911 Engine block Nr. 611 0455 reference needed

[HKZ Bob]

Dear Folks
does the 911 team knows what behind this block no.
Nr. 611 0455

- Nr. 901 101 101 3R
- Nr. 901 101 102 3R




Regards HKZ Bob

[304065]

Bob,

6= 6 Cylinder 911
1= 911T
1=1971
0455= sequential number.

The "3R" is a casting number, one left half and one right half.

Basically this is a magnesium case from a 2,2T.

Any other questions? What is the "Typ" number?

[HKZ Bob]

Thank You John,
can I use this housing to build a 2.4 T.

Regards Bob

[HKZ Bob]

The Spigot diameter ist 91,6mm

[304065]

Bob,

"Cylinder outer base diameter to crankcase"

2.0
92.072-92.159mm (checks with spec book p. 27)

2.2 same as 2.0 (checks to spec book p. 39)

2.4 same as 2.0.

It's only when the 2.7 cylinders appeared that the diameter went to 97.072-97.152mm, or a 5mm change, basically.

So it is possible to build a 2,4 on a 2,2 case, I believe the distributor bore is larger on the 2,4 case, which would require the use of a 2,2 distributor.