R33 Rb30 Conversion

[Veilside-SaU]

Ok , so from reading this im guess a rb30(n/a) bottom end will not just bolt straight in....

i have a rb25det (automatic) in a R33 gtst i dont wanna change driveline .

Will my box fit? will the engine mounts match ? its a great thread but im just looking to bolt on the rb30 bottom end without changing pistons and grinding galleries? is this possible???

thanks in advance

Edited January 14, 2007 by Veilside-SaU

[Adriano]

yes, its all in the thread.

[Adriano]

just to add guys my cp,s in the rb26 run .35mm clearance. they do slap a little when cold.but that at 4 degrees,,

I think you mean 3.5 thou, .35mm is 14thou, it would slap the skirts off

[rockabilly]

sorry your right. 3.5 thou

[Scooby]

Guys:

I'm mating a GTR box to an RB30, anyone know for sure if I need an RB26 or RB30 spigot bearing? Or are the the same?

Any advances on the T306 belt fitment yet?

Cheers

Edited January 28, 2007 by Scooby

[r33_racer]

Im pretty sure all spigot bearings are the same. rb30, 25, 20 and 26 identical. Ask for an rb30 spigot bearing...chances of finding that are probably better as its from an australian car...some automotive stores dont know any better. Ask for a 26 and the list will only say rb30....and the pimple faced kid behind the counter will say 'sorry sir the computer only lists one for an rb30 out of a vl commondore, cant help you...'

Idiots...annoying sometimes.

[Spoolup]

rb30, 26 and 25 are all the same.

rb30 ones are less than $10

[Scooby]

Thanks guys!

[Adriano]

or UAS sell a spigot bearing upgrade, better than the bush, i think its about $40

[r33_racer]

is that an actual needle roller spigot bearing?

[Scooby]

is that an actual needle roller spigot bearing?

i think so from what I understand, not sure about the value or durability

[sarapussy]

Hi guys just a question regarding the oil feed for the vct,what size does the hole in my bsp fitting need to be? I'm looking at 1mm is that to small?

CHEERS

Edited January 19, 2007 by sarapussy

[Adriano]

1mm is ideal

[sarapussy]

1mm is ideal

Thanks Mate!

[Godzilla33]

RE: Belt sizes.

Just been looking on dayco.com.au, heaps of belt options.

94843: 153 teeth, STP8M pitch, 25mm wide (not that it needs to get any longer)

94407: 152 teeth, STP8M pitch, 25mm wide

94604: 151 teeth, STP8M pitch, 25mm wide

94777: 150 teeth, STP8M pitch, 23mm wide (this belt is equiv to gates t306,150 teeth)

94830: 149 teeth, STP8M pitch, 25mm wide (pretty much spot on for low low setup)

94109: 148 teeth, STP8M pitch, 25mm wide

94652: 147 teeth, STP8M pitch, 25mm wide (getting a bit short....)

Hope this helps a few people, Im gonna work out the best one for the low low tensioner setup for mine, will post up results.

Edited January 21, 2007 by Godzilla33

[Scooby]

beauty, i'm assuming the pitch is correct for our sprockets?

[humz]

hi guys i have these pistons

AP340754 Arias - Arias Forged Pistons Rb30 Non-turbo 86.5mm Bore Supplied With Rings

how good are they for this conversion???

what comp ration would it give with 1.5mm head gasket and rb25 vvt head?? and the block has been faced if that makes a big diff (not sure how much tho)

the non-turbo pistons are better for this conversion yee? or is that just the standard non-turbo pistons which are better??

whats teh differance in strength between the turbo and non turbo pistons?

[aphid]

hey guys, are the rb25 and rb30 sumps interchangable on a 33 conversion?, they look pretty much the same only the rb30 sump is a little taller

[r33_racer]

yeh..you can use either one.

[Godzilla33]

Hey Scooby,

yeah, pitch is the same as std RB30 belt, Im 99% gonna use the 149 tooth option with the low low 2 tensioner setup. Gives that bit more clearance between tensioners. My local Repco doesnt stock dayco, gonna try get one tomorrow elsewhere.