GTR crank n rods into GTST

[R32-GTS]

Dont worry about SK just build what you want and having the 25 head it is still more an RB25 than a 26.

[93RPS13]

will the con rod fit in a RB20? thanks

[RNS11Z]

i used standard 25 crank gtr rods wiseco pistons... 400+rwhp reliable... still kicking along today almost a yr later with frequent thrashing

[browny]

will the con rod fit in a RB20?

No. RB20 big end is 48mm. RB25/26 big end is 51mm. The length may also be different. I am waiting on a sample RB20 rod so that I can compare.

[cameron]

what about chucking a RB26 head on the RB26 internaled RB25 bottom end ?

[Cubes]

It wouldn't be worth the expense involved.

[sweetr33]

started to pull things off the motor yesterday, only spent 3 hours on it but got a fair bit done. will keep people who are interested posted

[Steve]

Rb30s nastie anyway.

Have you had bad experiences? why dont you like them?

[R32-GTS]

Rb25 has a better power curve than a 26 head so leave it on.

RB30? where do you start?

[BBQ]

Rb30's need a few small modifications first eg needs oil lines tapped into the block for the turbo, I'm also not sure how strong the crank would be on an rb30 to handle 300rkw.

Machining costs mite be expensive as their is more work needed.

I'm current getting my Rb25det machined with arias forged pistons, rb26 rods and keeping the crank standard. Its costing me heaps, buy the time you but all parts and put it all back in, it becomes a motor reliable motor, and should have no probs handling the power out put your after, If tuned well. But if you have the money to put an rb30 bottom end in I would recommend it as their are good benefits. But to make the motor reliable and strong you would have to spend a lots more all round to make that happen.

[Cubes]

Rb30's need a few small modifications first eg needs oil lines tapped into the block for the turbo, I'm also not sure how strong the crank would be on an rb30 to handle 300rkw.

Machining costs mite be expensive as their is more work needed.

That depends what RB30 block you get. SII block has all the provisions for the turbo.

Apart from that the only other modifications required depends on what cam belt you use.

[Cubes]

Its a little off topic but just to compare how tough the RB rods are:

Here's a little snip from a bloke i'm exchanging pvt messages with.

He's got a RB26 with a GT40 thats almost done.

My brothers is running 300rwkw at the moment and is only using stock rods, and I'm pretty sure it would be able to handle 350rwkw, just excessive revs may decrease their life span dramatically.

Hopefully we will be aiming for near 400 so we will be able to work out what is going to go first in a standard (although brand new and balanced) bottom end.

Generally most workshops will start upgrading the rods once they near 400rwkw. Although PSI03L has been running shotpeened standards for a while (nearly 2 years) and that has been running in excess of 500rwhp.

Hopefully my rods handle 300rwkw maybe just a little more with no problems.

[predator]

car came with rb25det = rebuild your old engine, you got most of the stuff you need anyhow.

new engine = may as well go rb30det.. torque torque

-but joel aren't you/haven't you got yours shot-peened as well??