Rb30 Blocks R31 V's Vl

[chairman]

i have 2 bare rb30 blocks, one from r31 other from vl

i notice skyline block is heavy than the vl one

skyline 62.1 kg

vl 57.2kg

from digital scale

would the skyline block have more meat ?

Edited January 10, 2012 by chairman

[JonnoHR31]

are both blocks in the exact same state? they should be the same, unless its an early vl block, which might be slightly different but 5kg is a lot more than i would have thought.

[chairman]

both bare blocks, never machined

both oil/water lines

looking to use the skyline due to more heavy = more meat in block

Edited January 11, 2012 by chairman

[bubba]

5kg is a significant difference!

Sure it's not an RB20 block?

[chairman]

both 100% rb30

even have the single cam heads to be 100%

i did here skyline were made from better cast iron and vl cheaper but dont know

[bubba]

Interesting.. I'd use the heavier block

[045HOW]

both 100% rb30

even have the single cam heads to be 100%

i did here skyline were made from better cast iron and vl cheaper but dont know

I believe you but RB20 did come in Single cam and looks the exact same

Moreso you should go by the Cast of "RB30" on the side of the block and the engine number.

[chairman]

good man,

vl block says rb30 ends wit A6

skyline says rb30 ends just wit A

im going to use the skyline one and pump 40psi wit 26head see how it goes.

[James_03]

40psi hey lol.

[045HOW]

40psi hey lol.

So long as he has a 50PSI rated boost guage, he should be sweet just in case there are any spikes

[Adriano]

vl block says rb30 ends wit A6, skyline says rb30 ends just wit A

Interesting, can anyone explain why?

Edited January 17, 2012 by Adriano

[JonnoHR31]

afaik the a6 was just so you know its not an a8 (vlt) block. seeing as all 31s were NA (with 1 exception) there was no need for the number anymore?

edit: OP, does the VL block have the machined section where the tensioner relocation goes?

Edited January 17, 2012 by JonnoHR31

[045HOW]

afaik the a6 was just so you know its not an a8 (vlt) block. seeing as all 31s were NA (with 1 exception) there was no need for the number anymore?

edit: OP, does the VL block have the machined section where the tensioner relocation goes?

What exception is that?

[Lacky]

I believe this be the exception

[045HOW]

Sure it was a 30? And factory turbocharged?

[chairman]

both blocks have the machiined flat tensioner hole and has oil/water lines

[JonnoHR31]

Sure it was a 30? And factory turbocharged?

yer thats the one i was talking about and yes its a factory 30e+t high comp motor from memory.

it definately sounds like a s2 block then, which means it cant be some early production block that for whatever reason was lacking somewhere.

[chairman]

also notice skyline block had # 2 on the block next to oil dain back and vl had # 1

nizpro 300hp pre litre rb26/30 " using early rb30 block vl thicker bore there for stronger ?

[MRHD66]

Anymore info on the 2 blocks

[monty_r33]

40psi hey lol.

my rb30/26 was running 6.1:1 comp with cp dish top cp pistons making 490hp on 20psi. 40psi would be fine on this comp setup just up the timming