A year or so back (I can't remember when exactly) I posted expressing concerns over my oil pressure once my engine fully warmed up. Well for various reasons I have only just found the time to install a proper oil temperature and pressure gauge, in fact this one http://www.spa-uk.co.uk/design/productdetails/?objid=130 but with the blue LED back light. The temp sender is located in one of the ports on this sandwich plate http://www.speedflowshop.co.uk/universal-full-bypass-oil-sandwich-plate---tvc60-1386-p.asp as is the stock pressure sender (i.e. pre-cooler and filter), whilst the new pressure sender is located in a 'T' from the OEM port in the block (which also supplies filtered oil to the turbo).
For reference I have an FM twincooler radiator with smooth bore PTFE lines connected by two 90 deg swept and two 45 deg swept -8AN fittings from this range http://www.merlinmotorsport.co.uk/GOODRIDGE-811-SERIES-%28Fuel-in-Car%29-811-SERIES-FITTINGS/c108_3256_3258/index.html?osCsid=eb1e2e7acfae944c3a26a9c4bd39eb41 Once the engine is fully warmed up (oil temp 89 to 90C) and the thermostat open I loose, depending upon rpm, about 15psi (difference between the stock sender and the new sender in the block).When the oil is cool the new gauge reads *roughly* 2 to 5 psi lower than the stock, peaking at about 75psi. Oil is Amsoil signature series 0w30. Here's the values on the new gauge fully warmed up: 950 to 1000rpm = 22 to 23psi. 2000rpm = 37psi 3000rpm = 42 to 43psi 4000rpm = 44 to 45psi 5000rpm = 47 to 48psi Those values, given the presence of the oil cooler, look acceptable to me? Any method (other than going to the expense of -10AN fittings) to reduce the pressure loss? What about the K&N oil filter range? Any thoughts on their claims of being free flowing and offering high levels of filtering? Steve. www.slowmx5.com
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