Camshafts

[MikeSimon]

I am putting my head back together and I have a question about cams.
The original cam in my car is marked 02. The part-number on the shaft only says 114 01
I have another cam that is marked 01 and the part-number is more complete as 114 051 0101
I read through the Technical Manual and cannot find anything on the cam. Anybody?
Also, does anybody know why on some cylinder heads the compression ratio number is not there (or removed?)

[Pawel66]

114-051-0201

Please go through this thread: https://www.sl113.org/forums/index.php?topic=1228.msg6141#msg6141

02 is a nice Euro shaft, I htink.

[MikeSimon]

Pawel:

I know, the 02 is a Euro camshaft because it is original to my  Euro 71 SL. It is just that the short number stumps me.
And the other camshaft is not 114-051-0201. It is...0101. I saw that there was a mention of the 01 shaft being a detuned US version

[Pawel66]

I know the short number is confusing. I bought this camshaft at MB 3-4 years ago, did not take the picture...
The MB PN is correct though.

Yes, 0101 is de-tuned 02. From my notes at that time:

- 05, 08, 01 - US shafts, angle open 130-122
- 09 early Euro A1800510935, angle open 142, different bearings than later one
- 02 A 1140510201 late Euro, different bearings, angle open 140

Enclosing specs, but there is no reference to PN.

This is the study I made at that time. Then I was studying how to tune it in.

[ja17]

Ah yes, the study looks familiar

[Pawel66]

Really??

[MikeSimon]

The more info I am getting the more confusing it is for me.
There is a write-up in the tech manual and Peter Lester is being quoted several times.
There are contradictory statements about 02 and 09 regarding which one is the earlier and which is the later, improved cam.
If 09 is the later cam, why does my car, manufactured in December of 1970 has an 02 cam?
This would add to the mystery of the cylinder head, which has unique markings and part-number and has a 9.0 compression.
The study is difficult to read, I will try to print a larger copy.

[Pawel66]

Mike,

From the EPC for 113044:
US
   
A 180 051 08 35 Camshaft for both manual and automatic with SA 12207 (air pollution control system). This is the 08 one.

World (you have to switch off filters to go around shafts for pollution control 08 and 05)

A 180 051 09 35 (that is the 09) with notes:

As of engine: 981 10/50,20/60 000012 ALSO INSTALLED ON 000010 981 12/52,22/62 000109 ALSO INSTALLED ON 000005, 000037, 000045, 000053, 000079, 000085, 000088, 000092, 000095- 000102, 000106.

Up to engine: 981 10/50,20/60 000348 981 12/52,22/62 002320 983 10/50,20/60 005924 983 12/52,22/62 010241

Replaced with  A114 051 02 01 +1 A 114 586 04 05 (repair set)

A114 051 02 01 Camshaft (that is the 02) with a note:
As of engine: 981 10/50,20/60 000349 981 12/52,22/62 002321 983 10/50,20/60 005925 983 12/52,22/62 010242

Maybe this helps.

[MikeSimon]

So, if I read this right, 02 is a later camshaft than 09. The remarks that 09 is an improved material 02 is incorrect ??

[ja17]

Yes, correct.

[w201190mercedes]

Can I put a euro cam in a 280sl US motor?  will this add Hp or torque?    Do I need to cheage the cinder Head? I already have a Europe injection pump.

[ja17]

You can use a Euro cam on a USA motor. It will work fine with your cylinder head.  A little increase in power will be noticeable.

[w201190mercedes]

I thought so, I have an European Cylindered to. When I rebuild the engine I hope to squeeze some more out of it in a few years. I Talked to someone that used an Hot camshaft ,larger valves, lighter pistons and gained 25 to 30 hp.  He bought his parts in the US But I don’t know where.

I could not find an Hot camshaft, did someone find tuning parts for an m130?

[MikeSimon]

I must say, I have driven many cars and motorcycles for competition and played with cams, pistons/compression and fuel supply to "squeeze" more horsepower out of stock motors.
My experience is, you have to do a lot or something significant to get a "noticeable difference" in performance. Looking at the lifts, duration and overlap of the various W113 cams, I cannot see anything that will yield a recognizable performance increase. The same is true for anything regarding piston size.
You will have to put forth a good effort and quite some money to get 30 additional hp out of a M130 motor. Porting, larger valves, a completely redesigned and reground camshaft, together with an increase in compression ratio to something like 10.5:1 could yield a result you will feel driving.
Please consider, that the output tolerance of any internal combustion engine in a standard manufacturing process is about +/- 5%. That means your stock motor lies somewhere between 160 and 180hp. While the nominal output as given by the factory is in 99% of the cases the ideal and maximum it will put out. That's why tuners talk about "blueprinting" motors.
The performance difference between Euro and US motors is more than just the cams.
Also, consider that contrary to what Mercedes claimed through the end of production, the late M130 motors had only a 9.0:1 compression ratio. That's why you usually will not find the compression ratio number cast on the heads on late versions anymore.