Oil Squirters

[GTRNUR]

Hi all,

I'm about to undertake building an engine thats not for a skyline, although I want to steel an engine design concept from the RB engine.

RB engines use an oil squirter for cooling the pistons from the underside. I want to use 4 piston squirters in each cylinder head on my VW race engine to spray the valve springs and lubricate the roller rockers. This is not a new idea, the V8 guys have been doing this for years and it adds life to the valve train by cooling the springs better as well as helps make the rockers last longer. They normally run a spray bar that are welded inside the rocker covers, and its attached to an external oil feed from a full flow system.

Does anyone have any pictures of the oil sqiurters, and how the bolt inside the block?

Cheers,

Ian

Edited April 28, 2007 by Vspec R33

[GTRNUR]

I'll add, the Mitsubishi ones i've seen from the 4g63 evo engines have a check valve with a tiny ball and spring inside them. This sometimes blocks and can hold the valve open, which is not good. Mitsubishi's idea is that the valves open above 40psi oil pressure to begin cooling the pistons. Then at idle the cooling is switched off due to the lower oil pressure, and lower engine speeds.

Do the Nissan ones do this as well, or something simular to control oil flow to the squirters?

Cheers again,

Ian