Rb34 On Sale

[R31Nismoid]

From memory I think Tial make a divided housing for the 35/82.

Weren't they odd sizes though?

Again from memory

[zebra]

nah, Tial only do the Stainless V-band housings

[r33_racer]

You reckon the ultimate rear housing would be a divided tial s/s concoction? Im sure the tial v band s/s housings must have some benefits other then easy attachment to the manifold and stainless to retain thermal energy.

[zebra]

They way I look at it is: The WRC and Lemans spec Garrett motorsport turbos run a V-band housing.

Surely if there was a huge advantage with the twin-scroll turbos they would be using them

[r33_racer]

Thats a fair point.

[bigmikespec]

We've machined up a few rd blocks with the nitto 3.2 crank. the only feed back we've heard is 1 got under 8 seconds down the quarter (methanol nos 60psi and sohc, dedicated drag car)

You have been using RD28 blocks?

[FineLine]

You have been using RD28 blocks?

Tuffer than a gtr500 block with ultra thick cylinder walls and extra webbing everywhere.

bit of dicking around to match to a twin cam head and about as heavy as a 30 block or even heavier but strong as all getup.

A mate has been thrashing the shit out of a 3.2 litre built on this block making over 700 at all 4 for 3 years or more. Bombproof!

[r33_racer]

about 9kg heavier then rb30 block. pretty well what noel said. They have extra casting in the bottom end and walls are considerably thicker. Perfect for monster hp.

[Marko R1]

I've heard this before about the rd28 blocks and the additional weight is a small price to pay for a street car!

[Gerg_R31]

Ill weigh up the rd block and rb30 then the rd after its filled

the other benefits is the rd blocks have oil squirters

[WHITER33GTS-T]

What sort of price to build a RD28 block with 3.4 stroker kit to run a 26 head...?

[GTRNUR]

Im pretty sure that most of that strength advantage of the RD28 block begins to dissapear once you start boring and stroking them. The only thing that would help a little is the external coolant return from the head near the back of the block on the right side.

The standard bore being 85mm does make the cylinders thicker, but in order to maintain coolant flow between the cylinders in the block, the OD of the sleeves is still around 92-93mm maximum. So 4mm cylinder wall thickness at best with a 85mm bore.

The ability to run the squirters would dissapear with larger strokes as well unless you were to slot the crankshaft like an OS giken crank, or like I did when fitting my modified RB30 crank to the RB26 block.

You have to clearence the sides of the block for the rods when the stroke is greatly increased. See the attached picture and how close the No3 rod bolts are to the side of the case, and the required case clearencing. This is an RD28 with a 90mm stroke. There will be 1mm clearence from the rod to the crankcase. The main caps are billet alloy and the main studs are offset drilled from the standard 10mm holes, to 14mm. The standard RD28 cradle wouldn't clear the 90mm crank.

Being in Australia its really hard to pass up on the RB30 block just for how easily they are obtained and adapted to an RB26 head. In my opinion, there are other opportinities such as sleeving that people should really consider a lot more befoer heading down the RD28 conversion path.

[r33_racer]

Ive seen that picture somewhere before. Very tough setup.

[bigmikespec]

Ive seen that picture somewhere before. Very tough setup.

Stop drinking and do some work!

[GTRNUR]

Ive seen that picture somewhere before. Very tough setup.

Possibly on the GTR UK forum. Its from an 8 second R32 GTR in Urkaine. He ran an 8.16 with this setup. A rod went through the side of the block though, and now a new engine is being built to replace it.

[r33_racer]

Yes. That sounds familiar.

Going to work today to finish off some stuff for my twincharge car! Then keep drinking when I get home tonight!

[Marko R1]

Possibly on the GTR UK forum. Its from an 8 second R32 GTR in Urkaine. He ran an 8.16 with this setup. A rod went through the side of the block though, and now a new engine is being built to replace it.

is the owner rebuilding another rd28 or making a switch to the rb30?

[GTRNUR]

is the owner rebuilding another rd28 or making a switch to the rb30?

He's keeping the RD28 block and replicating what he had with some improvements. Availibility of the block is the main factor though. RD28 blocks are easier to source than RB30 are for him.

[sikmatesubwoofa]

That awesome going from a 2.6 ltr RB26 to a stroked RB30 at 3.4 ltr, what a huge increase in displacement.

[TiTAN]

if you are talking about the R33_racers race car, that was a 3L already.