Rb25det Half Cuts

[kx2fity]

Hey guys I realize this has been covered in an older post but it didn't adress a few questions i need to know!

Firstly who has brought a halfcut in perth (rb25det) for a GTS-T? $$$$$$? turbo/manifold or just basic engine?

Anyone had one imported? Import taxes etc cost?

I got quoted $1700 for the basic engine yesterday (thus use my own turbo manifold etc) compression 160 x 5 and 150 x1! does that sound alright? I dnt think it 2 crash hot!

Ive worked out i will also need aout $400 worth of additional parts!

And how much would my old engine be worth 140000km, wouldnt be worth jack hey? (maybe for a rebuild project)?

I am seriously thinking about doing the work myself! I know that may sound a little silly but i do have a motocross backround and have rebuilt a number of bikes and i think i could nut it out!

Has anyone jumped in and done conversion themselfs with little mechanical background like myself?

has anyone got someone to do it for them? cost?

Anyone out there prepared to give us a hand ?(paying offcourse)

Rebuild vs Refresh vs halfcut? opinions

Thanks guys,

Dan

[R32 Driver]

what exactly are you trying to do?

just replacing the engine with a fresher one?

half cuts in perth would be $3500-4000

thats engine, gearbox, wirin loom, turbo, manifold the lot

i think hyperdrive charges around 1k to replace an engine (dun quote me on this, it was a while ago)

rebuild with forgies would set you back 5-12k depending on parts

but if you only need your engine for daily drivin and mild mods a replacement is good enuff, if ur chasin big power get a rebuild

or go for a rb25/30 rebuild (2-3k ontop of the rb25 rebuild)

[simor32]

yeah would also like to no wat goes down.

[fr0st]

If you already have an RB25 why not buy a RB30 bottom end (~$100) and rebuild it with nissan parts (~$900) and put it back together again. Add your head studs and gaskets on top of that and you have a new engine of monstrous proportions (300rwkw on a stock bottom end has been done).

Go read the RB30 thread in the FI section... cmon do it... you know you want to

[mitchy_]

i'm swapping my dead 25, for a fresh 25 at the moment.

and im not the most mechanically minded of people either

admittedly its taken me a while (i've been lazy as i have a company car, and rarely drive my skyline...)

but its not as hard as you think..

remove all the intercooler piping, radiator, etc etc..

unbolt air con and p/s pumps, take out radiator, remove all the wiring loom, heater hoses, fuel lines, exhaust, remove driveshaft, unbolt engine and gearbox mounts, and its essentially out.

[simor32]

whos got them in stock now??? anyone no.

[N I B]

Ben at I think its KPR or something close but his on president street welshpool and has just landed a pile of import parts.

[MMM]

i personally would go for a rebuild... how long before this "newer" engines decides to die

[kx2fity]

what exactly are you trying to do?

just replacing the engine with a fresher one?

half cuts in perth would be $3500-4000

thats engine, gearbox, wirin loom, turbo, manifold the lot

i think hyperdrive charges around 1k to replace an engine (dun quote me on this, it was a while ago)

rebuild with forgies would set you back 5-12k depending on parts

but if you only need your engine for daily drivin and mild mods a replacement is good enuff, if ur chasin big power get a rebuild

or go for a rb25/30 rebuild (2-3k ontop of the rb25 rebuild)

Yeh mate compressions down in 6th so I guess Im just preparing for the inevitable! I mean the car could last me quiet a while longer if i drive fairlly sedately for majority of time; however as you know it is a skyline and thats no what they were made for! haha and who am i to argue with manufacturers! haha

Yeh so Im trying to decide how to best spend money!

Do a buy a 2nd hand 25Det stocky with say under 80k on the clock with decent compression for what $2000 and thus just replace my engine????

So yeh i dnt need a halfcut really , i was just thinking it would be nice to have some spares and new gearbox without a 4th gear f**kd syncro, but chances are 2nd handy will hav same prob!

I cant see myself being able to rebuild the engine (and it pritty pointless to replace with OEM when for k more can chuck in sum forgies)! so looking t about $6000 but then i guess the skys the limit with Hp!

Or do i simply refresh my engine for what $4000 provided pistons and cylinders are still in good nick!

I would also like to state that I'm not after too much over 300hp and would be quiet happy just to get to 300, so do I really need forgies and a rebuild???????

[kx2fity]

If you already have an RB25 why not buy a RB30 bottom end (~$100) and rebuild it with nissan parts (~$900) and put it back together again. Add your head studs and gaskets on top of that and you have a new engine of monstrous proportions (300rwkw on a stock bottom end has been done).

Go read the RB30 thread in the FI section... cmon do it... you know you want to

This is possible? and healthy? haha Im headn over now to check out thread! I am intrigued 300rwkw mwahaha

[kx2fity]

i personally would go for a rebuild... how long before this "newer" engines decides to die

That is a good point! Risky business! But whos to say rebuild will last there is no such thing as warranties on turbos! I mean yeh you obviously get parts warranty but shit I think its risky whatever way you go???????

[fr0st]

This is possible? and healthy? haha Im headn over now to check out thread! I am intrigued 300rwkw mwahaha

Have a quick look at the RB30 Results thread. I think it was cubes saying that when he used a stock RB20 turbo he made 100kw by 2000 rpm and a max of 180 at 5000 rpm (iirc). A larger turbo should shift the power curve towards the redline and stop the wheelspin

You won't get 300rwkw off the stock turbo however.... or stock engine management... or stock fuel system. Theres alot of money thats goes along with it. And those prices don't include labor, thats if your building it yourself.

It's not a cheap exercise, but if your thinking of building rebuilding an RB25. I dout it'll cost any extra to do the RB30 instead.

[mitchy_]

im thinking about rebuilding my dead 25 as a 30...

seeing as its only the bottom end that is dead...

we shall see.

[michael87]

Ben at I think its KPR or something close but his on president street welshpool and has just landed a pile of import parts.

Its KYP by the way, I highly recommend them. They got a new shipment in last week I think.

-michael

[fr0st]

im thinking about rebuilding my dead 25 as a 30...

seeing as its only the bottom end that is dead...

we shall see.

Did I mention that someone else made said 300rwkw on a non-rebuilt stock RB30 bottom end. Bet it was the best $150 he spent on his engine

We could always drop it into my 32... I got a R33 gearbox in there already just screaming for an overpowered engine

[kx2fity]

Have a quick look at the RB30 Results thread. I think it was cubes saying that when he used a stock RB20 turbo he made 100kw by 2000 rpm and a max of 180 at 5000 rpm (iirc). A larger turbo should shift the power curve towards the redline and stop the wheelspin

You won't get 300rwkw off the stock turbo however.... or stock engine management... or stock fuel system. Theres alot of money thats goes along with it. And those prices don't include labor, thats if your building it yourself.

It's not a cheap exercise, but if your thinking of building rebuilding an RB25. I dout it'll cost any extra to do the RB30 instead.

Yeh had quick look those results are bullshit! Im intrigued now Im going to have to have a better look into it now, theres quiet a few things im not understanding! But i guess upgrading the stock turbo; engine management; fuel system is inevitable either way if im headn for some decent Hp!

I just started reading the "R33 RB30 Conversion by JNR24" ha 231pages and yeh it is way way over my head I think i have a lot to learn, maybe i will read my manual front to back and try grasp better understanding of components!

By the sounds of it it would be "HUGELY" beneficial if i was to rebuild ;rebuild with the RB30!

[Kaido_RR]

fix the problem with ur engine

you can even rebuild with stock parts from nissan to keep the cost down

you wont need much to make 300rwhp once ur engine is OK!

[kx2fity]

' date='9 Nov 2006, 01:01 AM' post='2653450']

fix the problem with ur engine

you can even rebuild with stock parts from nissan to keep the cost down

you wont need much to make 300rwhp once ur engine is OK!

True but a refresh to get my compression back up to where I want it will cost $4000+, provided no cylinder or piston damage (no way of knowing)!

On the otherhand I might pick up a better 25det for $1500-$2500 drop it in myself and save $2000! Still there is no way of knowing what kind of life engine has had!

[R32 Driver]

well a rb30 rebuild would cost a lil more then the rb25 rebuild by the time u fit it and have new oils lines and random things done

but think of the torque !!!!! also if u just get another rb25 and use rest of your money on perforamnce parts like turbo, ecu, fuel pump, clutch, etc

u can achieve 300rwhp faily ez and safely on a rb25 stock internalz

[kx2fity]

well a rb30 rebuild would cost a lil more then the rb25 rebuild by the time u fit it and have new oils lines and random things done

but think of the torque !!!!! also if u just get another rb25 and use rest of your money on perforamnce parts like turbo, ecu, fuel pump, clutch, etc

u can achieve 300rwhp faily ez and safely on a rb25 stock internalz

A little more?? Reading through FI threads and sounds like it not too expensive?

Haha the Torque!!!!!!! Yeh that would be nice, take a GTR or what? haha

Yeh I was thinking bout your second point all i need is ECU (power fc $950) Turbo kit (decent one what $2000-2500) and everything else i have already put in car 'clutch, fuel pump, timing belt! will need injectors tho (lots of 2nd handys around tho)!

Do I settle for 300, thts the question!