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Old 07-07-2002, 02:36 AM   #1
DJIMPREZA
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1994 Supra+1K, 22b
alike, 07STI

Default Rs vs wrx oil pressure

I was wondering why the wrx could hit 6.0 bars or more when cold and my cobb built engine only sees 4,5 bars or so, are there any diferences betwen ej25 and 2j20 turbo oil pump? or maybe I hooked my oil cooler kit so bad, that the system canīt raise the pressure to the wrx level? so far no check engine lights no nothing, ideas??


Thanks DJ
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Old 07-07-2002, 05:23 PM   #2
HndaTch627
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which oil cooler are you using?? where are you taking your oil pressure from?? where is the WRX owner taking their oil pressure from?? Hitting 100psi right out of the pump is no problem...however pulling 100psi at the rear of the galley shows that there is a problem.

jeremy
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Old 07-08-2002, 09:47 AM   #3
DJIMPREZA
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Jeremy!, there are taken in the same spot, we tapped the extra oil gallery allen bolt, there was no any diagram with the oil cooler!, I think I have fit the oil cooler and relocation kit so bad, that the oil pump canīt take the oil from filter, I would like to know how to fit a relocation kit in the right way, there are to passages out from the stock filter spot, one big bolt with goes to the center of the filter and another one that fits together with the oil filter holes, how does a filter works? wich is the direction of flow?
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Old 07-08-2002, 01:45 PM   #4
Boostup!
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Quote:
Originally posted by DJIMPREZA
how does a filter works? wich is the direction of flow?
Center of filter is flowing back into engine, outter holes on filter are flowing into filter from engine. FWIW, even a well setup external oil/air cooler will have at least about 5psi pressure drop across. The stock WRX water/oil cooler will have much less pressure drop because of it's neat design.

Toon
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Old 07-08-2002, 02:42 PM   #5
HndaTch627
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Quote:
Originally posted by Boostup!
Center of filter is flowing back into engine, outter holes on filter are flowing into filter from engine. FWIW, even a well setup external oil/air cooler will have at least about 5psi pressure drop across. The stock WRX water/oil cooler will have much less pressure drop because of it's neat design.

Toon
but the a TRUE oil cooler will net you a better temperature drop then the WRX system, the WRX system is meant more to get the oil to operating temperature and keep it there.

jeremy
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Old 07-08-2002, 03:13 PM   #6
Boostup!
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Quote:
Originally posted by HndaTch627
but the a TRUE oil cooler will net you a better temperature drop then the WRX system, the WRX system is meant more to get the oil to operating temperature and keep it there.

jeremy
That's very true Jeremy, that's why I opted to install a 16 row Setrab air/oil cooler. I wasn't implying that the extra pressure drop is a big deal, just trying to answer DJ's question.
I think the main journal bearings and camshaft bearings have a dedicated oil supply direct from the oil pump, which does not circulate though the filter first. Only a portion of the oil is sent to the filter for cleaning and eventually all the oil will have passed through the oil filter. So in theory, you are not loosing oil pressure to the most important bearings in the engine.

Toon
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Old 07-08-2002, 09:30 PM   #7
DJIMPREZA
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Default

Thanks a lot Toon!, thatīs exactly the way I tought it would be, so I installed it (block-filter-oil cooler-block) well the, graham goode lines that came with the kit are quite big 10 AN, and there is 1,5 more liters capacity with the system!, stock uses 4 liters, now with wrx oil pan and oil cooler kit, 5,5 liters!
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Old 07-09-2002, 03:21 AM   #8
HndaTch627
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having extra oil is never a bad thing...getting it all out sometimes in a PITA though
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