Danmn858

iTrader: (10)

if you honestly dont think that I know that an oil cooler cools oil you're the pathetic one. I was just saying I don't know the exact mechanics of it. Obviously I know oil has to pass through it to be cooled.

RX8Soldier

iTrader: (24)

9krpmrx8

iTrader: (46)

The factory coolers are very good, the only downside is in cold weather. They have crappy thermostats and allow cold oil to flow and so it takes a while for the oil to heat up (not good). A good oil thermostat is going to allow the oil to heat up quickly by sending it back to the engine and going to a simpler hose routing with larger lines increases oil pressure (proven by me). The factory lines and fittings are know to rust and leak in winter climates and replacement parts are very expensive unless you find a part out going on at the time you need a replacement. Custom lines and fittings are generally cheaper unless you go with top notch stuff.

It's not something to do on a whim, it needs to be carefully thought out.

Danmn858

iTrader: (10)

This is good information.

olddragger

iTrader: (3)

Good advice 9K. peeps --dont overcool the oil either. Most track driven RX8 will hardly put a load on the engine until the oil temps get to 160F+. If you use synthetic oil it is good to go to 250F+ as far as lubrication is concerned.

Danmn858

iTrader: (10)

super thread revive time!
Would you recommend Mishimoto oil coolers? I've seen them on various built stance:nation cars so I assume they can't be horrible.
also how many rows would you suggest if I'm doing dual oil coolers?

olddragger

iTrader: (3)

thread revival........
I would like to take this discussion a step further.
My reason---serious engine builders including racing beat mazmart , pettit--etc will tell you to not let the oil temperature get above 200-205 F. THIS IS MEASURED ON THE COOL SIDE__returning from the coolers.
Unless you live in a cool climate-- i will venture to say that the oil temps are above that routinely. Especially in the south. ALL the members of the Ga RX8 club see temps higher than that--on track and during city driving. Some see 200F even just driving on interstate during the summer time.
Now oil viscosity does influence oil temps. Most of us do use a 40 wgt oil--synthetics and mineral.

My point is --i think we need better oil cooling and what have others done?

before the summer ( in Ga) I plan to upgrade my oil cooling system ( currently stock with the vents cut and one cooling fan for stop and go traffic) . My system is borderline--the thermostats work fairly well as I see now ( winter months) a return temp of about 180F. But in the summer i can see 200-205 fairly often. On track I do see 220F often.
My coolant temps are well under control but the oil needs a little help?
Is this something that needs addressing or is this another olddragger ramble?

9krpmrx8

iTrader: (46)

Well we will see this summer at full boost but for now I struggle to get temps well above 200F and that is with oil flowing thru the turbine housing.

Honestly man when I was measuring temps in the oil pan there was not a huge difference in temps versus measuring it at the oil filter plate.

Hoss-05 is plumbing in a cooler with a fan on the oil line that feeds his turbo. I am curious how much that will extend the life of his turbo along with his use of Evans coolant.