To N1 or not to N1?

[m_melen]

OEM oil pump is $152USD on nismoparts.com
no clue on the others!

[actionbstard]

N1 is 298.00usd
Jun is 1k usd
greddy is like 1,100.00usd
hks is 1,954.00usd
tomei is 1,480.00usd
nismo 1.100.00usd
Reimax ?really don't know

don't get me wrong but 350 on a rb20 is alot

[m_melen]

wows. 298 bucks to 1 grand is a big jump. can an N1 or OEM pump seriously not handle 400hp?

[actionbstard]

just as lung as you keep the revs below 750 you should be alright.I will not even let it touch the 7.5k rpms.Now what some do is that they upgrade to gears since these are the only thing that brakes in the n1 oil pump.Reimax gears will go for up to 600usd ad the cost of the oil pump plus the collar drive(for some early models) and then you can rev 8k confident.But never more then 8k.Now Jun pumps have been proven and tested for up to 10k.But to rev more then 8k takes more then a oil pump.This is just like pistons.CP and wiseco can maybe handle what a garantee HKS piston will handle.Its where you want to put the money in proven parts or not.
anyway the correct way and most logical would be to run tested products.But thats just me.I cant afford a fix like a throw out bearing.So I go for the most reliable ones.But maybe thats just me tho.

[BenC]

just as lung as you keep the revs below 750

Holy **** don't even start the car then.. haha jk jk seriously though its all about RPMs with oil pumps

[m_melen]

okay, so time for some serious opinions from you guys.
if i stick with an OEM or N1 oil pump I'll be okay if I keep it under 7,500RPM?
when do i really need it to rev above 7500RPM?
and finally, at what RPM does the stock limiter cut an RB20DET at?

my setup for this year is a stock top end, upgraded bottom end with .5mm overbored forged pistons and conrods, acl bearings and arp studs all around. next year's the big money build on the top end!
by the time both are finished i'd like my engine to be able to safely handle 400hp.

[tokes]

Everyone says avoid the rev limiter and you'll be gravy.

dirtgarage on GTR.co.uk (they're from australia or NZ, forgot which) went mid 9's @ 145 shifting at over 9000 on an N1 oil pump. Food for thought.

[m_melen]

thanks tokes, that makes me feel better about not getting a 1000 dollar oil pump.

but still, when does the stock rev limiter cut?

[J-Ran]

around 7500 i think, i changed mine to 7800 and have had no issues with my oil pump...

[mcfly]

Everyone says avoid the rev limiter and you'll be gravy.

dirtgarage on GTR.co.uk (they're from australia or NZ, forgot which) went mid 9's @ 145 shifting at over 9000 on an N1 oil pump. Food for thought.

exactly, no shock loading and no oil drive/gear failure.

[Dragon Humper]

I don't have an aftermarket pump in my car (might be an N1, I don't know) and I rev it to 8000 everytime I drive the car. In the odd boo boo where I let it get away from me I have let it go to 8500 (like last nite, teehee). I do not use a rev imiter and only use dino diesel oil with some EOS from GM (contains anti-galling agents that you won't get in a synthetic). I also make sure that the sump is a little bit over full to make sure the pickup doesn't get uncovered.

Some may say I'm living on borrowed time but the car makes so much power so quickly that I don't think I'm the only one to rev it like that. Plus, a street car won't rev that high for very long (2 to 5 sec at the most) so it won't be subjected to the same abuse that a road race engine would.




Jon.

[m_melen]

alright, this is some great info guys thanks alot! i'll make sure i keep it under 7500RPM, on most days when i'm just driving i shift it around 3500RPM anyway, i'll just have to keep an eye on it when it's time to thrash the car.
can anybody else confirm that the stock limiter is around 7500?

[Skym]

There are 2 limiters on stock RB20DET ECU, one limiter is soft limiter and the other one is a hard limiter. From what I can remember, one limiter is set at roughly 7500rpm and the other one at roughly 7800rpm.

[actionbstard]

I'm wondering if you up grade those N1 oil pumps and install those reimax gears will it handle above 8k rpms?
has anyone run this set up?

[mcfly]

I'm wondering if you up grade those N1 oil pumps and install those reimax gears will it handle above 8k rpms?
has anyone run this set up?

as was already stated, they do fine above 8000 rpm so long as you don't bounce off rev limiters.