FA20 Engine Oiling, Bearings, and Starvation

[Decay107]

Originally Posted by Dezoris

0w20 was tested with and without FI. Very similar results as pressures are relative to oil temps.

All other results are with oil cooler and FI.

Do you have any info on the pressure drop associated with adding an oil cooler? Probably not a lot but I don't think I've seen pressure data on a stock engine yet.

[BRZGM3]

Not sure if anyone has seen it yet. But holinger just posted on their facebook a drop in 6 speed sequential trans for the 86 platform. . . Probably 20k but still.

[keen as]

Originally Posted by BRZGM3

Not sure if anyone has seen it yet. But holinger just posted on their facebook a drop in 6 speed sequential trans for the 86 platform. . . Probably 20k but still.

from one of their facebook posts:


"As per our post from August the Bellhousing featured in this kit can be used on the SG series [365Nm (270ft.lb) and RD6 series [880Nm (650ft.lb)] transmission, so regardless of your Torque rating we will have a solution covered. The bigger transmissions of course would require some Tunnel modification. The SG featured here will handle any NA application and mild force-induction situations. When viewing the Torque-Ratings we give our products, bear in mind that these are for 24 Hour Endurance racing, with professional teams, drivers, race cars and slick tyres. It has been suggested that the SG could potentially be weaker than the stock transmission due to size etc. We can assure you that it is much more capable than the stock transmission! Don't be fooled by size and always take "Torque-Ratings" published cautiously. Our Torque-Ratings are not "Failure-Ratings" in any way shape or form! This is not what you can say about most transmission companies........"

[blown]

thoughts on running 10w60?

[Reaper]

Originally Posted by keen as

from one of their facebook posts:


"As per our post from August the Bellhousing featured in this kit can be used on the SG series [365Nm (270ft.lb) and RD6 series [880Nm (650ft.lb)] transmission, so regardless of your Torque rating we will have a solution covered. The bigger transmissions of course would require some Tunnel modification. The SG featured here will handle any NA application and mild force-induction situations. When viewing the Torque-Ratings we give our products, bear in mind that these are for 24 Hour Endurance racing, with professional teams, drivers, race cars and slick tyres. It has been suggested that the SG could potentially be weaker than the stock transmission due to size etc. We can assure you that it is much more capable than the stock transmission! Don't be fooled by size and always take "Torque-Ratings" published cautiously. Our Torque-Ratings are not "Failure-Ratings" in any way shape or form! This is not what you can say about most transmission companies........"

This has been covered many times in multiple threads already

[Reaper]

Originally Posted by blown

thoughts on running 10w60?

That scares me. 10 w 40 seems to work real well. Someone tested 50w and if I remember correctly oil temps went way up. I just see there being enough bearing clearance for that.

[Element Tuning]

Pretty much get it out of your head bearing clearance or any motor clearances in this engine limit the viscosity you run. Trust your oil pressure gauge as it does not lie or have an opinion

Stay away from widespread oil viscosities because they aren't as stable at high temps. I have tested them without very good results. This is due to the polymers they have to add. I run Red Line 50w Race for what it's worth.

All coolers have some pressure drop but that drop is offset by the cooler oil having more viscosity at a lower temp. Remember viscosity is rated at 100c only!

[Reaper]

True^

[sw20kosh]

Originally Posted by Element Tuning

Pretty much get it out of your head bearing clearance or any motor clearances in this engine limit the viscosity you run. Trust your oil pressure gauge as it does not lie or have an opinion

Stay away from widespread oil viscosities because they aren't as stable at high temps. I have tested them without very good results. This is due to the polymers they have to add. I run Red Line 50w Race for what it's worth.

All coolers have some pressure drop but that drop is offset by the cooler oil having more viscosity at a lower temp. Remember viscosity is rated at 100c only!

Widespread meaning... something like 10w30? 10w40?

[Calum]

Originally Posted by sw20kosh

Widespread meaning... something like 10w30? 10w40?

More like 0w40, from earlier in the thread.

[Element Tuning]

Originally Posted by sw20kosh

Widespread meaning... something like 10w30? 10w40?

No. Like just mentioned a widespread would be 0w40, 5w50, 10w60, etc. Better would be 10w30, 15w40, 20w50, and the best would be straight weights like Red Line 30, 40, or 50 as they are more stable at very high oil temps (they flow like regular multi-grade oils when cold however).

[kiichiro]

Originally Posted by Element Tuning

No not really. You have to remember the FRS/BRZ is an NA car and it's oil pressure is enough for that so there are no issues handling that power level. The 2015 WRX has much more power and the oiling system is barely better. Both are just adequate enough for +75 HP bump or so.

You stopped us from looking at the wrx. Thanks.

[mike the snake]

I'll be switching to 30wt Motul or Redline on my next change.

[Element Tuning]

Originally Posted by kiichiro

You stopped us from looking at the wrx. Thanks.

I feel like the STI stuck with the EJ because of the limits with the oiling system used for the FA currently. I'm sure they'll work it out in time but hopefully they don't just make it adequate for oem power levels.