Originally Posted By: Virtus_Probi
Originally Posted By: TKFD
Got another question about oils for my engine. At the moment I am running 10W-40 full synthetic high ZDDP oil (Penrite racing). After a hard run oil temps get to around 100degC and pressure drops from around 300kpa/44psi(warm) to about 200kpa/30psi (hot) at idle (1000rpm). Sometimes it drops a bit under 200kpa if I come straight off the track and let it idle and just sets off the low pressure 20psi warning light. It quickly restores after a cool down, and I have an oil cooler and on the cool down lap it drops quite a bit, so cooling is working. Ambient temps during cold months range 5degC - 20degC
Anyway, for the hotter summer months I am thinking using a heavier 15W-50. What do you think ?
When cold at first start up it sits around 350kpa/50psi, when warmed its sits around 300kpa/44psi, and then of course hot after a run can drop to about 200kpa/30psi as stated. This is all at idle @1000rpm. Of course press goes up as rpm increase.
50psi at idle is still decent oil pressure, and the oil temp quickly recovers on cool down lap, so I don't think I have a problem or anything, its more extra protection during the hot summer months. My only concern is going to heavy, but I guess when it reaches higher op temps it wont matter.
Thanks for any advice and guidance
I am posting this from a position of almost complete ignorance, but I happened to see a guy on a Forester website selling something called an oil accumulator yesterday and poked around trying to figure out what it was. Seems like it is an extra oil reservoir (this one was 3 quarts) that uses compressed air to raise the system oil pressure when it dips and is then recharged when the system pressure rises naturally from higher RPMs.
I have never heard of somebody using one and would imagine it would add weight that you wouldn't want in a racing vehicle, but I thought it was worth mentioning here.
Cheers!
Just adding that those are very common on off road rock racing buggies for keeping pressure while facing straight up or sideways...
http://www.pirate4x4.com/tech/billavista/Oiling/#accumulator
Stuff like this:
https://youtu.be/d7BhWqTEyfY