M103 question.

[fahrgewehr2]

The 103 motors that were put in the r129 SL were rated at 190hp. How were the extra 13hp achieved over our US car. I see the euro 103 motors are rated between 179-188hp in other applications.

Also, what transmission did the r129 300SL with the 103 motor use?

[Duke2.6]

There was one version of the M103 - a 3.0L that had a 10:1 CR, but I think it only was available in the first couple of years and not in the US. All others are 9.2:1.

Also, European power is rated under a slightly different standard than US SAE net, plus the ratings of catalyst and non-catalyst engines are usually different.

Duke

correct me if i am wrong, but the 103 was never intalled in a 129 U.S. europe or otherwise. only 6cyl was the M104

[fahrgewehr2]

As far as I know, no 103 powered 129s made it to the US.

Thanks for your answer Duke. I agree on the emissions equiptment. Do you know anything else about the German POS rating and how it converts to american HP?

Anyone know about the transmission used. I can't imagine the same 4spd was used in the convertable...I think they are much heavier, no?

[deanyel]

Euro 129s came with either 12 valve or 24 valve 3.0 liters - that is 103 or 104.

[Duke2.6]

Originally Posted by fahrgewehr2

As far as I know, no 103 powered 129s made it to the US.

Thanks for your answer Duke. I agree on the emissions equiptment. Do you know anything else about the German POS rating and how it converts to american HP?

Anyone know about the transmission used. I can't imagine the same 4spd was used in the convertable...I think they are much heavier, no?

LMAO. I think you mean "PS". We all know what POS means! I've seen some conversion factors, but don't recall them and didn't make a note of them. Sorry.

Duke

[manny]

Originally Posted by Duke2.6

LMAO. I've seen some conversion factors, but don't recall them and didn't make a note of them. Sorry.
Duke

I believe the german rating ( DIN ) is about 2 % higher than our SAE.

Originally Posted by carson356

correct me if i am wrong, but the 103 was never intalled in a 129 U.S. europe or otherwise. only 6cyl was the M104

i never would have believed it if i hadn't seen it this morning, a european model 129.060 300SL came in to the shop, it has the 103 engine installed, the engine is 103.984 and the transmission was 722.363

[fahrgewehr2]

Well that is settled.

Thanks for reporting.

[sixto]

Is it a regular 103 or an obscure 24 valve 103? I remember reading about a 24 valve 103 that wasn't a 104.

Sixto
95 S420
87 300SDL