How to verify I've got a B35 cam?

[LarryM]

I just purchased a camshaft which supposedly came from a 1988 E32. How do I make sure this is indeed a true B35 cam?

Devinder's cam chart shows a B35 has 10.41mm / 10.36mm lift at the VALVE.

I've miked the lobes; I'm not sure I'm getting an accurate measurement on the true base circle but from what I see the lobe lift is about .304" (7.66mm). Does this sound about right?

The only number I see on it is a casting number (looks like 1-705.7751) which is probably shared with the B34 cam.

[EuroGeorge]

I just purchased a camshaft which supposedly came from a 1988 E32. How do I make sure this is indeed a true B35 cam?

Devinder's cam chart shows a B35 has 10.41mm / 10.36mm lift at the VALVE.

I've miked the lobes; I'm not sure I'm getting an accurate measurement on the true base circle but from what I see the lobe lift is about .304" (7.66mm). Does this sound about right?

The only number I see on it is a casting number (looks like 1-705.7751) which is probably shared with the B34 cam.

All I know is the cams are all the same from prod date 6/87 through 3/94. This would include the last of the M30B35's used in E32's and E34's. P/N 11311287606.

[LarryM]

Since it was reportedly removed from an E32 I'm assuming it's indeed a B35 cam, but I'd like to verify it. The timing gear mounting flange (item #4) is still mounted on the cam, and is held in place by the big nut (item #6). That nut is torqued to over 100 ft. lbs. and I have no way of removing it right now. Would the cam part number be stamped somewhere on that end of the cam, behind that flange?

The other end of the cam only has a "K" stamped on it.

http://www.realoem.com/bmw/enUS/showpar ... Id=11_4621

[Tnarkowicz]

I also understand the B35 cams are the same spec as that in the high compression Euro B34 (But different from the low compression B34). Not sure if its the same part number though.

[LarryM]

Well, a big thanks to Ralph in SoCal who informed me the rocker arm ratio on an M30 is 1.4:1. Using that figure I was able to project the lift at the valve and confirm this is a B35 cam.