Oil Pressure and Temperature Guide Video

[ajc209]

TMG list the oil cooler as optional. I this running a thicker oil is the way forward. TRD japan also recommend a heavier oil.

Cirtainly a 10W60 will keep pressures up!! It might be okay for me to use a 10W40 as my car is garaged and generally comes out with oil temps greater than 0C.

The oil pump is fixed flow (except when pressure relief is open). Pressure is determined by resistance in the system. More resistant (for example smaller bearing clearances) with give more pressure but the pump will guarantee flow unless the relief valve is active.

[churchx]

offtopic
@bur****jp: thanks for linked doc. I noticed many interesting bits in that document. Like race ecu update, Thermostat opening temps, diff final gear ratios, diff oil cooler, custom headers & twin pipe catalysator exhaust system which is homologized (wonder if it's street legal on stock twins?), lightweight windows, billstein shocks, specific rollbars/struts and so on .. wondering if something from that can be ordered/fitted on our cars especially exhaust system/ecu..

[steve99]

Originally Posted by churchx

offtopic
@bur****jp: thanks for linked doc. I noticed many interesting bits in that document. Like race ecu update, Thermostat opening temps, diff final gear ratios, diff oil cooler, custom headers & twin pipe catalysator exhaust system which is homologized (wonder if it's street legal on stock twins?), lightweight windows, billstein shocks, specific rollbars/struts and so on .. wondering if something from that can be ordered/fitted on our cars especially exhaust system/ecu..

I dont think the ecu would be physically different, it will just have different rom to suit exhaust maybe some other tweaks, just need somone to pull rom from one of those with tactrix or similar device.

[Captain Snooze]

Originally Posted by rice_classic

The solution brings me back to the shim in the PRV

Is there a trade off with doing this? Too high a pressure when cold?

[ajc209]

Yes!

Pressures are quite high cold as it is really. At 100C on 0w20 it gives a perfect 10psi/1k so thicker oil is too a compromise....

[rice_classic]

Originally Posted by ajc209

Yes!

Pressures are quite high cold as it is really. At 100C on 0w20 it gives a perfect 10psi/1k so thicker oil is too a compromise....

You're right, however he was asking about pressure at cold. I can't answer this definitively. The reason is that on the cars where I've shimmed the pump, I've only witnessed a small increase in pressure at start up @ idle when cold.

A small shim (small pressure bump) and a 0w-30 may be an excellent compromise for double duty (track/DD) car. But shim or no shim, it's always, ALWAYS, best to let your car warm up before you rev it high or drive it hard.

[DustinS]

Things just keep getting interesting in the oil department.

I am interested how everyone is getting the oil so hot. I can drive around spirited in 80F and only hit 180F oil temp. I am seeing people hit 220F on their drive to work.

What I am reading is to bump to 0w-30, shim the pump, and watch temps/psi. Sound correct?

[Decay107]

Originally Posted by DustinS

Things just keep getting interesting in the oil department.

I am interested how everyone is getting the oil so hot. I can drive around spirited in 80F and only hit 180F oil temp. I am seeing people hit 220F on their drive to work.

What I am reading is to bump to 0w-30, shim the pump, and watch temps/psi. Sound correct?

Are you tracking your car? If not you don't need to do anything at all, stick with the factory recommended 0w-20 and enjoy years of trouble free reliability. Under track conditions it's pretty easy to push a stock car into the 280* range.

[subielife]

My car is a track car only. No oil cooler and it has been on track since it was 70 miles old. Currently has header, no cats and a Borla exhaust, intake, tune, suspension, all the usual sutff. Running 0-40 Castrol Edge I can guarantee that the oil will be between 248-257º, depending on ambient temp. Other BRZ/FRS guys see higher temps than I do, I have been doing this for a long time, I am not kind to my car. Oil pressure never drops below 50 psi. Will I spin a bearing eventually? Probably, but the car has 14,xxx miles so far and I just doesn't seem to care what I do to it. I might go up a grade on the next oil change to see what happens. I personally don't think doing 20 minute DE sessions under these conditions is doing much harm. Racing would be a different story.

[DustinS]

I plan on 2-3 track days this year, Auto-X (once I get weekends off), and many spirited "Canyon" Runs.

[sickmint79]

Originally Posted by DustinS

Things just keep getting interesting in the oil department.

I am interested how everyone is getting the oil so hot. I can drive around spirited in 80F and only hit 180F oil temp. I am seeing people hit 220F on their drive to work.

What I am reading is to bump to 0w-30, shim the pump, and watch temps/psi. Sound correct?

interested in thoughts and comments on my post in the forester oil cooler thread - http://www.ft86club.com/forums/showp...&postcount=474

the data is from multiple track events, i will note the above cruising on the highway i can get there, even with this oil cooler (vid in link)

[DustinS]

I actually found that my oil temp gauge(tapped into the galley plug) read anywhere from 20°-48°F cooler than my OFT reports. I cruise at 210°