Rb26/rb30 Conversion Setup

[R324]

Hi all,

First of all, this is my first post in SAU, however, i've been reading a lot of posts on here and thank you very much for all the helpful information provided by all the members.

I'm in the process to a new project for my track car. And the purpose of this track car is mainly for Drift. Hence, it could be a different setup than most of the other conversion (Maybe?)

I am aiming for 350KW to 400kw at the wheel. And reliability is a major issue

Got a Rb26 head in my garage and about to purchase a RB30 block. Doesn't matter a series 1 or 2 as just the matter of drilling and tapping i assume.

However, as my main concern is the bottom end that should i fully rebuilt it or just recondition the standard RB30 parts.

I found out the RB30 standard parts are not ideal to high RPM rev, as i think they are only safe until 6500rpm. (Not good for drifting)

So if i rebuilt the whole buttom end with forged piston, aftermarket rods with standard crank, does that mean i can rev it up to 7500rpm or even 8000rpm safe?

Here are the specs i'm thinking in my mind:

Head:

RB26 Head (Pretty much bolt on to the RB30 Bottom End)

Need Oil drain back from head to sump.

Currently have N1s with standard maniford. Obviously have to use bigger turbo to achieve the target.

Prefer twin setup. Maybe Disco Potato ?

(Would like to have nice low torque and smooth top end power as well) Easy to handle :laughing-smiley-014:

Bottom End:

Oil Squirters? (Some say no, some say yes. I know it's hard to put them in but is it neccessary?)

Need good conrod bolt. (Any suggestion?)

Nissan Big Bearing will do the job.

Piston:

Should i run aftermarket? If so, which one? Some people put RB25 Piston with 20 thou, i think they are Wiseco. (Good Setup?)

If not, what would you all recommend?

RB30 Standard Piston? I know it's good to have they ceramic coatin the piston crowns and oil retention coating the piston skirts. But is this goanna be enough to handle the power?

So far i could not get the best compression result from my research. I think 8.5:1 is good? If so which piston i should use?

Conrods:

Should i use stand conrods and reinforce them?

Or

Should i use aftermarket conrods? If so which brand?

I found some conrods called SPOOL but wondering if anyone has use it before, Are they any good? On their website it rated 900hp plus.

Crankshaft:

That's the only part i could not find much information. Any suggestion?

Oil Pump:

Heard that standard GTR will do the job, but better to put a oil pump collar on it.

I am thinking to put a external pump as well.

I will convert to RWD, so i assume the RB25DET sump will bolt straight on to the bottom end. Correct me if i'm wrong.

Once again, thank you very much for reading this post. I know it's very long with so much question.

But any input or comment are welcome.

Cheers,

P.S. Anyone know where to get a cheap RB30 Enigne in SA? I found one for $395 from one of the wreckers. And maybe i can find one cheaper

Forgot to mention i had PFC dejetro (No AFM) and will upgrade fuel pump as well as injectors.

Edited September 20, 2007 by R324

[LiQuid IcE]

i dunno if this thread addresses your needs but with 280 pages of reading I guessing it might lol

http://www.skylinesaustralia.com/forums/in...c=15420&hl=

One day I'll read it.

[R324]

Yea i read that post the other day, however, it is using factory piston and rods to suit his power range.

Hence, my aiming power will be a bit over the standard piston and rods can handle i guess.

ALso in that post, it did not mention anything about the crank as far as i read.

But thank you very much for the direction, i will have a good look again.

Any other comments?

[TTT]

yeh... read the "WHOLE" thread instead of the first persons first post.

what you are suggesting has been done by over a dozen people in that thread above.

don't be lazy.

or at least go in to that thread a search within the thread.

see just down the bottom left here..

it says "Enter Keywords" and then the "search Topic" button..

do that in the 280page thread about the RB30/25/26 hybrids.

[R324]

Thankx for that.

I read about 40 pages of it, have better idea now.

However, since everyone are mainly talking about 25 head so it's abit lack of information on 26head and crank.

But i will keep reading the rest of it and hopefully i can find some answer.

Cheers,

[2BNVS]

Piston: CP rb26/30 specific ( i use the 8.3 comp (1.2mm gasket) as i run bigger boost) go the 9ish cr for the lower boost/streeter

Conrods: Argo with arp 2000 bolts

Crank: Get it balanced and nitrated if money is there

Oil Pump: Jun/Trust/Tomei with collar

[R31Nismoid]

Thankx for that.

I read about 40 pages of it, have better idea now.

However, since everyone are mainly talking about 25 head so it's abit lack of information on 26head and crank.

But i will keep reading the rest of it and hopefully i can find some answer.

Cheers,

There is 26 head info, the first 40 pages had good info.

However a fair portion of more info in depth comes later in that thread.

Its almost progressive, the more pages you read the more indepth the thread goes as people find out parts/test things, so-on and so-forth.

Please take the time to read it end to end.

I doubt you'll have a question left after it

There are also a few other 26/30 threads around... cant remember the usernames off the top of my head however

[James_03]

Another thing to note is that some rb30 blocks do not have a machined flat surface where you need to install the idler.

Depending on how you do the belt setup, if you drill and tap the tensioner above the water pump be sure to get one of the blocks with a flat surface for the idler, otherwise its a real pain. The blocks that don't have a flat surface have a protruding gallery here and when the idler is torqued it will sit off center.

I think vl blocks all have this but some r31 skyline blocks do not.

[R324]

I'm looking forward to get VL block. So hope this will make thing easier.

Another 10pages done..... Take a while and my brain start confusing again lol...

Is there any way i can print the entire thread? I tried the options, download Word document or print friendly version, however it doesn't seems like have all the post in there. At least the last post was in June 2003.

Just getting a really bad neck pain if i read all 280 pages in front of the laptop.

Cheers,