Weight of 911 camshaft -- have it handy?

techweenie · techweenie's Garage

I don't have a scale and need to know for shipping... I did a search and couldn't find the info.

TIA

Has anyone ever drilled 911 camshafts to reduce mass? Seems to me they are pretty heavy compared to other engine components...

Grady Clay · 02-23-2009, 10:27 AM

2.57 kg each (CIS T)

Best,
Grady

techweenie · techweenie's Garage

Quote:

Originally Posted by Grady Clay

2.57 kg each (CIS T)

Best,
Grady

Thank you Grady. They sure seem heavier than that...

Grady Clay · 02-23-2009, 11:08 AM

OE 1973.5 911T CIS cams, non-center oil, 3-bearing, large nut type
Left = 2615 g, right = 2570 g

Has anyone converted these cams to center-oiling?

Gun-drilling the cam should be easy.
Drilling the cam lobe with carbide or laser should be OK.
What roll-pin for the cam hole?
Critical is the face seal (OEM NLA?)
Chain cover mod?

I’m not sure I would go farther than OE center oiling to reduce mass. Cams break easily.

Best,
Grady

RWebb · RWebb's Garage

if it really is "easy" then it would be nice just to reduce wt.

some manf. is pressing lobes onto hollow shafts now, but I fergit who.

I got 6.1 lb. for a 3.3L stock DME cam, RH side...

techweenie · techweenie's Garage

Are there better (newer) materials than iron for making cams? What are the characteristics necessary for cams to work? At high RPMs, are cams effectively 'hammered' by rockers? Does that mean resistance to harmonics is the highest priority? Just wondering.