the K series engines

[yip]

first i must apologise for this, as it may be a dumb question,

i have heard that with the nissan RB series engines you can use a rb30 block and stick a RB25 head on and you increase compression and create more grunt, is this true? does it only work with a turbo?

if this is possible then can it be done with a 4K block and a 3K head????(will they match up?)

OR is this all Bollocks?

any info would be great as im trying to learn more

Cheers

[diss7]

it'll be too much effort for so little reward; theres 2 5k's in the busell this week; put one of them in and watch the wheels peel when you hit 2nd,

[starlet drifter]

yep they will, but try and get the 3k bigport head if ya can

[AE85.6]

ye can be done but if there are 5ks round for sale at da mo try snap one up they make a good grunt upgrade over the old engines and can be sourced from newer vehicles etc than the starlet or corolla engines, if i still had mine i could have sold that to you but sold it to a mate sorry, and its a piss easy transplant aswell

[yip]

yea the 5K is an option, but arnt they quite expensive compared to a 3,4K?
may b a 5K with 4K head?

how do i identify a 3K bigport?

thanks