Which Water Pump?

[kitto]

Hey everyone,

Well the time has come for me to choose which water pump to put on my freshly forged RB25 NEO.

I know there are many threads of stock vs N1 water pumps but I'm asking for your opinion for my specific setup.

I have an N1 and NEO pump to choose from. The NEO pump is not like a standard RB25 pump, the casting is different. It looks like Nissan tried to rectify an issue on the NEO with this pump.

The car is a 95% dedicated track car for sprinting. Rev limit will be no higher than 7,500RPM. I'll be using an OEM R31 radiator, but of I'm having over heating issues I'll throw in a PWR rad.

My understanding is the N1 is really designed for engines seeing very high RPM above 8,000 RPM regularly. Now my engine will spend a lot of time revving high, but not that high.

The downsides of fitting an N1 pump is the elongated hole may leak and it may not pump enough water at low RPM.

What do you guys think?

I'll upload a pic comparing the two when I'm on my computer.

Cheers.

[TiTAN]

N1 is designed to reduce cavitation at higher revs, that doesn't just mean above 8000.

for a dedicated track car go N1, for street cars go standard.

[kitto]

Fair call, it will occasionally see low RPM events/street driving.

How do people effectively seal the elongated hole on the N1 pump?

[JustinP]

Or something completely different...

Electric water pump

[kitto]

Nah f**k that