i have a built 26 with a trust oil pump and recently installed a just jap oil cooler and connected my defi gauge senders up.
oil pressure is good driving normally, but when i boot it, oil pressure stays above 6 bar until it reaches about 6500rpm and falls to about 3.5 bar by 8000rpm.
rev limiter is set at 9000rpm so would probably drop below 3 bar by then
i also have fresh oil in there, castrol edge 10w-60
thanks,
luke