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Difference Between N1 And Jun Oil Pump

SRB

By SRB,
in Engines & Forced Induction

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SRB Veteran

SRB

Posted
Posted

iv currently got a n1 fuel pump but after readin n hearing about a few go bust im considering the jun oil pump. are there any significant differences? ive just had a full engine rebuild and whacked on a t04z... all help is muchly appreciated.

novak

Adriano Grand Master

Adriano

Posted
Posted

it depends if you have a wide or narrow oil pump drive on the crank and what harmonic balancer you are using, either will be fine if you have a good balancer and a crank collar. Just make sure you put loctite on the bolts that hold the pump halves together.

DVS JEZ Grand Master

DVS JEZ

Posted
Posted
it depends if you have a wide or narrow oil pump drive on the crank and what harmonic balancer you are using, either will be fine if you have a good balancer and a crank collar. Just make sure you put loctite on the bolts that hold the pump halves together.

why do you put loctite on the 2 halves?

i just put my tomei pump in...

Beer Baron Grand Master

Beer Baron

Posted
Posted

buy the Jun pump. if you have a big dollar motor they are well worth it at around $1200 or so from memory. They flow a fair whack of oil though so I think what nick is getting at is if you are going to run the jun pump, you better be running an enlarged and baffled sump, and consider other oil control mods too (oil restrictor in the head feed, and add an external drain too).

Blitz Grand Master

Blitz

Posted
Posted
buy the Jun pump. if you have a big dollar motor they are well worth it at around $1200 or so from memory. They flow a fair whack of oil though so I think what nick is getting at is if you are going to run the jun pump, you better be running an enlarged and baffled sump, and consider other oil control mods too (oil restrictor in the head feed, and add an external drain too).

Bingo :wave:

Beer Baron Grand Master

Beer Baron

Posted
Posted

well if money is no object the Tomei is adjustable (for oil pressure) but it's another $500 or so, and in my mind is money better spent elsewhere. The jun one doesn't really give any increased pressure over the N1, but it does have vastly increased flow at any given oil pressure. I think the Jun pump is a good compromise between $$$ and performance. otherwise you end up spending so much you'll wonder why you didn't spend a bit more and dry sump it.

gtrken Grand Master

gtrken

Posted
Posted

Go the Jun/HKS/Trust oil pump route for the big dollar, high HP, big rev RB26's.

We used an N1 pump in an RB30 conversion recently and the cast gears fractured causing a complete engine failure :O:)

Most of the top shops in the east won't use the N1 pumps anymore.

Cheers

Ken

Turbz_13 Experienced

Turbz_13

Posted
Posted

make sure u pay attention to the oil return in your engine. or if you drive it hard for a period of time it may drop the bottom end like mine did. especially running a high flow oil pump

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