rs rsr engine number HELP!!

[gee04c]

Hi all

Need help decoding this engine number. 66505**

last two digits not listed for security reason.

is this engine a rsr 911/75

what is it worth???

CHEERS

[fryardds]

This is a '75 Carrera 2.7 motor which is the same motor used in the '73 Carrera RS. It is type 911/83 which should be stamped on the case just to the right and below the serial # stamping.

These are valuble motors but the value depends on the condition, records, and the presence of all the important correct MFI components. Can you give a more detailed description of what you have?

[real550A]

Might also be worth a lot more to whoever has the car it belongs in, if still
around. There weren't a lot made with that engine in '75.

[gee04c]

i have a complete engine with all mfi in place, but engine has been sitting in shed for last 8 years so in need of complete rebuild.

What is it worth as a rebuilder. No porsche it was scraped many years ago.

How many were built??

[fryardds]

How many 911/83 motors altogether made?

'73-1580

'74-1469

'75-715

'76-123 (maybe 30 more from Targas this year)

Value on a core '74 or '75 911/83 engine is a bit hard to pin down, especially in this market. I would hope it would be at least $8-9K or more but you may not get any interest at all at that level, hard to say.

[John Schaefer]

Brian's pretty much spot on regarding today's market price. Do look at the date codes on the MFI pump and heads. I have a early '75 911/83 motor and all the date coded components are from the 6th and 7th month in '73, which seem to have more value.

[Brian38662]

I'm actually curious as to what these motors would be valued at too...I have a 1976 911 Targa that has a case number (6640261), unfortunately, the original MFI components must have been removed since it currently has a CIS. I can't smog the damn thing in CA since it doesn't have the ability to have smog equipment installed and CA stopped the 30-year roll over for smog.

[techweenie]

Core value on a 911/83 engine should start at $8-9K, simply because of what the components are selling for. If the engine was stored in a temperature-controlled environment and set up for storage - with oil in the cylinders, and occasionally turned over, I'd say +$1-2K. I was offered $20K+ for an RS clone engine built on an unstamped 7R case, so I presume a genuine, documented rebuilt 911/83 could be in the mid-$20K range.