I'm running an 1100 with a 731 cam and 1-1/2" SU with KMX oil and 'hard driver' filter.

When cold it idles around 70PSI - give it a rev and it goes to around 85PSI. It takes probably 20+mins at idle to get warm.
When warm it idles around 40PSI with regular driving around 60PSI.
While doing a test run through the hills today I noticed at around 100kph I was hitting over 80PSI and when I came to idle after this it was as low as 20PSI.

What is the normal PSI? Do these sound OK?

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Justin

Sounds spot on to me, thats how mine behaves.

If you ever do have suddenly strange readings it's worth checking the oil pressure relief valve. Mine was getting stuck sometimes. If it stuck closed it would send the gauge to 100psi and stuck open = low pressure.

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68 Morris Cooper S Mk1 (*ex 78 1275 LS 4th last built, 70 Morris 1500 OHC & 70 MiniMatic)

Cool - thanks. I was hoping it was OK because it runs just fine .

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Justin

what about htis when started cold it runs about 80 psi when running along a straight its about 40 but at idle when warmed up 15 is that to low

Not disastrous, but it sounds to me your oil pump is probably looking forward to retirement, that's assuming your bottom end (bearings) are all OK.

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1967 Cooper S - new front bearings to do.
1965 Cooper S shell - Slow progress. No time or money!
1966 Deluxe- next rustoration!
Mk 2 & XJ6 Jags. Less said the better.