My Rb25/30 Build

[MRHD66]

hi im doin a RB 25/30 specs include :

spool RB30DET (DOHC) Rebuild Kit CP 9:1 , RB head oil drain kit, Camtech 268/272 cams , RB25det head , RB20 covers, oil pump spool, crank collar, turbo manifold 6booost,

RB26dett plenum, HTA GT3586R turbo , water pump N1, R34 RB25det 5 speed gearbox

some pics :

RB30 as i got it

RB25det head as i got it

RB25det head sittin on the RB30 block with the RB20 covers and with a modiffied KKK turbo just for looks!

will add more pics as i go

CHEERS Oscar

Edited June 29, 2012 by MRHD66

[Mitcho_7]

How is the rb26 plenum going onto the rb25 head? Pretty sure they aren't compatible without a shite tonne of modifications.

Also, you should have put this in the build section!

[MRHD66]

How is the rb26 plenum going onto the rb25 head? Pretty sure they aren't compatible without a shite tonne of modifications.

Also, you should have put this in the build section!

power tune do a manifold adapter kit that I will be using

[Mitcho_7]

oh ok, i havent heard of that.

HOw much do they charge for the adaptor?

[MRHD66]

800 bucks u can get a aftermarket plenum for that

[The Dan]

Say hello to water leaks

[MRHD66]

Say hello to water leaks

how so mate

[The Dan]

how so mate

The water galleries are offset from one another so the plates need to mismatch to create an angle. You cannot use a gasket in between the two halves as it will block the outer one

They may be ok but from personal experience they are a complete f**k around to seal properly. Most people just use a tonne of silicon but that can block the water gallery and present its own problems

They may have changed the design since I saw the last one though so put up some pics once you get it

[Mitcho_7]

Would it not be easier to go a plazmaman/greddy plenum instead or get a 26 head?

[The Dan]

Would it not be easier to go a plazmaman/greddy plenum instead or get a 26 head?

Yes. Getting a 26 head would save a lot of time and money

[MRHD66]

Would it not be easier to go a plazmaman/greddy plenum instead or get a 26 head?

I don't want a RB26 head it don't have VCT!!!!

[The Dan]

Here's one I prepared earlier

[MRHD66]

Here's one I prepared earlier

how much f#cking around Is gettin VCT to work on a RB26 head

[The Dan]

how much f#cking around Is gettin VCT to work on a RB26 head

For me.....none at all.

I'm not suggesting you go RB26 head but there are no gains by going RB26 plenum and throttles. In fact, your tuner is going to have an extremely hard time making it run nicely. You have essentially lengthened the intake runner by another inch or more which creates all kinds of problems with air bouncing back from the valve head and transient throttle at lower revs.

You are definitely better off with a Greddy or similar.

[MRHD66]

For me.....none at all.

I'm not suggesting you go RB26 head but there are no gains by going RB26 plenum and throttles. In fact, your tuner is going to have an extremely hard time making it run nicely. You have essentially lengthened the intake runner by another inch or more which creates all kinds of problems with air bouncing back from the valve head and transient throttle at lower revs.

You are definitely better off with a Greddy or similar.

how much it cost to make RB26vct and do u use a RB25neo intake cam? I know it's not just cam too Edited June 29, 2012 by MRHD66

[The Dan]

how much it cost to make RB26vct and do u use a RB25neo intake cam? I know it's not just cam too

It's about $2500 with the head off.

No we designed our own custom camshafts. It's also important to consider valve clearance so not something I would recommend attempting at home

[MRHD66]

It's about $2500 with the head off.

No we designed our own custom camshafts. It's also important to consider valve clearance so not something I would recommend attempting at home

yeh mate I will get all that done when I get the VCT oil feed welded up

[MRHD66]

Here's one I prepared earlier

how much dose it swing RB25 is 20 degrees I know that

[The Dan]

how much dose it swing RB25 is 20 degrees I know that

How sure are you?

[MRHD66]

How sure are you?

I that's what I've been told by afew ppl