Thread For My Car Problems.

[lilcrash]

the target now is just reliability, my wife and i have just got some big news so cars are just for transport now. but considering forged pistons are easier to find il probably go that way. whats all this talk of getting forged pistons made to suit factory rings? is there something wrong with the rings they put with forged pistons?

i got a full 100k kit so ive got a new waterpump (old one is 50k old) the oil pump is a concern though. ive read something about n1 pumps being faulty, just a rumour? dont really think i need a tomei pump.

crank collar? whats that about?

Edited December 27, 2011 by lilcrash

[Tangles]

N1 pump will be fine mate. By all means reuse your water pump if its in good condition.

an aftermarket crank collar machined to suit the crank makes sure the oil pump doesnt shatter at high RPM's, only needed if looking to rev out the engine to redline - if you arnt going to hit the track, drags or bounce off the limiter then it isnt needed, same goes for the Tomei sump baffle kit.

Forged pistons come with rings to suit.

Decent deals on atm for Neo CP pistons/rings - http://www.ebay.com.au/itm/CP-Pistons-RB25-RB25DET-Neo-R34-ER34-86-5mm-Bore-9-0-Compression-/200683838099?pt=Motors_Car_Truck_Parts_Accessories&hash=item2eb9b05a93

ACL bearings - http://www.ebay.com.au/itm/ACL-Race-STD-Rod-Main-Bearings-RB26-RB26DETT-Skyline-R32-R33-R34-GTR-/300639873296?pt=Motors_Car_Truck_Parts_Accessories&hash=item45ff886910

oh, and congratulations on your 'news'

[lilcrash]

I'm watching a set of cp pistons in an 86mm size, should I just get an 86.5mm set incase my bores aren't perfectly round?

I plan on replacing everything I can, might as well do it while it's apart. Just had heard recently made n1 pumps were faulty.

Just not looking to replacing my clutch after only 15k stupid excedy garbage. Probably go to npc this time and get a clutch made to suit the engines power.

[Bond]

You have gone from a budget turbo upgrade to a forged rebuild. If you just want reliability now that you have some news, why aren't you just putting a stock motor in and just tuning it to a nice reliable power level and leaving it at that? You will get none of this back when you go to sell it. I hate to be negative but it's still not too late!!

[lilcrash]

I just see a rebuilt motor as a more reliable option then an unknown km second hand motor. I'm already half way through the rebuild anyway so no point stopping now. Considering how much money I've spent on the car now I dont think I could sell it, at this point il be keeping it until atleast 2019 just to get the use out of it.

While I'm on here, how many people have rebuilt their cv shafts, are they expensive?

[SargeRX8]

I just see a rebuilt motor as a more reliable option then an unknown km second hand motor. I'm already half way through the rebuild anyway so no point stopping now. Considering how much money I've spent on the car now I dont think I could sell it, at this point il be keeping it until atleast 2019 just to get the use out of it.

While I'm on here, how many people have rebuilt their cv shafts, are they expensive?

On a RWD with the ATTESSA its not that expensive if you do it your self. Depending on how shaggered they are, you can get new joints for about $50 a side, then you need the grease and the new boots. Get a CV shop to check them out see if they are still rebuildable and if they sell the parts you need.

[Bond]

I'm already half way through the rebuild anyway so no point stopping now

What exactly have you done to your engine so far? Has all the bottom end been machined up?

[Rolls]

second hand motor is definitely the better option, especially if you are just getting randoms to put the rebuild together, highly doubt it will be any more reliable.

[Bond]

second hand motor is definitely the better option, especially if you are just getting randoms to put the rebuild together, highly doubt it will be any more reliable

This is exactly what i was thinking. I'm going through this myself with my Nissan Patrol. I bought a built motor and a 180,000km stocker (not that high km for a big low revving 6 cyl and only $150) . Both are now pulled apart and the stocker is in so much better condition. All the hone marks are still there and everything all in spec. The built motor has turned out to be a crap and not built well at all. If everything is done right and by some1 who knows what they are doing then yes the built motor will be a better option and be more reliable but that will cost you $$$

[Rolls]

Exactly, either go a second hand motor, or spend $10k on a long block from red r racing, rips or any of the other major workshops that pump them out almost as often as nissan did.

[lilcrash]

so far my head has had the full treatment, block hasnt been machined yet but will be machined to suit whatever size pistons i buy. im not getting randoms to assemble it, a machine shop will be boring the block/installing new pistons and bearings then bolting my head on. after that i will put it it in the car as it will be easier to get in it that way, then bolt on all the ancillaries.

at the moment im looking at what pistons to buy, i also have to buy a pair of engine mounts, get a clutch made and get my cvs looked at while they are already out.

[jet_r31]

Fit a standard Rb25 oil pump, f**k the N1's, unless you feel like overcomplicating it, or cause more trouble for yourself...

cheers

darren

[Bond]

a machine shop will be boring the block/installing new pistons and bearings then bolting my head on

Unfortunately there is a lot more to it than that. Will they spend the time get all the tolerances spot on? There is a difference between putting an engine together and building one properly. Your head is done and can be bolted on to a stock bottom end. What power is your turbo meant to put out? Heaps of guys are running 300rwkw on stock bottom ends with no dramas as long as the tune is in order. If it lasts you a year or 2 then buy another bottom end as the head will still be fresh.

You really need to listen to guys on here that have done it all before. You haven't spent any money on the bottom end yet. How much do you think it will cost after you buy the pistons??

[lilcrash]

I thought neos used an n1 pump?

My turbo is a hypergear atr43 ss-1. I'm planning on running about 220kw at the wheels.

There is no way that I will be buying a second hand motor, my wife won't let me waste that much money for more problems.

I trust my machine shop to do a good job.

[Hanaldo]

Buy a second hand motor from a Japanese wrecker mate. Building your motor is going to be a massive waste of money for your plans.

[Bond]

Your absolutely mad for building a forged motor for 220rwkw. Put some stock pistons in and be done with it. Why would you listen to your wife when it comes down to building an engine?? Is she a mechanic?

[Bond]

Can you please write down what each option will cost you and study the numbers a bit.

What is the engine builder charging you to machine and assemble the bottom end?

[DVS JEZ]

Why would you listen to your wife when it comes down to building an engine?? Is she a mechanic?

HAPPY WIFE HAPPY LIFE.

[Bond]

Ha, that's what pussy whipped guys say. Happy for her while you cringe at what u have just given in to... I'm sure if she knew how much money will be wasted she would be a little more un happy!

[lilcrash]

you are probably right about the forged pistons, i dont actually need them, but until i get a price on some stock pistons the cp pistons are looking like a cheap enough option, my engine made 220kw on 14 psi last time so it just sounded like a safe number for now. hell on the dyno if i can find a good enough tuner i might make the 250kw that the turbo is claimed to be capable of, but for now a nice safe tune is all i need.

i under stand fully why buying a 2nd hand motor is a bad option, thats why im not really considering that an option, i could buy an unknown km/condition 2nd hand motor and it might only last a few weeks, id prefer to spend $2000 building a brand new internal motor, keeping my matching numbers block in the car and having it built for alot more power then i will ever make with it. then i will know that nothing is going to break in a few months time.

i will weigh up my options about the pistons and im pretty sure stock pistons will be fine for my goal, just at this point i havent seen a price on a set of pistons from nissan.