Non-matching engine in the '74 Carrera
 

Hi folks - on the 1974 Carrera Targa the engine number in the car is *6342026*.

Going off an engine number post from Grady from years ago that suggests this current engine may not be what she was born with? OR - since the engines for 1974 weren't really different between "regular" and Carrera cars in the USA - is that inconclusive? Know ultimately I need to order a COA but if I can determine is wrong for sure that seems tom be worth knowing.

I bought this to use and enjoy, so not super hung up about it.

Thanks!


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6 = Engine design, 6-cylinder engine
X = numbers 1-7 (see list below)
5 = Model year 1975
xxxx = Sequential serial number usually starting with 0001. Exceptions: Starting with 9001 = engine for Sportomatic.

X = 1, 911, Type 911/41, (or Type 911/46 for Sportomatic)
X = 3, 911S, Type 911/42, (or Type 911/47 for Sportomatic)
X = 4, 911S/Carrera USA, Type 911/43, (or Type 911/48 for Sportomatic)
X = 5, 911S/Carrera California, Type 911/44, (or Type 911/49 for Sportomatic)
X = 6, Carrera 2.7 (MFI), Type 911/83
X = 7, Turbo 3.0, Type 930/50

More important would be the internal spec number. IE 911/8x on the flat to right of fan.
Bruce

Should start 644 for 1974 US Carrera.

Thanks Bruce, will check that.

Matt - that is what my decoding suggested as well. It is interesting that even though I belive the engines were mechanically identical they gave the US Carrera a different engine number. Any ideas why?

Appreciate the responses.

HUH?
for 1974 the 911S and Carrera had the same engines in North America:
911/93 from 6340001 Manual
911/98 from 6349001 Sportomatic

My understanding is that the Carrera's used for the same engines but the information from Grady indicates that the Carrera models got a different engine code, not sure why since they were the same.

Good morning, what I found over my morning coffee is interesting. Did some digging this morning via auctions and what I found seems to suggest that there were at least some real 1974, COA confirmed, that had 634xxxx engine numbers. Actually every single 1974 I found on BAT with a matching COA was a 634xxxx.

1974 Carrera; 6340385 (COA confirmed)
https://bringatrailer.com/listing/1974-porsche-911-carrera-coupe-6/

1974 Carrera; 6340456 (COA confirmed)
https://bringatrailer.com/listing/1974-porsche-911-carrera-coupe-4/

1974 Carrera;6341389 (COA confirmed)
https://bringatrailer.com/listing/1974-porsche-carrera-18/

1974 Carrera; 6341584 (COA confirmed)
https://bringatrailer.com/listing/1974-porsche-carrera-10/

1974 Carrera; 6340195 (COA confirmed)
https://bringatrailer.com/listing/1974-porsche-911-carrera-targa-3/

1974 Carrera;6340733 (COA confirmed)
https://bringatrailer.com/listing/1974-porsche-carrera-8/

1974 Carrera; 6340508 (COA confirmed)
https://bringatrailer.com/listing/1974-porsche-carrera-3/

1974 Carrera; 6342740 (COA confirmed)
https://bringatrailer.com/listing/1974-porsche-carrera-2/

1974 Carrera; 6342377 (COA confirmed)
https://bringatrailer.com/listing/1974-porsche-911-carrera/

1974 Carrera; 6341747 (COA confirmed)
https://bringatrailer.com/listing/1974-porsche-911-12/

1975 cars seem to be 645xxxx

1975 Carrera, 6451700 (claimed matching)
https://bringatrailer.com/listing/1975-porsche-911-carrera-targa-2/

1975 Carrera, 6450163 ( COA matching)
https://bringatrailer.com/listing/1975-porsche-911-carrera-15/

1975 Carrera; 6450824 (COA matching)
https://bringatrailer.com/listing/1975-porsche-911-carrera-14/

1975 Carrera; 6451664 (COA matching)
https://www.pcarmarket.com/auction/1975-porsche-911-carrera-coupe-1/

My apologies for adding to your confusion. Dave is right, as usual. I took the decoder you used, and just used it. However, that's for 1975 only. It's not the same decoder for 1974.

1974 only had 2 US specs with digit 2 being a 1 for a 911 normal and a 3 for an S or Carrera.

Thanks for the follow up, and looks like I did (as I initially thought) buy a correct range engine number. Phew.

The North American Carrera in 1974 could not get the MFI engine of the Euro Carrera's and so had to settle for a plain 911S engine. The North America spec for engines changed to CIS on Jan 1, 1973

So it is a 911/42 then? You keeping us in suspense? SmileWavy

Ha, car isn't with me right now since it has a Euro 3.0 being put in. Grin.

Will pull that number and report back, really needed get a path for the engine coming out. If it wasn't number matching then I was going to be rebuilt and go into a 914.

Thanks for the response!