Closing And Opening Degree...

[nissan200sx.dk]

Hi all..

I need to find this info:

When my inlet cam begins to open, at what degree in crank rotation. And when it is closed again, at what crank rotation.

Engine is R33 RB25DET series 1. Std cams, std cam gear.

Thank you very much.

[blind_elk]

Opens TDC, closes 60ABDC. Duration = 240

[nissan200sx.dk]

Thank you very much.

[nissan200sx.dk]

Hmmm.. Does it BEGIN to open 0 TDC? Or is it fully open at 0 TDC?

I need to know when it will begin to activate the intake hyd. lifter on cylender 1...

This is so I can setup my cams correct to the crank after my RB25/30 build.

Edited November 11, 2009 by nissan200sx.dk

[D_Stirls]

unless it's a clearance engine you'd be having issues if the valve was full open at TDC. It'll crack at TDC and be closed at 60ABDC.

i.e. 0 + 180 + 60=240

[nissan200sx.dk]

Dooooh!

I saw under the RB build sub forum, in spools imports crank thread some computer predictions people made were the value for intake cam was 12 degrees before TDC.....

You are sure it begins to open at 0 TDC? So when i put my measuring device on intake cam bucket, it should begin to move when piston 1 is 0 TDC? Is this correct understood?