Jump to content
SAU Community

Another N1 Oil Pump Thread

1SLP80

By 1SLP80,
in Engines & Forced Induction

 Share

Recommended Posts

1SLP80 Contributor

1SLP80

Posted
Posted

Hey guys,

I just gave my RB25 a freshen up. In the list of things that got done, a N1 oil pump installed. My question is directed at oil pressure. Before the install my oil pressure sat at 110kpa, which is spot on when warm. After the N1 was installed i noticed that my oil pressure is much higher - 190kpa when warm.

What are your thoughts?

Surely the oil pump has caused the pressure increase..........? is this good, bad or nothing...

what are the affects of excessive pressure and how much is too much

Link to comment
https://www.sau.com.au/forums/topic/252911-another-n1-oil-pump-thread/
Share on other sites
The Dan Grand Master

The Dan

Posted
Posted

Idle oil pressure is not so important. As long as clean oil is flowing and you have at least 5psi at idle then the engine will not fail as a result.

it is better that you have 190kpa (27.5psi) at warm idle. There is no real 'too much' amount but if I were going to say 'geez that's a bit high', it would be at around 275kpa (40psi). Pressure above 110psi can sometimes lead to issues with seals etc but normally that kind of pressure is only at cold start and/or full throttle with a shimmed high flowing pump - and even then it's only for a short period.

Make sure you have 275kpa (40psi) at around 2500-3000rpm, 410kpa(60psi) at around 4000-6000rpm.

Anything over 6000rpm, try to ensure you have at least 60psi but not so important as long as your revs stay under 7000rpm.

Duncan Grand Master

Duncan

Posted
Posted

Also keep in mind the thickness of your oil has much more impact on oil pressure than changing the pump (n1 has pretty close to std pressure, some others like tomei are higher than those). Are you using the same oil as before?

1SLP80 Contributor

1SLP80

Posted
  • Author
Posted

Yeh myt oil is always old, i change every 5000kms or 3 months and before and after every track day. Im using castrol edge sport 0w-40 atm. I always use 0w-40, but im thinking i might run thicker w50/w60 at the track.

At idle its 190kpa like i mentioned, at WOT when warm, im sure i see over 600kpa. Can double check today as my gauges have recall

1SLP80 Contributor

1SLP80

Posted
  • Author
Posted
Idle oil pressure is not so important. As long as clean oil is flowing and you have at least 5psi at idle then the engine will not fail as a result.

it is better that you have 190kpa (27.5psi) at warm idle. There is no real 'too much' amount but if I were going to say 'geez that's a bit high', it would be at around 275kpa (40psi). Pressure above 110psi can sometimes lead to issues with seals etc but normally that kind of pressure is only at cold start and/or full throttle with a shimmed high flowing pump - and even then it's only for a short period.

Make sure you have 275kpa (40psi) at around 2500-3000rpm, 410kpa(60psi) at around 4000-6000rpm.

Anything over 6000rpm, try to ensure you have at least 60psi but not so important as long as your revs stay under 7000rpm.

I just gave it a strap in 2nd on the way to get brekkie, i got 620kpa (90psi?) at 6100rpm. Thats ok isnt it? As long as itr doesnt go over 110 psi.

This is my drift car too btw.

The Dan Grand Master

The Dan

Posted
Posted
I just gave it a strap in 2nd on the way to get brekkie, i got 620kpa (90psi?) at 6100rpm. Thats ok isnt it? As long as itr doesnt go over 110 psi.

This is my drift car too btw.

That's good.

Anything around that or up to 110 is fine really. Even over 110 is fine but its less desirable. Your pressure is good.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • cosline
      R32 gtr transmission strength, billet plate

      By cosline · Posted

      Yes, I know🙄 but the sequential is not in my budget... don't want to reduce power neither, so looks like I'm stuck in the rabbit hole🤣
    • Piggaz
      R32 gtr transmission strength, billet plate

      By Piggaz · Posted

      You’ll be very upset when you bust that too not to mention the gearing totally sucks. Don’t do it.
    • MBS206
      R32 GTS (RB20DE) Injectors Replacement

      By MBS206 · Posted

      Is the panel filter one that is oiled? Have you ever cleaned or touched the AFM?
    • The Bogan
      NC MX5

      By The Bogan · Posted

      So.... the K&N air box thingo was too big, ended up gifting it to a mate, well, by gifting it he actually supplied food and beer at the pub,  which was nice, as it will not sit on a shelf in the garage for the next 10 years I did trim up some of the existing stuff to neaten it all up and gave it some wrinkle paint, unfortunately it currently has a used and abused mish mash of different types of hose clamps, 4 big fat T bolt type (shit), and a few normal clamps of vairing sizes and brands, but..... only until the 6 constant tension black worm clamps that I ordered from EFI solutions turn up next week Currently the current hose clamps are triggering me hard, LOL Is this the final version, probably not, I really want just 2 silicone pieces, a straight bit of silicone from the filter to the MAF is easy and will happen as soon as I head into Just Jap tomorrow, the problematic part is a 30° silicone bend from the MAF to the TB that I can connect the engine breather from the head, I found that there are bulk head fittings for boat bilge pumps that should work, but until I can get a 30° silicone bend the alloy pipe, and the 11ty thousand hose clamps, are there for the foreseeable future 4 hose clamps are golden, 6 are grudgingly acceptable, the 8 currently holding it all together is just taking the piss    I've also ordered 60 more retaining wall blocks for the front yard, I mis-gonculated the height that was required to get above the base of the Photinia's (red robin's) that are the hedge behind the front fence, currently it is 2 blocks high, and about 1/2 a block short, so going 3 blocks high will be above the base of the red robin's, and allow some room for mulch
    • GabsReDeal
      R32 GTS (RB20DE) Injectors Replacement

      By GabsReDeal · Posted

      It is the stock air box with the panel filter. Everything else is stock except the exhaust at this point, as I also went back to the cleaned 270cc injectors. I will check the RPM when the IACV is unplugged and report back.
×
×
  • Create New...