911 engine number question Options

[914ltd]

I purchased a 911 magnesium engine case that has an odd serial number seeming authentically stamped in the correct place. 3180259. The case is a 1R series casting number. Any way to check this number out? Thanks! Brad

[ejm]

According to the engine s/n listings in "The Porsche Family Tree" book the only year that had a seven digit number beginning with 3 was 1968 but the lowest number was 3280001. Any chance you are miss reading the number?

[Jeffs9146]

It is a 68 Targa!

911 Targa 901/06 130/6100 176/4200 11880001-11880268 3180001-3180347

Porsche 911 Identification

[914ltd]

Thanks Jeff and Ed, It doesn't fall in the numbers but that isn't unusual. I owned a couple 68's years ago but they were aluminum case engines?? I certainly didn't remember the mag case before 1969. Furthering your education includes relearning things forgotten. Brad

[Jeffs9146]

Thanks Jeff and Ed, It doesn't fall in the numbers but that isn't unusual. I owned a couple 68's years ago but they were aluminum case engines?? I certainly didn't remember the mag case before 1969. Furthering your education includes relearning things forgotten. Brad

It falls well withing the range of numbers for a 68 targa!

3180001-3180347

It is number 259 in the range of 347 built!

[ClayPerrine]

Probably a replacement engine that had a blank number plate. There were no mag cases in 68. The dealer installing it probably just put the original engine number on there.

[Jeffs9146]

Probably a replacement engine that had a blank number plate. There were no mag cases in 68. The dealer installing it probably just put the original engine number on there.

Maybe but I think there were 20 mag cased 911R motors built between 1967 and 1968 for "race only" cars!

The R designation meant a lightened car with thinner sheet metal and a racing engine with 210 bhp at 8000 rpm. This particular example is one of only 20 made and has an extensive period racing history.

The 110 PS (81 kW; 108 hp) 911T was also launched in 1967 and effectively replaced the 912. The staple 130 PS (96 kW; 128 hp) model was renamed the 911L. The 911R had a very limited production (20 in all), as this was a lightweight racing version with thin aluminium doors, a magnesium crankcase, twin-spark cylinder heads, and a power output of 210 PS (154 kW).

Porsche used the Type 901/22 engine from the Carrera 906 to power the 911R. Some of the cars were given mechanical Bosch fuel injection systems while others received Weber carburetors.

[914ltd]

Thanks Jeff and Ed, It doesn't fall in the numbers but that isn't unusual. I owned a couple 68's years ago but they were aluminum case engines?? I certainly didn't remember the mag case before 1969. Furthering your education includes relearning things forgotten. Brad

It falls well withing the range of numbers for a 68 targa!

3180001-3180347

It is number 259 in the range of 347 built!

Forgot how to count as well. Brad

[brant]

Probably a replacement engine that had a blank number plate. There were no mag cases in 68. The dealer installing it probably just put the original engine number on there.

I've seen a few aluminum cases in 1968, and a few magnesium cases in 1968
it was a transition year... probably the mag motors were later in the year

my race car has a 1972 7R case that was MFI
the 7R cases were all supposed to be 1973.5 CIS cars
but I think when the motor cases switched production they went into the assembly line no matter the model year... same thing as the aluminum to magnesium motors.