1974 911s 2.7

[al lkosmal]

I have a a nice 1974 2.7S engine. The engine number is 6342343 which was used for 911S and U.S. Carrera engines. This is, I believe a one year only configuration. Early , simplified CIS (like the 73.5) but 2.7 with early heat exchanger headers, etc.
Also, these were rated at 175hp vs. the 165hp of the later middies.
What is the value? any increase in value due to the one year config, higher hp, etc.?

Runs great and leak down is 4-6% on all cylinders.

https://youtu.be/I1QQVyT0We8

PS: I am ready to modify this engine and build it into a RS+ spec....but...and it's a big butt.

[racer]

The reason for HP loss on the 75-77 was emission controls. The engine was the same iirc. Take off the exhaust/emissions, put on an 11blade fan and they are the same.

Price? well, many shy from the 2.7, especially since the 3.0 and 3.2 offer more HP and TQ to begin with. Those with a certain project in mind may want the Mag case of the 2.7.

[Rick Brooklyn]

Any chance you can track down the chassis it belonged to?

[al lkosmal]

Thanks for the feedback......but, I'm not trying to determine the relative value of a 2.7 vs a 3.0 or a 3.2. or mag cases to aluminum cases. The pro and cons are well known. However, I am trying to determine if, due to the one year only configuration, by serial number, of the 1974 2.7S engine, if there is added value. While it is true that it is essentially the same as the later 2.7s...the 74 configuration of the 2.7S is unique and the serial number may potentially be of added value to a 74S or U.S. Carrera owner..... trying to match the correct type/serial number to their 74 resto project...............

regards,
al

[Rick Brooklyn]

Originally Posted by al lkosmal

is unique and the serial number may potentially be of added value to a 74S or U.S. Carrera owner..... trying to match the correct type/serial number to their 74 resto project...

Agreed. I sound like a broken record but middies (74 in particular) have finally come into their own and can be worthy of being brought back to life.

The thing is though, in the dark old days so many of these cars were left to rot and parted out that there's a good chance that chassis is long gone.

[al lkosmal]

rick...true, the middies were dissed so badly that many are gone. however, my first 911 was a 77 and it was a great car. Really an excellent blend of early 911 and the later SC/Carerra. I kept if for 15 years. Also, the 2.7 engine, once the known issues have been addressed, are great engines and one of my favorites to build into 911 hot rod engines.........

https://www.youtube.com/watch?v=EWB99lddFew

PS: The last three 3.0 engines I rebuilt all had broken head studs.........so , although they are touted as one of the best 911 engine..and I agree.....even they have their weakness..........

[pmax]

Originally Posted by al lkosmal

However, I am trying to determine if, due to the one year only configuration, by serial number, of the 1974 2.7S engine, if there is added value.

CIS was tweaked every year or other year during its era so I doubt there's any added value of the one year configuration.

Now if you can match it to the original chassis, then we are talking otherwise it's just another 2.7 engine.

[al lkosmal]

Originally Posted by pmax

CIS was tweaked every year or other year during its era so I doubt there's any added value of the one year configuration.

Now if you can match it to the original chassis, then we are talking otherwise it's just another 2.7 engine.

Agreed...no question that the most value is matched to original chassis...however I expect there is also value in having the correct S/N range for the 74S or Carrera chassis, even if not an exact match...not as much, but more than an incorrect year or configuration.

regards,
al

[mark 74 carrera]

I agree. I think the engine would be worth considerably more to a US Carrera owner. You could post a thread with the engine number and see if you get a buyer.

I agree with the comments about how few of the middies are left. They are great cars.

Mark

[al lkosmal]

I have a a nice 1974 2.7S engine. The engine number is 6342343 which was used for 911S and U.S. Carrera engines.

I build 911 hot rod engines and I am ready to modify this engine and build it into a RS+ spec....but...and it's a big butt.....this is, I believe a one year only configuration. Early , simplified CIS (like the 73.5) but 2.7 with early heat exchanger headers, etc. Also, these were rated at 175hp vs. the 165hp of the later middies. A very cool engine, as is........

Runs great and leak down is 4-6% on all cylinders.

https://youtu.be/I1QQVyT0We8

Any interest in this engine, as is, from the Carrera U.S. crowd or should I just forge ahead and defile it.?

regards,
al

[Rick Brooklyn]

Don't defile it! Try to see if you can find the chassis

[Matt Monson]

Defile it. Its just an engine.

[al lkosmal]

Opinions differ .........and I may put it up for sale, as is....... but not for long....there doesn't seem to be much interest in it, in it's current state..........it is way more fun and in my nature to defile it.

regards,
al

[Matt Monson]

One of the beauties of 74 in many of our eyes is they are smog free everywhere. If I had the stock 2.7 in my car instead of a 3.2 you can be sure when it came time to rebuild it I would build it RS spec. Its period correct. It is invisible and reliable. So why not?

[pmax]

Originally Posted by al lkosmal

Opinions differ .........and I may put it up for sale, as is....... but not for long....there doesn't seem to be much interest in it, in it's current state..........it is way more fun and in my nature to defile it.

regards,
al

Engine parts are consumables. There's nothing to "defile".

So have some fun with it ... especially so since labor is free in your case

[Last911]

How much do these engines go for? Actually, any good running 911 engine would do right about now