Interesting & unknown details thread

[hot66]

I'm sure we had a thread years ago on this .. but with the loss of photobucket I thought it would be great to have a new one solely devoted to those interesting / less known details on early Porsches we all like to perv over

( this has been re inspired by the early horn button post viewtopic.php?f=2&t=61792 )

So, please post away pics & info , no matter how well known or unknown the details are.

examples ... the rear slam panel differences between a Sept-Feb production 73MY 911 & a March '73 onwards

[hot66]

My 1st one ..

the rear lower shock bolt differs in size on a 72-73 911 compared to earlier. Changes again for alloy arms.

M12 X 1.5MM X 85MM UP TO 1971 ( 900 082 018 02 )

M14 X 1.5MM X 95MM 1972 TO 1973 (900 082 049 02 )

M14 X 1.5MM X 85MM 1974 ON (900 082 054 02)

[Dougieboy1]

and dont i know it! I have been looking for a pair of original M14x95mm for my 1972 for a year as i refit steel rather then allow trailing arms!!


In the interests of contributing positively to the thread, the S spec front valance/bumper introduced in 1972 was initially made out of fibreglass up to chassis 911 230 0385 (coupe) and 911 231 0231 (Targa) when they switched to steel.


ps if anyone has 2 of the longer 1972 shock bolts spare, i am all ears.....

[964RS]

I could write you 10 pages on the 901 and very early 911 parts....

[hot66]

I could write you 10 pages on the 901 and very early 911 parts....

Genuinely would be interested in snippets posted every few days


Sent from my iPad using Tapatalk

[hot66]

A genuine 1973 Oil tank has an alloy spacer between the tank & the filter

[210bhp]

But the tapered connector from the flapper box to the air box should have a jubilee clamp at its lower end and the lower engine lid catch and bolts shouldn’t be painted body colour.


Regards
Mike

[stretch]

Can i play.

Did you know the original Cohline hose is still available to purchase. All your oil lines can be re-built if your into originality.

It's also worth noting that the hose is screwed into the aluminium fittings anti- clockwise.

Dave

[911GP]

So, please post away pics & info , no matter how well known or unknown the details are.

examples ... the rear slam panel differences between a Sept-Feb production 73MY 911 & a March '73 onwards

Following from the rear slam panel differences, there was an interesting thread on ESR re engine lid differences. I hope nobody minds but I have pinched photos and mostly plagiarised the following:

1969 lid -


Late 68/69 one year only 3 bar grill so the engine lid had fewer support tabs. Where the engine lid catch is mounted the central stem widens a little. License plate lights are cut into the lid.

1971 lid -


5 bar grill so more support tabs. Note also that where the engine lid catch is mounted the central stem widens more than previously.

1973 lid -


When the rectangular pressing was introduced on the curved rear slam panel, the same pressing was introduced on the engine lid such that the two would align when the lid is closed but not touch.

End of 1973/early 1974 G series -


License plate lights are no longer cut of of the lid. The central stem has two additional, larger holes added near to where the lid catch is mounted. Rectangular pressing on the lid remains.

After this -


Scallop introduced to the left hand side of the lid (maybe after 1976). On this particular photo the engine lid has been modified to have cut outs for the license plate lights.

Feel free to correct me with any of this and I'll edit accordingly.

Gitesh

[sladey]

I also understand that around 1973 or 1974 the bumpers may have changed on the 911. They became thicker and were made of marshmallow.

[hot66]

I also understand that around 1973 or 1974 the bumpers may have changed on the 911. They became thicker and were made of marshmallow.

I know how much original details are to you

[hot66]

I didn’t know the deck lid was matched to the new rear slam panel design

[Jonny Hart]

Ok, I found one today. On my '82 SC, the driver's screen vent has always had less air flow than the passenger, annoying as the passenger side is always clear first.

My first thoughts were that the flapper box was not operating as well on the driver's side. Having been through every HVAC related component in the car, could not find any fault.

Today I removed the plastic elbow on the top of the blend valve that connects to the screen vent. To my surprise, half the duct is blocked off with a deliberate half moon shaped web. This is part of the moulding, not an addition. I cut it out with snips and now it operates just as well as the other side.

Can someone explain why Porsche would make a half blocked plastic duct for driver's side of the screen? These parts are handed and my car is pretty original so I doubt it is a LHD part.

[sladey]

That’s interesting Jonny - I’m about to refurb some of my valves etc.

When I backdated the heat in my car I found the feed coming off the fan on the right hand side was effectively a slot, whereas not he other side it was a gaping hole. I added a bit of aluminium tubing to hold the slot open. I’m talking about the plastic elbow in the engine bay right next to the main fan

I guess they weren’t bothered about passengers!

[Jonny Hart]

One theory is that they set up the vents to favour the driver on a LHD car.

Slightly blocking the RH elbow would increase air flow to the left side of the screen.

Might be an SC thing so would be good to know if the 3.2 is the same.

On 993, the RH vent is also very poor compared to the LH one.

Definitely some 'leftism' going on here!