rb25 water pump

[rhd240]

popped a headgasket on the 25 and need to know what the visual difference between the oem and n1 water pump? and is cometic a good gasket for rb's ?

[Gabes13]

N1 pump has 6 bigger fins while oem has 8 smaller fins. Unless your resurfacing the head and block an oem head gasket might seal better.

[rhd240]

thanx . i just didnt want to get ripped off and by an oem at n1 price. i want to run the cometic head gasket because i want to run more boost and dont want to pop another. mine popped when the wastegate vacuum came of and went to about 25 psi. u wouldnt happen to know a part # for the n1 would you ?

[l0nestar]

The OEM head gasket is more than adequate. Also, they seal better than most.
OEM Head Gasket - Raw Brokerage

Also use the OEM water pump.
Water Pumps Raw Brokerage.com

Roughly Two and a quarter shipped and your done. Also, make sure your head and deck are both straight-edged. The OEM gasket will give you a little bit of leeway if it is not exactly square.

[rhd240]

why oem water pump and gasket? i live in the south now and im triing to make it run cooler. and how much boost will the stock gasket hold? im putting a precision sc 61 turbo, 740 injectors and aem. im shooting for about 450whp but want it to be ready for more. i am also gona drive this car just about every day so i can get out of my wifes honda so i need it fairly reliable.

[gijoe392003]

You have to be careful when choosing an after market head gasket because it could change the compression, thats why most. Like said before, if you want to use a metal head gasket, make sure the deck and head are flat. I doubt you need more than OEM for the water pump, just be sure you are running a good rad and fans. Honestly though, search some more and you find better information.

[l0nestar]

I suggested the OEM gasket because, they can hold a lot of pressure, and are more forgiving than MLS gaskets. Also, as GIJoe said, with the MLS, you can modify the CR.

The OEM water pump because, unless it is a dedicated drift or road-race (sustained high rpm) car the OEM can actually out perform the N1 water pump.

Also, don't forget a set of uprated ARP head-studs.
Ducting and a decent radiator will make the biggest improvement. (although, a clutch fan is far superior to e-fans - if you can fit it.)

[rhd240]

plan on the arp studs. dont have room for the clutch fan but i am runnin dual 12in fans, koyo radiator. thanks for the info