Oil Pressure

[Rav]

Hi Guys,

I just put the stock oil pressure sender back on because my Greddy one broke. So now iam use the stock gauge on the cluster, When i hit boost it use to jump stright up to 8 kg/cm2, Now

it goes up slower and reaches just under 7 kg/cm2. Or is it fine and the stock gauge is just reading not as accriate.

Any feed back would be great. THANKS.

[Granthem]

hmm i dont know what level of oil pressure are normal. Have you checked your oil levels?

I know mine idles around 2kg/cm2 and goes up to 6 kg/cm2 on the stocko gauge, thats in an RB25neo.

[H@ME]

yeah i been really keen to find out the answer to tis particular question as there is a lot of controvery surrounding this topic.

[ArBe20]

Your guage probably isn't accurate. Wouldn't rule out other possibilites though. Did it have normal readings with the Greddy sender?

Edited February 15, 2008 by ArBe20

[GeeTR]

Stock sender and gauge are known to go faulty.. on more then one occasion, yes.

[**RB2530**]

Hi Guys,

I just put the stock oil pressure sender back on because my Greddy one broke. So now iam use the stock gauge on the cluster, When i hit boost it use to jump stright up to 8 kg/cm2, Now

it goes up slower and reaches just under 7 kg/cm2. Or is it fine and the stock gauge is just reading not as accriate.

Any feed back would be great. THANKS.

The stock gauges are not very good. They are much slower to react and are not very accurate. I recently did the reverse. My stock sensor was hardly reading at all at idle and often would drop to zero. Oil light would come on as well. I checked and there was plenty of oil and it was still getting to the head even though gauge was showing zero pressure. Then it would jump straight up to 2kg/cm. Would often fluctuate between 0 and 2. It only happened when engine was hot. It was reading normally at all other rpm ranges and temperatures so I wasn't too concerned.

I put an HKS mech gauge on and it was much faster to react and never dropped to zero..Concluded that the stock sensor was buggered.

Hope this helps

[Bliksem]

Workshop manual states that when hot for an RB25DET you should achive the following:

Idle: 1.1 kg/cm2

2000rpm 3.5 kg/cm2

6000rpm 5.6 kg/cm2

Odly, the RB26DETT should be higher at idle, and lower at revs (slightly)

Refer to attachment I have uploaded for relevant Oil pressure readings.

Skyline_Oil_Pressure.pdf

[Granthem]

Wow, well mine definitely sits at alot higher then 1.1kg/cm2 at idle. I know not all idles will be the same, but its always on 2. Nearly double seems a big gap for a faulty sender. Mines a NEO, which could change things

[Rav]

Your guage probably isn't accurate. Wouldn't rule out other possibilites though. Did it have normal readings with the Greddy sender?

Yea with the greddy it was normal and it would go all the way up to 8. Then it broke.

[Rav]

I heard that the stock gauges are not the best, I need to go and get another afther market one asp.

Ill most likely get my car dyno tuned in the next couple of weeks and they be able to tell me if my oil pressure correct.

[R34GTFOUR]

Wow, well mine definitely sits at alot higher then 1.1kg/cm2 at idle. I know not all idles will be the same, but its always on 2. Nearly double seems a big gap for a faulty sender. Mines a NEO, which could change things

yeah my neo reads pretty high aswell, at idle once warm it will sit right on 4, which is almost double anyother r33 i have seen. I havent put a mechanical gauge on it yet, but those stock gauges seem to lie a fair bit