't normally anywhere near that low on my engine, so something has changed. Oil temperature was around 170 degrees F.
Can anyone shed any light on what might be happening? 
Paul |
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