Jump to content
SAU Community

Recommended Posts

Maybe I will start a thread on oil pumps :(

Anyway - to look at my original question about the blocks.... what is it that hurts them?

I have a block that came out a car that would have not been making much more than 300kw. Block cracked between the waterjacket and the bore number 2, filled the bore with water (at revs), and ended with a piston sized hole in the side of the block....

It was a stock motor that was obviously leant on. What a way to go though... BOOM!

:P

I'd imagine there would be quite a number of big RPM launches behind the car that split the block around that point :)

How many R34 N1 engines fracture oil pumps?...none that ive heard of...why not?

well balanced engine with good quality fresh balancer on the front.

its harmonic crank vibration that kills oil pumps...the higher the revs the worse the problem.

id spend the extra $600 on an ATI balancer and stick with your N1.

this is free advice from someone who has done a lot of work, testing and research on this very issue. At quite a bit of expense.

i dont know of many r34's but i have heard of N1 r33 with smiliar problems.

why not spend a little extra for better peace of mind.

rob82 standard r32 oil pumps are weak as

i dont know of many r34's but i have heard of N1 r33 with smiliar problems.

why not spend a little extra for better peace of mind.

rob82 standard r32 oil pumps are weak as

Are you saying that because the r32 have the small oil pump drive or because you geniunely know that the pumps are weak? So R33 GTR oil pumps are fine?

How many R34 N1 engines fracture oil pumps?...none that ive heard of...why not?

Well, now you have.

R34 N1 motor, straight from Nissan, 15,000kms on the clock, cracked crank journal in the N1 pump.

Still have the pump sitting at home if you want pictures.

How many R34 N1 engines fracture oil pumps?...none that ive heard of...why not?

well balanced engine with good quality fresh balancer on the front.

its harmonic crank vibration that kills oil pumps...the higher the revs the worse the problem.

id spend the extra $600 on an ATI balancer and stick with your N1.

this is free advice from someone who has done a lot of work, testing and research on this very issue. At quite a bit of expense.

im sure the N1 oil pump is good, i neva said it wasnt

all im saying is if ur going to rebuild ur engine and u have ur engine in piece's ur beter of spending that little bit extra and getting some thing better

this is coming from some one who runs a custom machined CNC stainless billet oil pump which has been heat treated

alot of research went into this oil pump the 1st one machined up had some problems with the valve staying closed but with more researching and testing we got it right

I haven't heard of ONE pump failure among anyone here in Vic i know using them.

Being most of them DONT do big RPM launches and mainly track work or street... all of them have been totally fine.

Some of the users that posted here over the years about their failures were as Paul said... people with built "some" parts, and untouched 15yr old others.

And also a fair number at the same time were doing big launches @ the drags etc.

I've never seen a legit reason among many cars here to say a N1 isnt upto the task for moderate power ups.

Only people posting here without any idea of what thier build included or how they drive/treat the car mostly

and probably were wearing 13-15 year old rubber balancers on them that were doing little more than helping the belts go round on the front of the engine.

So many engines rebuilt with dodgy balancers slapped back on them without a thought.

I raced for over 3 years with an N1 at over 8500rpm not a problem. Engine was built by me and properly balanced with a new harmonic balancer fitted.

They are not indestructable but if engine is properly built and ran correctly they survive fine in a street application.

Yes the Tomei pumps are good...out of the aftermarket the Tomei and JUN are definately the pick of them.

I agree with Paul, we must have used over 30 N1 oil pumps over the years and not had 1 single falilue. Why not us? Carefull balancing of the engine and a decent harmonic balancer are the only answers I have as well.

Cheers

Gary

You can break ANY oil pump in an RB if you try hard enough!

We have broken them all... Jun, Tomei, HKS, N1, and standard ones too.

99.5% of the time it's due to the loose nut behind the wheel.

If you continually smash it on to the rev-limiter and it will break the pump.

If you are unsure why it broke (as no-one ever thrashes their new engines!), have a look at the drive faces inside the gear.

Tell-tale sign is wear on the driveside AND non driveside of the gear....thats what the rev-limiter/launch control does!

cheers

You can break ANY oil pump in an RB if you try hard enough!

We have broken them all... Jun, Tomei, HKS, N1, and standard ones too.

99.5% of the time it's due to the loose nut behind the wheel.

If you continually smash it on to the rev-limiter and it will break the pump.

If you are unsure why it broke (as no-one ever thrashes their new engines!), have a look at the drive faces inside the gear.

Tell-tale sign is wear on the driveside AND non driveside of the gear....thats what the rev-limiter/launch control does!

cheers

thats how we finally broke ours...3 years of flogging it to death was not a problem...it was when we changed the set-up to a ignition cut launch limiter...it broke on the 2nd pass.

I agree with Paul, we must have used over 30 N1 oil pumps over the years and not had 1 single falilue. Why not us? Carefull balancing of the engine and a decent harmonic balancer are the only answers I have as well.

Cheers

Gary

http://www.skylinesaustralia.com/forums/Fa...view=getnewpost

for the record the roundy roundy bits went outside because the bore filled with water.

I will post a pic tomorrow of where the water came from...

:(

lol worst or most?

btw I don't think a n1 block is able to keep roundy roundy bits inside when they let go any more than a standard one is :P

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • I did a skidpan night at SMSP this week, it was much cheaper than $350. But yeah, you need to slap an LSD in that thing.  I put an OS Giken in the 370Z and it's f**king MARVELOUS even compared to Nissan's viscous LSD. So you're saying it's free now that it's a housing estate? 😂
    • Nah, the car seems to run exactly as it did prior, in saying this it does "seem" to be better down low, like more eager to rev, but that may be 100% placebo effect from intake noise But, I'm not worried about it at all, in the end it is a fairly low compression NA engine that has a well shrouded intake,  if it is getting hotter IAT I cannot notice anything negative performance wise from the seat of my pants thrashing it about on the street or sitting in traffic, so meh, car now now makes induction noise so I'm happy
    • Do you have an IAT sensor? It's worth checking it to see. You may be suprised how little gap you actually need to flood your engine with hot air. (I tape up my airbox for a reason) :p
    • @KinkstaahKrinkle paint the "silver" alloy, not the red filter frame Engine bay heat won't be a issue worth worrying about as the silver alloy blocks it off on 3 sides, as for the top, the bonnet seals most of it and the big OEM CAI intake snorkel is still fitted in its original position  I will head into Clark's Rubber when I have some time to grab some pinch weld to tidy up the alloy after I paint it As for performance, I honestly wasn't expecting any, the only reason I got it is because the intake noise sounds cool to my old ears when I'm feeding it the beans Sometimes it's the silly things you do in in life that gives the most fun, and I do love anything that makes cool car noises In other news: I survived 4 nights at sea with Jackie not throwing me over board, holidays are continuing now as we are currently chilling at the Beachcomber in Toukley, after taking the coast roads from Sydney in the MX5, top down all the way, Toukley is where I spent a good deal of my youth holidaying during the summer months, there's lots of reminiscing going on,  and lots of beaches and old houses to visit Next on the list is to head to Batemans Bay for a few days, but we will take the Commodore out to stretch its legs, then Commodore hasn't really moved for months
    • There’s probably people who’d like to do it and then when it comes to putting their hands in their pockets they’ll all disappear into the shadows 
×
×
  • Create New...