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Mechanical Maintenance (Oil, Fluids, Break-In, Servicing) Everything related to the mechanical maintenance of the FR-S and BRZ |
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06-18-2021, 12:23 PM | #29 | |
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06-18-2021, 05:04 PM | #30 |
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Can someone explain what is cavitation? I think it's when air is introduced into the oiling system thus lowering pressure (air collapses). But why does this only happen when the oil gets hot?
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06-21-2021, 10:09 AM | #31 | |
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06-22-2021, 01:24 AM | #32 |
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My oil temp, I had to relocate my oil cooler so it’s 100% open, vented hood as well.. more
Air flow in & out.
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06-22-2021, 04:00 AM | #33 | |
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06-22-2021, 11:15 AM | #34 | |
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Just keep in mind, that every oil has a religion based on it and its believers will defend it to the death.
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06-22-2021, 12:39 PM | #35 |
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As Capt Spaulding said, there can be so much to consider if you want to dig into it. Skip to the basics - oil weight and a reputable brand. Another thing to consider is GF-6 oil came out fairly recently, so it could be useful to upgrade to the latest and greatest oil. It should always have a mark somewhere stating whether it is GF-5 or GF-6 rated. It's likely that most oils you see (especially online) are already selling the latest product, so no searching will really be necessary.
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06-22-2021, 02:40 PM | #36 | |
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https://www.canadiantire.ca/en/pdp/p...-0289329p.html Thank you. |
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The Following User Says Thank You to suppjc For This Useful Post: | Dzmitry (06-22-2021) |
06-22-2021, 09:34 PM | #37 | |
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06-22-2021, 10:49 PM | #38 | |
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Currently the best solution to avoid the drop in pressure at high RPM's is proper cooling. Whether it be an oil cooler or hood vents or a combination of multiple things, if you are able to keep your temps near factory spec for oil temps and pressures, then you should be avoiding the problem. Many have been trying to find other ways around it, with great potential, but nothing has fully resolved this problem with the twins - and I don't believe it ever will be resolved as it is more of a design flaw so to speak, rather than a simple part replacement to fix it. |
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06-23-2021, 01:19 AM | #39 | |
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I wish there was an easy way to add the WRX oil pump to our engines but it wouldn't work without a ton of modification, and it would exaggerate the cavitation issue. So it would not really be a solution unless you updated the whole system.
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06-23-2021, 07:52 AM | #40 |
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It's strange though as I have seen some members that has regularly track driven their cars go without issues for years. I seem to assume that most spun bearing issues are related to the valve spring recall rather than oil temp related. I am sure it's ideal for lower oil temps but I have also read that adding an oil cooler also reduces oil pressure negating the benefits.
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06-23-2021, 10:02 AM | #41 | |
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I would just like to improve it to help longevity.
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Last edited by NoHaveMSG; 06-23-2021 at 10:24 AM. |
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06-23-2021, 10:25 AM | #42 | |
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http://www.setrabusa.com/products/oi...ine/index.html Same for larger oil lines with gentler bends. The goal is that the oil cooler reduce temps to a large enough extent to more than off-set the small drop in oil pressures that it causes. A little spitball math here. The Setrab link above shows the pressure drop across a Setrab 613 is around 4 psi. In my experience, a typical front-mount Setrab 613 setup (Perrin, Racer X, etc.) will reduce oil temps by about 40 F on this platform. From the pressures shown on this link, that means a 613 will still add another 16-17 psi oil pressure at 7000 rpm (assuming 235 vs. 275 F oil temps). https://www.ft86club.com/forums/showthread.php?t=91820 So it's still adding a net benefit despite the fact that the Setrab 613 IMO is a pretty marginal setup on this platform (without doing something to increase its efficiency like a vented hood). From what I've heard, a well designed 19 row cooler can drop oil temps on this platform around 50 F.
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