The three numbers Frank just listd are stamped into the back surface of the cam. Like somebody mentioned earlier, you need a small dental mirror to see it. If you are replacing a single cam, get the same number. The intake and exhaust cams come in sets, where one's odd and the other's even.

If you're doing both cams, you can get just about anything as long as the numbers on the cams are from the same set (24 goes with 23, 57 goes with 56 and 71 goes with 70).

But since you have a euro 280sl, the right cam will be aggressive in a good way.

-CTH
PS. Frank are those three numbers all euro spec valve timing?

__________________
- cth350@gmail.com
http://www.111lakeside.com/

Re: M110 Cam Numbering

Although the V-8 engines M116/117 use cams that are numbered in even/odd pairs that correspond to their placement on the left and right banks respectively, the cams for the M110 do not follow that convention. Even and odd cam codes are to be found in both inlet and exhaust positions; examples: (Inlet codes - 25, 67, 74, 33, 91) & (Exhaust - 24, 57, 71, 78, 20, 95)

The exhaust cam codes mentioned earlier (24, 57, 71) are used in all variants of the M110, and share the same opening and closing points. The unknown information is lift, profile, and as a consequence, the area under the curve. The 78 code has the same duration as the aforementioned three, but is installed with earlier opening and closing points; it could be re-timed to match the others. The 20 and 95 codes have shorter duration; they were unique to 1973/74 Federal cars.

Finally was able to check cam number.

Exhaust cam # is 71

__________________
1989 Arctic White 190D 2.5l auto w/400E Brakes and a 5spd waiting for me to install

1977 280SL Euro M110/w 4spd

2001 Dodge Ram 2500 Quad cab 4x4
dyno 383hp / 916ft#'s

I thought I had the correct 71 cam for this car. A little more cleaning of the back surface before removing from the motor showed that it was an "M" rather than a 71.

I would have expected an L for Links. The other cam has the expected R for Recht.

Is the M a code for an oversized cam journal or something equally clever?

-CTH

__________________
- cth350@gmail.com
http://www.111lakeside.com/

Anybody with info on this

__________________
1989 Arctic White 190D 2.5l auto w/400E Brakes and a 5spd waiting for me to install

1977 280SL Euro M110/w 4spd

2001 Dodge Ram 2500 Quad cab 4x4
dyno 383hp / 916ft#'s

GD:

Per posts #15 & #17, it is the number codes that are significant.

If the letter codes had position significance the exhaust cam would bear the letter R (Recht), as it is located on the right side of the engine, and yet, per the above, the cam marked R was found on the inlet side of the engine, which is the left side!!