My Budget Rb26 Refresh Plan.

[Charles W.]

i am going to buy a rb26 in a month or so and i am figuring out what i need to get the engine refresh. I am not going to run big horse power so i'll stick with oem internals. here is my plan for the rebuild.

N1 piston

N1 oil pump

N1 water pump

oem gasket kit

oem main bearings

oem con rod bearings

R33 crank (if i couldnt find a jun collar)

I will be running stock turbo and stock boost but i will be doing some upgrade soon. I am looking around 400whp after i get new turbos and all the supporting fuel mods. Here is the question i have.

What is the different between the N1 and stock piston?

Will this set up be able to withstand 400whp reliably? I am using this as a track/drift/autox car, will it stand my abuse??

is there anything i will need to add or remove??

i just want to confirm before actually going to purchase these parts, thanks for all the help.

[paulr33]

if you do all that be sure to replace the standard ceramic turbochargers

[djr81]

If you are taking the motor out you may as well fix up the oiling system with some baffles & put a restrictor in the head.

Also shop around for pistons.

This lot will live with 400rwhp.

[R31Nismoid]

Make sure you use good rod bolts

Change the stock turbos then and there

Read the OIL control thread (its in the sticky guide)

Might aswell use forged pistons for the price you pay for N1.

Dont need baffles though, no-one else does

[Charles W.]

haha, i got a gd deal on those N1 piston. 700USD shipped with rings and pin. don't think i can get a set of forged of that price. so i will need a tomei head restrictor for it? so a gd set of rod bolts?? do i need new head studs too?? sry i am new to this engine rebuilding thing. Also i am wondering do i order standard size bearings or i need to get the little wax thing and figure out the cleareance?? i got very confuse over this because someoen told me standard size is ok. which one is true?? thanks

[Beer Baron]

$700 USD it quite expensive for stock pistons. I would have thought more like $400-$500 USD.

[Charles W.]

$700 USD it quite expensive for stock pistons. I would have thought more like $400-$500 USD.

oh, really? is n1 piston better than stokc? whts the different?? also can anyone direct me to the sticky forum?? i have search the whole faq and found nothing.

[robbieraver]

im in the process of doing a simalar build, what would be a good choice of turbo(twin), im also not a horse power hero, just a bit more for my purpose, track and the mountain passes..

would sticking to the same stock turbos BUT changing the ceramic wheels to steel be a good move....

[Beer Baron]

I don't know of any difference between N1 piston or standard piston. I would say they are the same thing. but can't tell for sure. maybe ask the dude selling you this pistons to explain the differences? either way, N1/stock/whatever $700USD is not very cheap for a set of OEM cast pistons.

[R31Nismoid]

If there is a difference, i would suspect it to be very very minimal.

Im with Richard on this one, $700USD is a bit exxy

[blk180]

Its in the Forced induction sticky

And here now

http://www.skylinesaustralia.com/forums/in...howtopic=110680

Brad

[shanef]

to save money you could also not run n1 pumps, just normal 33 gtr pumps would suffice i reckon.

the money u've saved on not using n1 pumps, get some acl race series bearings (158 for mains & big end)

ARP 2000 rod bolts

you dont 'need' headstuds or main studs, the normal ones would do i reckon.

well that's my ideas

[T04GTR]

cool. n1 pistons are cheap. about 80 each.

use sr20 bigend bearings from acl. (there identical,im not sure they have the 25/26 bearings on file) about 80 bucks for 16 shells.

use rb30 mains (acl) about 60 bucks (two sets,explained later)

the n1 piston uses better rings but is still prone to breaking. a friend told me a stock pistion can take about 3 seconds of detonation an n1 can take 4 hehe

use a 5 dollar oil restrictor (tomie)

use a genuin cambelt.(cheaper than aftermarket)

the gasket set is a bit pricy but un avoidable.

dont bother with a steel head gasket. (mines oem and pushing 450hp atw.)

one thing worth getting is a n1 harmonic balancer.

dont get arp studs. (unless your getting it line bored and torqueplate honed.)

use tomie rod bolts. (arp use the vg30 ones and there to short.)

set it up 2.5 thou on the mains and 1.6-1.8 thou on the bigends. use the groved block side maines on both sides of the crank. but you will have to get the girdle notched to suit the bearing retaining notch on the other side.

or you could not bother lol.

get the crank grub screwd so you can clean it properly.

[sinistaGTR]

yeh you can get good wiseco pistons from the states for 1100 aud deillivered

[T04GTR]

dont go forgies. its to hard to get the machining corect if your on a budget. if in dought get ones with file back rings. like cp.

[T04GTR]

if its a BUDGET rebild keep it that way lol, all the stuff i sugested is not expencive to do

[fEkuaR]

N1 pistons are forged .. Information regarding this is here http://en.wikipedia.org/wiki/Nissan_Skyline_GT-R scroll down the page and look at the N1 details.

[Charles W.]

T04GTR, thanks for the detail reply. it is very helpful. so now i come down to this

N1 piston rings

N1 pumps

tomei head restictor

tomei con rod bolt

acl sr20 big end bearings

scl rb30 main bearings

N1 harmonic balancer (how will this help in reliability wise???)

OEM Gasket kit

R33 crank (used)

Also, can you explain more regarding on fitting the bearings?? it gets kind of confusing..

Perhaps if anyone can send me a link of where you can get 80 bucks N1 piston?? I normally buy stuff on yahoo auction in japan, is there other source?

[Charles W.]

im in the process of doing a simalar build, what would be a good choice of turbo(twin), im also not a horse power hero, just a bit more for my purpose, track and the mountain passes..

would sticking to the same stock turbos BUT changing the ceramic wheels to steel be a good move....

I am thinking of getting either a R34 N1 turbos or HKS GT-SS. they are both good for around 350-400whp and have good responds.