Rb30 Vs Rb26

[felixy69]

is it just me or does rb30 seem like a low cost low budget made block

reason i say this is because i got an rb30 block and compared it to a rb26 block, seems like evveryting from design, casting to how it was made, a rb26 seems to be far better.

the rb30 i got has really shitty casting,

rb26 has side ribs to prevent it from twisting. and rb30 don't.

seems to make sence as rb30 was never in any expensive cars to begin with....but i would never thought nissan would cheap out like that

just a thought.

[Adriano]

is it just me or does rb30 seem like a low cost low budget made block

reason i say this is because i got an rb30 block and compared it to a rb26 block, seems like evveryting from design, casting to how it was made, a rb26 seems to be far better.

the rb30 i got has really shitty casting,

rb26 has side ribs to prevent it from twisting. and rb30 don't.

seems to make sence as rb30 was never in any expensive cars to begin with....but i would never thought nissan would cheap out like that

just a thought.

Yep, rb30 bloocks arent as good as the twincammers, though there are plpenty of them making 1000hp without dramas. I dont think nissan did the casting, probably done locally by holden

[ish]

Dont you go hating on the RB30 to Much mate ...

With aftermarket bolt ons they were in there original form good for about 500ps + before any internals needed to be changed...

I do have to agree with you that they were a budget engine though for the market and pre the Rb26 era but bang for buck still awsome!!!

they cant be to bad if people hunt them down to bolt there 26 heads on

Edited June 30, 2007 by ish

[sh@un]

I dont think nissan did the casting, probably done locally by holden

nup- Nissan

[Cubes]

My Rb30 block had more ribbing than the old RB20DET block. Casting quality etc looked the same; all fairly smooth, no massive dags anywhere.

The RB20DET block only had ribbing across the bottom half of the block where as my RB30 block had both ribbing across the bottom half and also up inbetween the bores.

Your comparing apples with oranges. The RB26 block is a 4wd block.

Much like comparing the regular SR20 rwd block to that of the SR20 4wd GTIR block. Considerable differences.

I've attached a couple pics of the rb20 block and rb30 block. So in many ways apples with apples. Any one care to share the same left/passenger/torque side of the rb25 block?

[N I B]

Proven strong reliable Block so why worry?

[RB30-POWER]

they are all from the same family (RB) and all made in JAPAN

its fair to say the RB26 was cast thicker in some areas to help with the 4wd system that is used by it in particular, as mentioned above.

and just looking at them will tell you jack f**k about the metals properties used in the blocks.

rb25 block pics attached for cubes

[Cubes]

Thanks

Interesting.. The RB25 block looks almost identical to the rb26 block.

I wonder what the engineering theory behind ribbing vertically inbetween the bores and a ribbing horizontally through the center of the block is.

Not the best angle but u can see it looks the same.

[sh@un]

RB30 block is plenty strong

Don't forget it's made out of iron and has dry liners- not a weakass wet liner alloy setup.

[Adriano]

The machine shop that did my rb30 told me about 10 times that they are rubbish compared to the other rb's. I just ignored him, as i wasnt going to give up my project based on his experience of metallurgy. He said the quality of the material was inferiour.