supraman95mb
Expert Class
Posts: 212
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posted February 26, 2003 08:30 AM
Oil pressure increase info
I read somewhere else where someone had added a washer to the relief valve in order to increase the oil pressure. Who has done this and can you tell me the exact size of washer and exactly where it is that I put it.
Thanks all.
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02 Stroked 12R
95 Supra Single Turbo 750+ hp
  
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kcadby
Pro
Posts: 1733
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posted February 26, 2003 10:12 AM
The washer won't raise the pressure everywhere (rpm) it only raises the MAX pressure...
Don't know what size the washer is...I don't do that mod...
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ra12r
Zone Head
Posts: 919
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posted February 28, 2003 07:17 PM
The washer increases the static oil pressure release point. When you add the washer, (from Auto Zone) you will also increase the pressure required to open the oil pressure relief valve. This will raise the running oil pressure. This is helpful if you are building a motor that makes horsepower, especially if you decide to go with a different bearing size. Detailed mechanics address the oil pressure!! Do this........the mod was shared to me by Bear!!! It works.
Results speak louder than mouths!!!!!
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supraman95mb
Expert Class
Posts: 212
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posted February 28, 2003 10:14 PM
How thick of a washer are we talking about? Anyone know?
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02 Stroked 12R
95 Supra Single Turbo 750+ hp
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entropy
Moderator
Posts: 8671
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posted March 01, 2003 10:56 AM
 Edited By: entropy on 1 Mar 2003 10:58
Has anyone actually MEASURED the oil pressure throughout the rpm range with and without the washer?????
That would sure be interesting info, eh guys? 
I think the manual say stock is 23psi @ 4000 rpm, but I couldn't find any other oil pressure info in the manual 
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kcadby
Pro
Posts: 1733
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posted March 01, 2003 06:15 PM
Edited By: kcadby on 1 Mar 2003 18:16
I'm pretty darned sure (VERY TIRED from work week) that the valve is ONLY to relieve pressure if it climbs too high (90psi I think) so...
HOW THE HELL CAN IT RAISE THE "RUNNING PRESSURE"?!?!?!
You even called it the "pressure RELIEF valve"...
Sorry for the yelling but...I don't like how you "talk down" to people like everyone sould know everything (like you think you do)...
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Zhooligan
Moderator
Post Whore Extraordinaire!
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posted March 01, 2003 07:00 PM
Edited By: Zhooligan on 1 Mar 2003 19:02
kc your question is the same as mine. I can see the washer changing the pressure relief but not sure how it rasies the actual running pressure. Perhaps ra12r can enlighten us dummies. Or at least this dummy.
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krexken
Zone Head
Posts: 732
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posted March 03, 2003 04:35 AM
I installed a .040 thick washer in mine. Didn't check the oil pressure before I tore the motor apart. It had roughly 120psi at peak which took around 7k rpm or so to get there. Way more than enough, I'd guess. It's only gonna limit the pressure on mine to 120psi hot. It dang sure any gonna give it any more volume at less than full pressure.
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entropy
Moderator
Posts: 8671
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posted March 03, 2003 05:06 AM
thx, Ken that's the number i was looking for, 120psi.
I haven't seen any 120 psi max gauges, but maybe a 100 psi would do it???
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