Jump to content
SAU Community

N1 Water Pump Vs Standard Water Pump

benny78

By benny78,
in Engines & Forced Induction

 Share

Recommended Posts

benny78 Community Regular

benny78

Posted
Posted

Hey all, was under the impression that the N1 water pump is a high volume water pump compared to the standard r33 gtr water pump, though, the N1 water pump has less fins than the factory pump.

N1 has 6.

Standard has 9 i think.

Therefore you would assume the more fins the better??

Can somone shed some light on this situation please?

Thanks guys!

nobby Collaborator

nobby

Posted
Posted
the n1 is less volume due to the use of sustained higher rpm on high output engines or track use in general. The stock pump will flow the water around too quickly when using constant high rpm.

and the plate thats at the back is to reduce/stop cavatition also.

daisu Mentor

daisu

Posted
Posted

Hard decision to make when you are trying to make the engine reliable for track use, so you don't want it cavitating at high revs. But in reality it will probably spend most of it's life driving on the streets and depending on where you live, stop/start traffic, so you need a pump that flows well at idle/low revs

Duncan Grand Master

Duncan

Posted
Posted

I'd reckon almost any car should use std not n1 pumps.

There are very few cars, even with track use, that do more than 3-5 laps flat out at a time.

Full on race car like my production car has one and it helps keep temps down (still too high), but that is up to 1 hr enduro at an average of 5-6000rpm.

Duncan Grand Master

Duncan

Posted
Posted

yep I run an oversize pulley on mine as well as an n1 pump. and a flow restrictor in the hose. and a larger radiator with shroud. and distilled water with redline water wetter. depends how serious the cooling need is I guess.

One big issue with oversize water pump pulley is it will foul on the harmonic balancer which you need to cut back for clearance.

but the n1 pump isn't really "more efficient", there's nothing actually wrong with the standard pump in normal and spirited driving use. Its just when it's running 3 times faster all the time things get silly.

GT-RZ Community Regular

GT-RZ

Posted
Posted
yep I run an oversize pulley on mine as well as an n1 pump. and a flow restrictor in the hose. and a larger radiator with shroud. and distilled water with redline water wetter. depends how serious the cooling need is I guess.

One big issue with oversize water pump pulley is it will foul on the harmonic balancer which you need to cut back for clearance.

but the n1 pump isn't really "more efficient", there's nothing actually wrong with the standard pump in normal and spirited driving use. Its just when it's running 3 times faster all the time things get silly.

I was referring more to the standard rb26 pump, it has more fins and flows more so by putting a larger pulley on you would simply slow the flow down slightly which is better for higher rpm driving. Probably in the middle of the two...

unique1 Mentor

unique1

Posted
Posted

i ran an n1 water pump on my fairly modified rb26 in a stagea using the stock radiator that it come with (used to be rb25) and it was perfect in traffic and never ever ever got warm, i went in Motorvation local carshow and sat idle in traffic the supercruise with outside temps of 35 degrees + and it was perfect and other cars were cooking lol. I run an ATI 1000hp balancer which is very small compared to the stock one so it would be spinning even slower and still no issue.

STATUS Grand Master

STATUS

Posted
Posted
i ran an n1 water pump on my fairly modified rb26 in a stagea using the stock radiator that it come with (used to be rb25) and it was perfect in traffic and never ever ever got warm, i went in Motorvation local carshow and sat idle in traffic the supercruise with outside temps of 35 degrees + and it was perfect and other cars were cooking lol. I run an ATI 1000hp balancer which is very small compared to the stock one so it would be spinning even slower and still no issue.

remmeber the 100hp ati balancer comes with a water pump pulley :P

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

    • Matt Z
      SAU NSW - Archies Flame Grille Meet & Cruise to Kurnell

      By Matt Z · Posted

      Join SAU NSW for a flame-grilled feed & flame-spitting cruise! Sunday 17th August 2025 3:30PM Meeting Archies Flame Grille Sylvania Waters 4:45PM Cruise Departure 5:15PM Arrival at Cape Solander Kurnell Meet Location: Archies Flame Grille Final Destination: Cape Solander Kurnell *Disclaimer* There will be a lead and follow car so no one should get lost. If you would like to attend or bring others along please put your name down and a +1 as numbers will be needed prior! This is NOT a race and we will all be adhering to all road rules. If this is what you want please come to one of our many track days. This is an official SAU:NSW event and will be run under a CAMS permit. One of the things that really sets our club apart is our commitment to being true enthusiasts. When on normal roads we strive to maintain good relations with the authorities as well as the public in general. When attending one of Skylines Australia NSW events please try to: • Be aware of surrounding environment and act accordingly. • Drive courteously on the state’s roads as a true enthusiast should. • Understand how important it is to maintain the good name of SAU NSW and thus, treat others accordingly. • Any misbehavior will not be tolerated and you will be asked to leave.
    • Ozdavroz
      WTAC 2025

      By Ozdavroz · Posted

      Yeah good luck out there! Will be good to see a mighty GTST going harder than the GTRs
    • bcozican
      WTAC 2025

      By bcozican · Posted

      i will be there 😁
    • patrickxdf12
      Squeaking clutch/throw out bearing

      By patrickxdf12 · Posted

      Hello!  i just finished manual swaping my r34 skyline with a r33 rb20de box(RB71C)box  When the car is running it squeaks crazy loud and it was smoking from the gearbox area. The gearbox is fine it was tested. The clutch slave cylinder seems like it doesn't fully releases the clutch. I want to ask if this noise is from the throw out bearing or could it be the clutch assembly or disk att.xFliq87Gzw6kImKBVqDebXkj0fBqymk0JaYeP3_3SlM.mp4
    • RP1421
      S15 Spec R

      By RP1421 · Posted

      A few small updates since the previous post and lessons. I decided to do a little interior light upgrade on the 110. I quite like the iilumo items, even if they're a bit of a premium over other brands. You'll also note the Stedi Fogs, that will go into the S15 fog lights as I needed to match the bulbs since I got the new ones earlier. I hope they fit as the body is quite a bit longer than your normal bulb.  Annoyingly, I managed to trip the fuse, which normally wouldn't be an issue until I located the fuse. I can't say I've ever come across this. I had lucked out that someone nearby had a spare, but oddly enough Toyota dealerships seem to keep this in stock. I ordered some to keep in my stash and as luck would have it, someone else nearby tripped the same fuse so I passed on the favour.  I also did a little service on the 110 ahead of some additional work coming up. It's been annoying that Goleby's stopped carrying this particular HKS filter for the 110, so now I need to keep them on order from Japan. I also took the opportunity to install a bash plate and number plate riser. The plate riser is such a cheap but nice fix to help really tidy up the car. I'm tempted to now also replace my headlights, on this car. Both items were from Project Aero.    I also needed to replace the rear tyres on the 110, and after trying to get it aligned learnt that I need to replace some bushes in the front end, so that's next.  Closing out this update with a nicer picture as always! 
×
×
  • Create New...