Details about a 1966S

[210bhp]

Mine is older........
3054XXS

Regards
Mike

[Haasman]

Here is a little known fact, and I believe the change took place with the 1967 cars: Right inside the exhaust pipes flanges (both left and right) there were small ridges welded in to reduce horse power slightly. It was my understanding this was done because autos at that time were insured in Germany by horsepower rating. These flanges lowered the rated horsepower within a particular HP range.

On my 65/66 car (#302580) I did this and the difference was significant in engine response.

[NeunElf]

Here is a little know fact, and I believe the change took place with the 1967 cars: Right inside the exhaust pipes flanges (both left and right) there were small ridges welded in to reduce horse power slightly. It was my understanding this was done because autos at that time were insured in Germany by horsepower rating. These flanges lowered the rated horsepower within a particular HP range.

On my 65/66 car (#302580) I did this and the difference was significant in engine response.

Bruce Anderson talks about such exhaust restrictors in Porsche 911 Performance Handbook on page 56 (second edition) right after describing the 40IDA-3C carbs with a stamped "S". According to Bruce, the new exhaust system developed for the 911S added about 10 hp to "normal" cars in Model Year 1967. According to Bruce, Porsche wanted to maintain a roughly 30 hp difference between the "Normal" and "S" engines so they added restrictor rings to the exhaust. About November 1966 Porsche switched to a milder camshaft and removed the exhaust restrictors.

[sc1]

Hi Eric and Elferhelfer ,

The first day of production for the 911 s was the 21 th of July in 1966 . My S is one off them , vin 305133s.

regards,

Michael

[911T1971]

VIN 305141 is in France..built July 21th 1966 (MODELYEAR 1967)
http://www.early911sregistry.org/for...ess+67S+french

This is xxx141 with Ferry Porsche

[Milou]

I noticed in Essen that cars were often presented by built date and not model year which drove me crazy. It took me a while to fully intergrate the difference between the calendar year and the Porsche model year and I thought I was up to speed and now more and more people are going back to built year.

Yes a 1966 911S never existed, alhough they technically did, but let's stick to model years for clarity.

Has the topic been discussed here? Just kidding

PS: Apologies for disturbing the original discussion of this thread

[rmfent]

I own a late August build #3056XXS comes with IDA's. Happens to be an aga blue SR coupe.

[Mark111]

I own a late August build #3056XXS comes with IDA's. Happens to be an aga blue SR coupe.

Pictures please, I am currently starting the restoration of my 67 S, build date May 67' Aga blue and will have a few personal touches (sports purpose look)

Thanks mark

[sc1]

stock aga blue 67,

[Flunder]

OK, here is a question that has had me wondering for the past several years.

What is the difference in the early chassis that would account for the footnote on the Werks Service Bulletin Nr.2 5/67 regarding roll bar installation that states that fitment of a roll bar subsequent to delivery is not possible on an S chassis prior to ch. nbr. 305758?