RS engine case stamp

210bhp · Post by **210bhp** » Sun Dec 18, 2005 5:35 pm

On each side of my RS silumin case, just above each case part number stamp, there is the stamp of a letter 'H' inside a circle. Does anyone know what this signifies?
Regards
Mike

hot66 · Post by **hot66** » Sun Dec 18, 2005 8:33 pm

nope

Mike, at this rate you are going to be more knowledgable than us Yorkshire folk

210bhp · Post by **210bhp** » Mon Dec 19, 2005 1:23 am

James
I find all this stuff facinating because this was a time of pride in automotive work producing what we all love..... cars with character. Craftmenship meant each car is an individual almost (or am I getting too silly?) Robots don't build individual cars anymore......progress?

The early s registry has turned up part of the answer to my question. The 'H' would appear to be the manufacturer's mark so now my quest is to find a name and see if the company still exists. Sad really but it keeps me off the drink(well almost)

Mike
PS Now the really sad bit.....what letter do you have on your cases?

Lightweight_911 · Post by **Lightweight_911** » Mon Dec 19, 2005 8:16 am

The magnesium cases have an 'M' on them denoting Mahle - they won an award for their crankcase casting back in '69 - it was the most intricate/complicated magnesium casting ever produced back then.

Dyno Soar · Post by **Dyno Soar** » Mon Dec 19, 2005 12:22 pm

Lightweight_911 wrote:The magnesium cases have an 'M' on them denoting Mahle - they won an award for their crankcase casting back in '69 - it was the most intricate/complicated magnesium casting ever produced back then.

Andy you ARE the bloomin ORACLE of Porsche knowledge.

Thats very interesting just as Mike 210bhp said.

Nice one.

steve wright · Post by **steve wright** » Mon Dec 19, 2005 12:31 pm

apparently it was also the largest single mag casting ever for a production series...

210bhp · Post by **210bhp** » Mon Dec 19, 2005 3:45 pm

Like I said, you just have to appreciate this type of craftmanship. There would be no 3D cad computer programmes which could rotate the image on screen back then. Hands on stuff to first produce the dies (I presume they would be onto die or pressure cast moulds) then to make, test, modify the dies, remake the case, machine, retest and so on until the finished case was an award winner as Andy says.
I know a little about this as my Dad was a toolmaker in the 60's and 70's. He made the dies for the production of precision parts for concorde. He would love all this stuff.
Sorry for the ramble
Regards
Mike