Type 901/xx Engine Build #'s

[Mr9146]

Those casting dates are very strange. Partly because of the difference in dates, but also because they are far earlier than might be expected. About 800 engines later than I might have expected. Could you document this engine with photos of all the numbers and so on please.

I will snap some pictures later today, but you clarify your above post? It looks like you're saying they are earlier than expected but then in the next breath you say 800 later than expected. I'm confused.

[davep]

Sorry about the confusion. The engine serial # is about 800 higher than the casting dates would suggest; this build 3256 but would expect 2148 to 2486 for 65/06 and earlier for 65/03. I really need a lot more casting dates to understand them better. I see what is sometimes a reverse trend in pairing #'s and casting dates sometimes. When the halves are cast I suspect there will be batches, not a continuous succession of dates. Then a case pair is machined as a set and the casting dates tend to get jumbled. Finally, a case gets assembled and the casting dates are further jumbled. Especially if there is any last-in first-out activity which I would expect to be the norm at least in bin quantities.

[Mr9146]

Sorry about the confusion. The engine serial # is about 800 higher than the casting dates would suggest; this build 3256 but would expect 2148 to 2486 for 65/06 and earlier for 65/03. I really need a lot more casting dates to understand them better. I see what is sometimes a reverse trend in pairing #'s and casting dates sometimes. When the halves are cast I suspect there will be batches, not a continuous succession of dates. Then a case pair is machined as a set and the casting dates tend to get jumbled. Finally, a case gets assembled and the casting dates are further jumbled. Especially if there is any last-in first-out activity which I would expect to be the norm at least in bin quantities.

I think you're right. It seems logical Porsche would cast the case halves in batches and then just pull a left and right and then machine them as a pair and stamp them with the requisite numbers...

[Bill Simmeth]

As seen on eBay...
907631
901/05
4496

[davep]

Thanks Bill. Here is a very odd motor case:

http://www.ebay.com/itm/Porsche-911-...-/110991989988

type 901/03 build 10718 casting dates 7/67 should have had a serial near 2080338 but currently is numbered AT6110508
So did the factory rebuild an old 2.0 into a 2.2, shave the old serial off and stamp a new serial in?
Who did stamp engines with the AT? Was the factory the only place or did VW Canada remanufacturing do it?

[F1scal]

Hi Dave,
I have a February 1968 SWB with this numbers:
Engine number: 3280953. Type: 901/14. Serial: 13506. 130CV DIN (Year: 1968)
Gearbox: 3281260. Manual 5 Gears. (Year: 1968).
All this must be in a Porsche 911 2.0 or L (Porsche Data Basis), but VIN of my car is 11820569 (Porsche 911T 1968)
Official certificate I have says my VIN number is a T with engine number 2180100 110 CV DIN and gearbox 4180196 (Sportomatic).
?????
Do you need photos?
Cheers

[davep]

Thanks, I imagine that someone found it easier to replace the sporto combo with a manual combo. Keeping a sporto going can be a challenge that some mechanics will not accept.

[nammon]

Mine is 1969S
Vin #119301255
Engine #6391791
901/10
24598
Pair # Couldn't see it yet

[1968DT]

6392081 is a very late engine. Can you provide details in my build # thread please:

Sure ~

6392081

901/10

26161

on top of the block are 74 & 74, are these the pair #'s?

It's an "S" motor (longblock) rebuilt by SuperTec.

Thoughts?

My other engine is 901/14 3280633 VIN#11835038...can't see the build #...not sure if al or mag

[davep]

Very good, thanks. 3280633 would be a mag case, the second of its engine type; I really need to know that build #, it will be close to 12100. It should be readily visible. Yes, the 74 is the pairing #, and they match. What is the paint code on the badge of the car please? That car is a very early Karmann bodied normal US coupe. I believe the engine would be original.