The Death And Birth Of My Rb30 25Neo

[bokee]

hey guys i thought i would share my story with you all, therefore am starting a build thread

A little bit of background of the car, ive owned the car for only 3 months, this used to be my friends car for over 7 years so i know everything thats been done and how its been driven.

he has originally build the engine, well at least he thought he had but he got a bit shafted, both of us found this out when the engine failed and i pulled the engine apart.

car mods are

rb30

25 neo head

mild cams not sure on the specs exactly but the way it idles it would be somewhere with the 250-260 duration with a lift of 8.9 (which ive calculated)

NO VCT used

GARRETT gt3788r turbo

3inch exhaust with twin mufflers,

turbosmart hyper gate 45

Haltech plug in platinum pro

PE 850cc injectors

nismo adj fuel pressure reg

walbro intank pump with 044 external + surge tank

greddy copy intake manifold ported and machined for perfect fit

trust intercooler

ill upload a few photos and keep you all updated of the future build that am going to do over some period of time

Ive made 320rwkw before the engine let go but you dont expect stock pistons to last much at that much power

Edited June 17, 2012 by bokee

[bokee]

This is where it all started when i bought the car of a mate,

this is how he had it set up

[bokee]

This is where it all started when i bought the car of a mate,

this is how he had it set up

the red inlet manifold and plenum with standard throttle body is now for sale, asking 150 and pick up from syd liverpool

[bokee]

So ive decided to buy a copy greddy inlet manifold and a surge tank with bosch 044 of another friend,

ive painted the rocker covers in wrinckle black and turbo in matt black

also added a oil catch can

after fitting it all and runing in a small problem with the copy manifold and vct line which wasnt used, we managed to grind off a bit and still retain the vct aftermarket line, in case i decide to run the vct.

here what it ended up looking like

to me much nicer well am a sucker for black lol

[MRHD66]

Run VCT !!

[Manuel Kasko]

Probably should chuck this up in the builds section. Lots more people who are building similar things hang out there and can give great tips.

Love the look of a tough high mount

Good numbers as well

[bokee]

Probably should chuck this up in the builds section. Lots more people who are building similar things hang out there and can give great tips.

Love the look of a tough high mount

Good numbers as well

oh shit i just realised its in the wrong thread

not the biggest computer person is there a way of just transferring it to build ups or just start another new topic with copy paste thing

[Mitcho_7]

oh shit i just realised its in the wrong thread

not the biggest computer person is there a way of just transferring it to build ups or just start another new topic with copy paste thing

With any luck a mod might move it for you

[bokee]

so one day i noticed that my car had a different cranking sound i let it go for a week or so didnt think of it much at that time, i honesly thought the starter was on the way out, but when i noticed that my oil catch can was half filled with oil i realised that something was not right, it was either excessive blow by engine not breathing properly so i went and checked that it was breathing properly. it all checked up alrite i went to check the compression it was dead even in first 4 cylinders of 180psi of pressure i thought to myself oh ok the engine is good but when i went to check it on 5th it only had 65psi of pressure, ohhhh shittt. the hunt then started for the failed cylinder 5

started pulling things appart

inlet manifold off

rocker covers off

manifold and turbo off

it was getting preety late so i called it a night

[GTScotT]

im guessing your expecting to find it wasnt built after all?

hope it turns out to be a monster tho that turbo should be huffing over 400kw with ease

[bokee]

If anyones wondering y am doing everything on the car is that i didnt have an engine crane at the time, i sold my old one ages ago thinking ill never need it again and here i am lol. ive ordered one but had arrived a bit too late.

so the next thing to do was to take the head off to see any physical damage that could be seen in a cylinder bore, head or piston.

when i took the head off i didnt see much at all except a bit of oil in the troubled cylinder

[bokee]

im guessing your expecting to find it wasnt built after all?

hope it turns out to be a monster tho that turbo should be huffing over 400kw with ease

after pulling the head off first thing i saw was the piston design and it made me wonder the same thing, at the end it wasnt built well it was but with standard items

[bokee]

well since i still didnt get my crane i had to do it the hard way, i just shouldve gone to another shop that had one in stock but oh well

yep thats right take the piston out and see what the drama is.

when i took the piston out i could clearly see a couple of things, first the ringland of the piston has cracked/broken and the second they are stock rb30 pistons hmmmmmmm

sniff sniff you smell that?

Bullcrap

heres a few photos

ohh yeah

am sure many of you can confirm that these pistons are standard

genuine rod you cant really tell if its been shot pined or not

[bokee]

the only thing that has been changed was the rod bearings, ARP rod bolts and arp head studs

maybe the engine was freshend up with the ACL rb30 kit which u can pick up for around $800,

I measured the cylinder bore and it was standard

ive been told today that it was definatelly forged, the workshop that my friend got it off got it off of another guy whos originally built it, if this makes sence so basically workshop has bought this block of the X guy and then sold it to my friend thinking that it was properly build but anyways am starting to confuse myself

ARP rod bolts (good stuff)

rod bearing

cylinder bore

it measured exactly 86.00 the first time i measured it indicatind it definately hasnt been honed

[bokee]

FINALLY when i got my engine crane i pulled the block out of the car

its called just the bay now no engine in it

getting the rod bolts undone all pistons out

oil pump and water pump off

[bokee]

And final update for today is that ive ordered a forged rebuilt kit from spool imports

this kit is with the h beam rods but i upgraded and went with the I beams in case i decide to go over 450rwkw

cant wait until i start building

Also the workshop that had sold my friend the engine (my engine now) said to send him the block back and he shall put forged pistons and hone the bore, event hough he said hes gonna do all that i still went and bought this kit, so after everything is done i might have a set of spare pistons and rods

[MRHD66]

Did you get 9:1 CP??

[bokee]

Did you get 9:1 CP??

it will all end up being 8.5:1cr with cp pistons and 51thou head gasket combined

[Aberax]

Looking good, I am going to watch with most interest.

That turbo I bought off of you a few years ago is still going well , absolutely love it.

[MRHD66]

Ah ok cool I'm goin to get 9:1 cp on 98 fuel for my RB25/30