Differences between 911 and 911S
 

Hi,
I am french (my english isn't perfect, sorry...)

Does someone know the differences between a 911 and a 911S ?
(1974, 2L7)

Is the body different ? Tire size ? Interior trim ? Other ?


I only know the difference about the engine.

Ya whats up with that, I have a 75' 911S, and I can't seem to get a straight answer...

Welcome !

1974 came as 911, 911S and Carrera. All with 2.7-liters engine.

Tires: 911 front and rear 165/HR7015. 911S 185/HR7015 rear and front. Alt rear 215/VR6015.

Wheels: 911 5.5Jx15 steel front and rear. 911S 6.0Jx15 ATS "Cookie Cutters" front and rear.

Sorry, have no exact info on interior.

Cheers,

Many thanks !
Best regards
Pierre

Just checked my book and the biggest different was the engine power which you already know about. The 'S' having 175bhp as compared to 150bhp, both from K-Jetronic injection (Euro spec engines). The 'S' also had an oil cooler in the right front wing. They had the same brakes but the 'S' would have been fitted with 185/70VR15 tyres as compared to 165HR15 for the standard 911 meaning that the track width would be different. The bodies are exactly the same. Of course your 1974 car could be either a G or H series car, the way you can tell is that the G series car has fixed rear quarter windows. As far as I am aware there is not differences in the interior trim.

On my 911S, I have:
195 R15 tires (front)
215 R15 tires (rear)
non fixed rear quarter windows (H series ?)
175 bhp engine (911S)

Chassis number is 911 410 xxxx => G series / 150 bhp

Thanks
Pierre

Pieere, since you speak/are French...

are you asking about 911s in France? imported to the US? or to Canada/Quebec?

might make a difference...

Note there are emissions/engine differences for cars in Calif. vs. the 49-state versions of the 2.7L engined cars, and IIRC they apply to the '74 too.

you came to the right place.

The intake & exhaust ports are 32mm on the 911 and 35/34 on the 911S. I believe there is a slight difference in the compression ratio also.

Hi randywebb & CliffBrown,

I live in France, and I baught the car in France.
I think the car was modified, a long time ago.
(more powerfull engine, larger tires...)

Regards
Pierre

Maybe there really isn't a straight answer in the mid-years. I have a '74 911 which I undestand was ordered with all the "S" options:
6X15J Fuchs
18/22 MM swaybars
"s" front calipers
Konis
Optional guages in the dash.
It's apparently an "S" except for the engine ??

My question is, are the above items standard on a 74 911S ??

Jack

Here's a copy of 1974 Tech Data for the 911, 911S, & Carrera. Will try the pic again.

Can't get the pic to load. It is a copy of the 1974 sales brochure with all the tech info.

Email the pic to me (karolyi74@yahoo.com) and I will post it. This is how I understand things for '74:

The ROW cars were still the same as the US in terms of the models and their trim for '74, with the 911, 911S, and the Carerra. The 911 had standard brakes, steel wheels, and the 150hp engine (smog equipped in the US so ROW probably higher), the S has the cookie cutter alloys, 175hp engine, aluminum S brakes and oil cooler, and the Carerra had the rear flares. Equipment for US and ROW Carerras was the same, but the US came with the 911S 175hp engine instead of the true Carerra MFI 2.7 which was still in the ROW models.

In 1975 they didn't offer a base 911 in the US anymore, but they still did elsewhere up until 1977 I believe. Please correct any errors I have made.

Jay seems to have summed it up well. The CA cars did have the added smog/thermal reactors items and the euro cars had smaller bumper pads. My car is (I mean was) a 1975 by registration, with a build of 12/74.

Another thing I forgot to mention was that you could order all of the S options on the base 911, except the 175hp engine of course. This should answer your original question, Pierre. By the way, your English is very good. :)

The 1974 sales brochure will be fascinating if we can get it posted...

The S also has different, peakier cams (although not a solex or early-S style peaky, just more peaky from the normal 911).

I've seen two different style CIS 2.7 pistons as well, so perhaps they had different pistons/compression. Or, maybe they just changed the design over the years. My 74 pistons were a flatter style than the other 2.7 pistons I had.

Pierre,

I’ll second the welcome. You found the right place for
Porsche information. Your command of the English
language is very good. Some of us don’t english
so good. Perhaps we need an English-French-German
-Spanish-Japanese-more Porsche-speek dictionary. Wayne?

I have been reading this thread and reading the “Porsche
911, 911S, Carrera Service-Information Model 74” booklet
4527.21. I would post it but it is 66 pages and perhaps
200 images and diagrams. This is a Volkswagen of America
(VoA) US English edition so it doesn’t cover the Rest of the
World (RoW) 911s.

Some of the more interesting things that this reminded
me of are:

A ’74 911 Targa was standard with a non-folding
roof (similar to a 914 roof).

Finally Porsche delivered Koni shocks on the Targa.
Can you believe that as late as ’73 they felt the
Targa chassis was too flexible for Koni shocks?

This also reminded me that the ’73 Carrera RS was
only available as a coupe. In ’74 you could order
a Carrera Targa 2.7S MFI.


One error I see from the above posts is the brakes-
shocks configuration. Boge shocks were standard
equipment on all three US models and were fitted
with M-calipers GG (same vented rotors from ’69-’73).
Optionally were the Koni and Bilstein shocks and
both were fitted with the aluminum S-caliper LM
(same as 911E & 911S and Sportomatic from ’69)
in front for all three models. The really big (917)
brakes were only officially available on the ’74
911RSR 3.0. I’ll bet many were originally delivered
with these Factory fitted for “special customers.”
I saw one being fitted with center-lock wheels!


Gee, look at the ride height so the new bumpers could
match those of a Chevrolet or Citroen of the era.


http://forums.pelicanparts.com/uploa...1136405434.jpg
© Dr. Ing. h.c. F. Porsche A.G.

While the 911 is specified with 5 ½ x 15 wheels, my
calibrated eye tells me these are painted steel 6x15
in the above image. I think this is the last US 911
with standard steel wheels.


Best,
Grady

Here is the brochure pic that Wendell sent me. The Carerra came with 6&7" Fuchs wheels and blackout trim which I didn't mention earlier.

http://forums.pelicanparts.com/uploa...1136414739.jpg

Yep, last US 911 with steel wheels excepting the '76 912E, if you consider that a 911. I wonder if you could still get the steelies on the Euro base model 911 up until 1977. I know that you could still get a 4-speed, the 5-speed wasn't standard until the SC.

Base models were really "strippers" back then. I had a bare-bones '70 911T and it had simpler guages for oil temp and fuel, no oil pressure or oil level guages! I wonder if the base 911s had the full guages by 1974 or if they were still an option.