Rb30 Standard Crankshaft Modifications And Information

[mambastu]

Hi all,

The standard RB30 crank is a hefty lump of metal. What can be done to improve it ?

Are many people modifying the crank to reduce reciprocating weight and/or reduce windage ?

If so how much weight can be taken off safely and does anyone have any pictures of the work they've had done ?

Lastly if people have replaced the crank oil way plugs with grub screws what size grub screws have they used ?

[StevenCJR31]

i think you will find the crank is fine as it is from the factory for most uses on this forum

[KiwiRS4T]

Its probably because its a hefty lump of metal that people can build 500hp engines with RB30 bottom ends that have done 250,000km without regrinding the crank.

[sriver killer]

Hi all,

The standard RB30 crank is a hefty lump of metal. What can be done to improve it ?

Are many people modifying the crank to reduce reciprocating weight and/or reduce windage ?

If so how much weight can be taken off safely and does anyone have any pictures of the work they've had done ?

Lastly if people have replaced the crank oil way plugs with grub screws what size grub screws have they used ?

http://www.skylinesaustralia.com/forums/topic/377415-my-2530-build-before-and-after-results/

I have done the following above. Remove castings, streamline crank + rods.

Took quite a bit off. Works on single cylinder motor bike engines lol but is a waste of time on the old rb.

The time and effort + money needed can be spent else where IMO

[MRHD66]

Just get it balenced!!