flywi@ns1.northnet.net wrote:
>
> John,
>
> You wrote:
> "At start up with 20-50 oil the pressure is at 90lbs.
> After 50 miles, at idle the pressure is maybe 15lbs acording to the
> dash gauge. Idiot light never comes on. The engine shows no sign of
> excess wear no unusual sounds, and the sparkplugs are clean."
>
> You may not have any problem at all. My car has a TRF shortblock with
> about 3000 miles on it. It has an oil cooler, electric fan, and rebuilt
> head. My oil pressure after a good drive (30 miles or so) indicates
> about 12.5 lbs. when idling at about 700 rpm and runs just over 50 when
> driving. The owner's manual indicates the pressure should be 45 to 60
> lbs at 2000 rpm and may drop to 25 lbs. in competion type use.
>
> What is your pressure while your driving? What is it at 2000 rpm? Does
> it go right up when you bring the engine off idle? What does your temp
> gauge indicate? Mine runs at half when cruising and climbs to the second
> to last mark when fully hot and idling at a stop light. This is with a
> fresh change of Castrol 20W50, a Fram spin-on filter, and oil cooler.
>
> I wonder what other people are seeing for idle oil pressure and
> temperatures.
>
> I hope these observations help alittle. I wouldn't be too quick to start
> fixing a problem that may not exist.
>
> Kerry
> tr66pack@aol.com
I'm glad this came up.
My 76 TR6 is stock except for electronic ignition, electric fan,
stainless steel exhaust and Lucas 20kv coil. I'm using only my dash oil
pressure and temperature guages. At startup the oil pressure is over 50
and approaching 75 when rpms are above 2500 or so. After running
awhile, it appears to taper off below 50. I'd guess about 40 PSI. This
is particularly true when I take the highway to work and cruise at 65 or
70 for 10 to 15 miles. The temperature gets up to the three-quarter
mark in traffic, but stays a little above half on the highway. When I'm
moving on back roads with occasional short stops, lots of shifting and
varying speeds and rpms (our favorite driving) the oil pressure stays
around 50 at @3000 rpm and the temperature stays a little below half.
The car responds and runs very well in any of thses situations however,
so I've decided this must be normal...
Bill S.
76 TR6
Raleigh, NC
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