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Discussion Starter #1 (Edited)
So to provide everyone with our data on Oil Filter Relocation Kits we did the following tests. This data is open for discussion.

The setup and testing procedure took a total of 3 days worth of work with the test spanning across two days. We don't plan on doing any more testing.

If you want further testing, feel free to handle it yourself. You may post your data in this thread, no problem. But, If you are going to post your data, please include as much information about your oiling system as possible and keep your data consistent an an apples to apples comparison. Your data in comparison to ours is NOT apples to apples. Your data should be a comparison of a change on your own vehicle/engine in a similar environment.

In each datalog, I have highlighted the lowest oil pressure observed during the pull. You can read the datapoints at any point on your own by simply looking and estimating what that data point would be.

Trying to keep consistent between pulls, we logged oil temperature as well. Each run was started when oil temp reached 170 degrees F.

Each time the motor was reved to about 8000RPM

Each pull the car was making about 850hp and each pull there was no hp difference worth noting.

This motor is a PHR Built 3.0L motor using factory crankshaft, CP pistons, Carrillo Rods.

It is equipped with a PHR Modified Factory Oil Pump (yes it is shimmed). This is important to note because we will observe higher oil pressures than a factory oil pump. No, we will not be repeating the test with a factory oil pump. This test is for COMPARISON of the DIFFERENCE in oil filter setups not pump setups. We are comparing DIFFERENCES between oil pressure and how each setup changes the oil pressure.


Test # 1

Factory Non Turbo Oil Filter Housing With No Oil Cooler



Notes:
Starts off at 110psi oil pressure averages 100psi across the pull
Lowest pressure logged was 96PSI
Pressure dips down and touches 96psi right at 7200rpm and again at 7900rpm right before letting off throttle



Test # 2

Factory Twin Turbo Oil Filter Housing With Factory Oil Cooler



Notes:
Run starts out about 94psi of oil pressure and averages about 90psi throughout the pull dipping as low as 83psi at 7400rpm and again at 7900.
Averaging about 15-20psi lower throughout the entire rpm range than the factory NA setup


Test # 3

Factory Twin Turbo Oil Filter Housing With Factory Oil Cooler and PHR Oil Filter Relocation Kit



Notes:
Starts out about 88psi averages about 85psi throughout the pull and dips down to the lowest of 80psi right at 8000RPM.
Very consistent with run 2 and the factory turbo configuration. The PHR Oil Filter Relocation Kit does not appear to offer much further restriction and this

result is consistent in Test #4


Test # 4

PHR Oil Filter Relocation Kit Only, No Factory Housing or Oil Cooler



Notes:
beginning of run 112psi averaging about 108psi through the pull and tapering down to a low of 96psi
at 8000RPMs
The taper from high oil pressure seems to be a little more drastic and the over all oil pressure curve seems to be more spikey than the other runs tested reaching the highest oil pressure recorded so far of 117psi
but over all made more oil pressure and held the same as the highest tested previously (Factory non turbo)


Test # 5

Oil Filter mounted straight to Block using PHR Oil Filter Union



Notes:
Starts out at 110-112 psi avg 108psi max 114psi min 103psi
Over all consistent with the NA oil filter housing except the taper was not evident at higher RPM
Unlike any other tests the lowest oil pressure recorded was over 100psi


Test Opinions
If oil pressure is of concern to you (and it should be in a race application) then my opinion would be to ditch the factory oil cooler completely. If a Relocation Kit and Oil Cooler is needed then the results from directly off the block (no factory housing) exceeded all other tests... in other words, the factory oil cooler is a big restriction.
In a high RPM fun revving situation the oil pressure fall off was not as evident mating the filter directly to the block using the oil filter union and i would assume the typical oil starve situation that happens at very high RPMs would be extended by a couple hundred revs, but overall made more oil pressure and held the same as the highest tested previously (Factory non turbo)
 

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Old School Socal Member
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Just wondering if a street driven test would have been more beneficial to find out whether the gains in pressure were made at the expense of cooling the oil.
 

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Master Shit Fixer
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Has anyone looked at the inside of the factory oil cooler to see if it could be "ported" or "honed" to flow more oil? I like having it because it serves as a heat exchanger (warming the oil with the coolant) when the engine is warming up, but I don't want to lose 20 psi of oil pressure.
 

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Boost Junkie
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So what is the general rule of thumb. At X rpm you want X amount of oil pressure?

Steve
 

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Super Moderator
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Awesome test! Thanks for sharing the data! :beer:


What concerns, if any, should one have about running a factory oil pump without the factory oil cooler assembly, as in configuration #5?
Would that present a higher FMS risk from the increased oil pressure w/o a modified pump's expanded relief capacity?
 

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Master Shit Fixer
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My general rule is 10psi for every 1000 rpm
Then it sounds like as long as you have 80psi at 8000 RPM, you're fine. Therefore, all of the configurations you tested provide good oil pressure.
 

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Discussion Starter #9
Awesome test! Thanks for sharing the data! :beer:


What concerns, if any, should one have about running a factory oil pump without the factory oil cooler assembly, as in configuration #5?
Would that present a higher FMS risk from the increased oil pressure w/o a modified pump's expanded relief capacity?
In this case that won't actually be a concern, wreckless. The pressure at the pump would actually be lower in setup number 5 because we've removed a restriction. The measurements taken are in the oil galley AFTER the filter. This can be stated simply according to these tests: Higher Oil Pressure in Oil Galley = Lower Oil Pressure at pump :::: Lower Oil Pressure in Oil Galley = Higher Pressure at the Pump. Think of the oil filter and housings as a restriction that increases pressure at the pump but lowers it at the galley.
 

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Inline for the win
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Bryan,


Pressure measurement, off the bolt or the same location as the factory pressure sensor?

DP
 

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Slow 2JZ
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So in shorter terms, I am not racing other than highway runs. I am on stock oil cooler, with a PHR relocation filter kit, and I'll be just fine correct? :)
 

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Thanks for the update. I'll read through this over the weekend. I've got some new data as well. Thanks to Bryan and Ross I'm sure this was a messy pita to do.
There's not much to read, the testing shows conclusively that the pressure drop due to the relocation kit is negligible.

As I said before, the extended pickup on your deep sump pan is far more worrisome than 3 feet of -10 line, as you're increasing the head loss in the inlet side of the system by dropping the pickup. Cavitation is a far more likely culprit for any oil pressure loss you see, and the lower your pressure at the inlet, the more likely you are to see it.
 

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I am currently still in my never ending build but i have mine setup the exact same as test #4 however i have a bone stock unmodified oil pump. Do you foresee any problems running this configuration?
 
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