Specs For Os Giken 3 Litre

[Spoolup]

What are the specs for the OS giken 3 litre set up ?

Stroke ?

Rod length ( centre to centre ) ?

I am designing a stroker crank for the RB30 engine and want a comparison for rod length / stroke ratio.

Hoping for around the 3.4 to 3.5 litres out of the RB30

Any info appreciated.

Cheers

[Mandingo]

EDIT: OS RB30 = 86 Stroke RB31 = 88 stroke. They can be ordered with 87 MM pistons to make 3.2 but.

Edited December 17, 2007 by Flipmo

[Spoolup]

ok cheers - are they running rb26 rods or a custom rod ?

Dont get caught up in the reving thing - Twin turbo 5.7 litre holdens make 750 rwkw (1000 rwhp) and redline at 6 - 6.5k. XR6 Fords are making 600rwkw plus with similar redline. Big revs dont apply to forced induction so much as opposed to NA engines.

Cubes count :-)

Edited December 17, 2007 by Spoolup

[Mandingo]

Power = Torque X RPM My friend

Taken from An OS ad I found somewhere:

OS Giken has the ultimate upgrade for your RB26. These complete pre-assembled bottom-end kits are rated to handle power outputs up to 1400hp.

The RB30 features 86mm stroke with a forged chrome-moly crank, forged chrome-moly SCM steel H-beam conrods and forged 4032 aluminium 86mm pistons. It is made using a new Nissan block and specially designed spacer and liner kit.

Special features not found in a normal RB26 include an 8-bolt flywheel pattern*, 22mm gudgeon pins and 23mm rod bearing width. Nismo black metal crankshaft bearings are used, with specially designed crank cap bolts. The bottom end is supplied complete with a metal head gasket, specially designed head stud bolts, adjustable timing gears, tensioner pulley and longer timing belt.

The RB31 features 88mm stroke and can also be supplied with 87mm pistons for 3.2 litre capacity. Normal combustion chamber volume comes to 10cc, but specially shaped pistons can also be custom-ordered. The RB31 is built using an N1 block, with the same specially-designed spacer and liner arrangement as the RB30, with an oil restrictor and piston cooler jets already fitted.

Not sure on rod length but mate.