R34 N1 motor build/info/limit? - GT-R Register - Official Nissan Skyline and GTR Owners Club forum

Mashrock · 4th August 2008, 01:05 AM

Hello,

I currently have a 34 N1 motor on its way to install into my 32gtr.

Car is for track use and maybe little street driving if i get rego again.

I'm wondering should i get some work done to it before i install or will it be good enough for now.

Was considering getting the bottom end balanced (do i need to or is the factory job good enough??) but this is probably a waste of time if i am not putting in aftermarket internals?

Also plan to use standard n1 oil pump as these are still very good if bottom end is balanced and rev limit kept low and no rev limit launching

i have 800cc injectors and Ati balancer to go on and a few other bits and pieces with 34n1 turbos and was thinking of pushing upwards of 1.7bar

whats the power limit of a 34 n1 motor?

Cheers

Andrew

GT-R Glenn · 4th August 2008, 06:53 AM

Mashrock · 4th August 2008, 07:23 AM

Quote:

Originally Posted by GT-R Glenn

Sigh

Let me guess.. you have a problem with n1 oil pumps?

tokes · 9th August 2008, 08:03 AM

The stock N1 motor isn't that much better than a regular motor, the weak link is going to be the cast pistons and rod bolts.

SamuraiSam · 9th August 2008, 03:32 PM

I say the weak link is going to be the oil pump.

zell · 9th August 2008, 03:48 PM

Wasn't there a differance between transfer cases on R32/33 and R34 ?

Why not rebuild the old engine to nice spec ? It would be much more bombproof than that N1.

GT-R Glenn · 10th August 2008, 01:29 AM

The diff will have a different ratio 3.54 or whatever 34's run, so you need to fit the 4.11 into it or change sumps over,
I would make a bigger sump.
Especially if you are ever going to slicks on the car.
Will n1 turbos work at 1.7 bar ??

The "sigh" was , well , I guess have you looked around the site yet ?

Mashrock · 10th August 2008, 11:22 PM

Quote:

Originally Posted by GT-R Glenn

The diff will have a different ratio 3.54 or whatever 34's run, so you need to fit the 4.11 into it or change sumps over,
I would make a bigger sump.
Especially if you are ever going to slicks on the car.
Will n1 turbos work at 1.7 bar ??

The "sigh" was , well , I guess have you looked around the site yet ?

The turbos ran 1.7 on my previous motor, they have been modified and have a larger front wheel. +5mm

as for the motor it came out of a r32 in japan, so i'm sure the diff will be fine

What i will do is get the motor checked out, see whats there and its condition, and go from there, perhaps a build will be on the cards, rods pistons bearings and some porting to the head i think will be the go...

they have been safely pushed for around 350kw on a stock n1 motor, but i also do want some reliability..

as for the n1 oil pump limit, with a correctly balanced bottom end with a good harmonic balancer they have been shown not to fail.. and a bit of care with revs and launching.. Tho i can get some billet pump gears for them here in Australia

P.s. i did do a quick search but did not find much to do with what i needed to know

GT-R Glenn · 11th August 2008, 05:41 AM

Ok sweet.
Sounds like you already have a pretty good idea of what to do.
If you do pull the thing to bits see if it has the oil pump drive done.

Mashrock · 11th August 2008, 11:30 PM

R34 motor :P no collar required...

i've got the sump off so far and letting it drain out of all the excess oil.

will take the head off tonite to inspect the bores and tops of the pistons

the bottom of the pistons looked quiet shiny. perhaps they are aftermarket, tho the rod bolts looked standard..

May start a new thread with photos about the rebuild if it happens.

Mashrock · 14th August 2008, 11:58 PM

Ok so i've pulled the motor down a fair way so far, i think i might have a dig at the rebuild myself as there is a fair amount of information on here and some of my friends have all the tools needed,

what i would like to know is.

Rod bolts on the standard rods, which Arp partnumber is it? rb26 isnt listed. i have people telling me sr20 but i'll need two sets. so is there a 6cyl that will have this?

The pistons have a 05 on top. so does this mean i have myself an engine thats already faced a rebuild??? or do n1 motors come oversize already???

I'm considering going the Mahle Powerpack, standard rods with arp bolts and a cleanup/shot peend, acl race series bearings, oil restrictor etc..

head will get cleaned up and possibly get knife edged on the ports, maybe jun valve guides and new springs. but will work the head out along the way. not in a great rush anymore.

would like around 450kw at the wheels maxx.

any opinions on this at all?

4th August 2008, 01:05 AM	#1 (permalink)
Mashrock GTR Register Member Join Date: Jan 2005 Location: Sydney, Australia Posts: 161	R34 N1 motor build/info/limit? Hello, I currently have a 34 N1 motor on its way to install into my 32gtr. Car is for track use and maybe little street driving if i get rego again. I'm wondering should i get some work done to it before i install or will it be good enough for now. Was considering getting the bottom end balanced (do i need to or is the factory job good enough??) but this is probably a waste of time if i am not putting in aftermarket internals? Also plan to use standard n1 oil pump as these are still very good if bottom end is balanced and rev limit kept low and no rev limit launching i have 800cc injectors and Ati balancer to go on and a few other bits and pieces with 34n1 turbos and was thinking of pushing upwards of 1.7bar whats the power limit of a 34 n1 motor? Cheers Andrew

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4th August 2008, 06:53 AM	#2 (permalink)
GT-R Glenn GTR Register Member Join Date: Nov 2002 Location: Waiuku NZ Posts: 1,227	Sigh

9th August 2008, 08:03 AM	#4 (permalink)
tokes GTR Register Member Join Date: Jul 2006 Location: Canada Posts: 322	The stock N1 motor isn't that much better than a regular motor, the weak link is going to be the cast pistons and rod bolts.

9th August 2008, 03:32 PM	#5 (permalink)
SamuraiSam GTR Register Member Join Date: Oct 2007 Posts: 390	I say the weak link is going to be the oil pump.

9th August 2008, 03:48 PM	#6 (permalink)
zell GTROC Member Join Date: Nov 2007 Location: Lublin, Poland Posts: 198	Wasn't there a differance between transfer cases on R32/33 and R34 ? Why not rebuild the old engine to nice spec ? It would be much more bombproof than that N1.

10th August 2008, 01:29 AM	#7 (permalink)
GT-R Glenn GTR Register Member Join Date: Nov 2002 Location: Waiuku NZ Posts: 1,227	The diff will have a different ratio 3.54 or whatever 34's run, so you need to fit the 4.11 into it or change sumps over, I would make a bigger sump. Especially if you are ever going to slicks on the car. Will n1 turbos work at 1.7 bar ?? The "sigh" was , well , I guess have you looked around the site yet ?

11th August 2008, 05:41 AM	#9 (permalink)
GT-R Glenn GTR Register Member Join Date: Nov 2002 Location: Waiuku NZ Posts: 1,227	Ok sweet. Sounds like you already have a pretty good idea of what to do. If you do pull the thing to bits see if it has the oil pump drive done.

11th August 2008, 11:30 PM	#10 (permalink)
Mashrock GTR Register Member Join Date: Jan 2005 Location: Sydney, Australia Posts: 161	R34 motor :P no collar required... i've got the sump off so far and letting it drain out of all the excess oil. will take the head off tonite to inspect the bores and tops of the pistons the bottom of the pistons looked quiet shiny. perhaps they are aftermarket, tho the rod bolts looked standard.. May start a new thread with photos about the rebuild if it happens.

14th August 2008, 11:58 PM	#11 (permalink)
Mashrock GTR Register Member Join Date: Jan 2005 Location: Sydney, Australia Posts: 161	Ok so i've pulled the motor down a fair way so far, i think i might have a dig at the rebuild myself as there is a fair amount of information on here and some of my friends have all the tools needed, what i would like to know is. Rod bolts on the standard rods, which Arp partnumber is it? rb26 isnt listed. i have people telling me sr20 but i'll need two sets. so is there a 6cyl that will have this? The pistons have a 05 on top. so does this mean i have myself an engine thats already faced a rebuild??? or do n1 motors come oversize already??? I'm considering going the Mahle Powerpack, standard rods with arp bolts and a cleanup/shot peend, acl race series bearings, oil restrictor etc.. head will get cleaned up and possibly get knife edged on the ports, maybe jun valve guides and new springs. but will work the head out along the way. not in a great rush anymore. would like around 450kw at the wheels maxx. any opinions on this at all?