02-07-2018, 12:31 AM | #729 |
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What a good thread this is. So much information, thank you so much!
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02-28-2018, 10:23 PM | #730 |
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Has anyone seen the most recent Engine Masters episode regarding oiling (How Oil Kills Power)? Apparently they resolved high rpm oil pressure loss (and corresponding power loss) by simply reducing the overall volume of oil in the system. Of course it's more complicated than that, but I thought I'd throw this in to get this discussion going again.
I realize that most of us have chalked up high rpm oil pressure loss to cavitation on the part of the oil pump. Just want to confirm that turbulence due to excess windage at high rpm has been ruled out. Pls no flames. Honest question. Thx! Here's a link to the video. It's a pay site so it may do you no good until they post the vid on YouTube. https://www.motortrendondemand.com/d...r-/0_iqs4grke/ @ Last edited by Williampreza; 03-01-2018 at 01:37 PM. |
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03-01-2018, 03:55 AM | #731 | |
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03-22-2018, 10:19 PM | #732 |
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Thanks for making this thread.
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05-08-2018, 12:00 PM | #733 |
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Quote:
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05-08-2018, 12:26 PM | #734 | |
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Quote:
Sent from my ONEPLUS A5010 using Tapatalk |
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05-13-2018, 11:20 PM | #735 |
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Anyone know if it's ok to use the newer smaller hole rocker posts on the older 2012~13 heads?
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05-14-2018, 01:50 AM | #736 |
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05-14-2018, 08:49 AM | #737 | |
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Quote:
https://parts.toyota.com/p/Scion_201...U00306140.html |
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06-01-2018, 07:13 PM | #738 |
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There are references in this thread to the Reimax pump not helping solve the oil pressure at high revs/temps.
Reimax make two models. One is a drop in replacement and the other has a thicker gear, a spacer and needs some machine work done to the timing case cover. This is apparently a higher capacity pump. Which one is being referring to in this thread? Has anyone put in oil restrictors in the heads to ensure the crank gets priority? |
06-08-2018, 09:57 PM | #739 | |
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All most all in this thread that bought the Reimax replacement gears didn't follow through with results. IIRC only the replacement oil gears were available at the time. Element Tuning used the oil pump and timing cover from the FA20DIT (15+ WRX) and ruled it out due to issues with tuning.
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06-11-2018, 10:50 PM | #740 |
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There are new Reimax gears, I only know of one person that's going to actually use them properly though: http://www.ft86club.com/forums/showthread.php?t=13157
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06-12-2018, 02:19 PM | #741 |
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Been a long time guys since I've been on any forums but I'll revisit some results.
The Remax gear was worse than OEM for us. The design resulted in lower oil pressure in the peak TQ areas and that's bad on turbocharged cars as the oil pressure did not ramp fast enough. I have one for sale if anyone else's testing showed differently. The calculations originally done did not factor in the OEM gear having nearly two pumps per peak tooth profile. The FA20DIT cover has a larger oil pump (I believe it was 14mm vs 12mm of the BRZ). Because we have the Nemesis EMS stand-alone we could run that pump on our race car even thought the cam position sensors are not in the same location. Testing showed an improvement but it wasn't enough to solve the lower than ideal pressure on a boosted and raced BRZ FRS. We also tried external dry sump pressure stages from in 3 different sizes and from 2 different manufactures. I was optimistic we could put together something to sell people that would be a bolt on solution. Frankly that project left me scratching my head as we weren't able to produce more pressure than we got from our Pro Comp engines using the oem pump. Ultimately our Pro Comp FA20 long block build was the only thing that worked. I really wanted to go back and try and figure out why the external pressure stage that was a fail but unfortunately the FRS/BRZ aftermarket is a little soft on $$$$ mods. We wanted to do more for the platform but honestly without you guys spending the big bucks it's just not possible or I should say it doesn't make financial sense. There are plenty of products I had designed to further improve oil pressure, performance and reliability from the FA20 heads but market research pulled us into the Monster86 LS swap stuff. It's a little harder to develop and market products as our race car is sporting a twin turbo V8 now I loved my FA race car setup though but that transmission was just such a hold back. There are two game changer items however I may release but I'm waiting to see what Subaru does with the STi engines. Thanks, Phil Grabow |
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06-12-2018, 02:35 PM | #742 | |
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Our engine packages boost oil pressure by 20+ psi so we just aren't seeing the rockers eject on these older FA20s but I suspect "volume" to the pivot helps. On the new engines with the redesigned pivots there's no change in overall oil pressure unfortunately from what we've seen. I suspect this is the same for most as people are still sending us engines with spun rod bearings on the BRZ and also the WRX FA20DIT. |
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