Data dump on the 911: Engine serial numbers, etc. Can trade stories, questions and tips with fellow 911 owners. 911 and other Porsche Sales Literature. Dec 26, 2010 1974, 1975, 1976 and 1977 Porsche 911 2.7 Engine Serial Number Location. These are stamped numbers and no other motor has the same number. 1974 would start.
If you mean the engine type number, it defines the year and the characteristics of the engine. 901/XX, 911/XX, 930/XX, 935/XX and so on. The Type has a range of engine serial numbers. Your car VIN and engine type should 'match' hence the term 'matching numbers' unless someone changed engines.unfortunately not too uncommon with these cars.
The VIN is also in more than one place so if two cars have been cut in half and welded back togethere the VINs may not even match. To understand the numbers.use the lookup table.
Your 75S engine type number should be 911/4X where x is 1-9. Your 7=digit ’75 engine number should have the form: *6X5xxxx* where: 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 Best, Grady. First off - welcome. If that engine serial number is correct, it appears to be a non-California 1978 Turbo engine. A fairly rare beast.
Less than 300 produced. 253 HP @ 5430 rpm or 265 hp depending on source. 395 Nm Torque. 7.0:1 compression, 3.3 litre. (compared to 185 hp for a normal 911 3.0 SC, 8.5:1, Nm 265 Torque) I may get shot down for this - but the engine and gearbox may be worth almost as much as rest of the the car. VIN indicates a regular 1980 SC Coupe, 1 of ~4200 PS - that was a 10 year old thread!
Welcome, Mike. Unfortunately it looks like you ended up with a 3.0L engine from a 1978 911SC. I think most of us would view that as a significant downgrade from the 3.2L your car should have. I would say it's normally not common to swap blocks when a 3.2L is involved. You are more likely to find a swapped block in a 2.7L car because those engines had a lot of problems. And sometimes someone with a 911SC will upgrade to a 3.2L. Putting a 3.0L into a 1985 must have been done to save money (unless it's a real hot rod engine), and hopefully not to cheat you.
Does it have fuel injection or carbs? Fortemedia Fm801 Audio Controller Driver Xp.