Engine serial number help / 3.1?

[jimtweet]

Just purchased a 79 ROW, highly optioned and came across a odd serial number and some weird parts I was not familiar with

Can anyone shed some light

[SkiVT]

Is it this??

https://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/1030224-remanufactured-911sc-3-1l-pistons-cylinders.html

[jimtweet]

Originally Posted by SkiVT

Is it this??

https://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/1030224-remanufactured-911sc-3-1l-pistons-cylinders.html

No, I believe this is some sort of special model, SC-L or something, this is a two owner car with no known motor swaps in its history

[SkiVT]

I was thinking the factory option 3.1, not the conversion kit also discussed in the thread.

[Matt Monson]

You would really need the options list from the car to be sure. Hard to say just from the engine. It could be original or it could be a conversion.

[SkiVT]

There is a reference to the 3.1 engine number stamp in this article quoting Jim Williams

https://www.excellence-mag.com/issues/180/articles/point-one

[al lkosmal]

It is not likely that the conversion, that was reportedly.....a dealer "secret" option, would be listed in the original options list. Based on the little research i've done....the cases were stamped with the 3.1...and the Turbo cylinders were used,,,these would be the external,visual clues that you have a 3.1...as mentioned in the Excellence article........

[QueWhy]

It’s got the same *3.1* stamp shown on other 3.1L engines. Nice find!

[jimtweet]

Originally Posted by al lkosmal

It is not likely that the conversion, that was reportedly.....a dealer "secret" option, would be listed in the original options list. Based on the little research i've done....the cases were stamped with the 3.1...and the Turbo cylinders were used,,,these would be the external,visual clues that you have a 3.1...as mentioned in the Excellence article........

what am I looking for on the turbo cylinders? any clues?

[QueWhy]

Post a pic of the fuel distributor, it should have a Bosch part number and be different from other ROW 911’s too.

[al lkosmal]

The turbo cylinders, reportedly used for the 3.0-3.1 were only partially finned vs. the fully finned 3.0 cylinders.

here's a pic of the turbo cylinders (found on a Pelican thread)

[jimtweet]

Look like turbo cylinders to me

[al lkosmal]

Score!!! Looks like someone installed one of the aftermarket Stainless Steel airboxes too!


what is the hole we are looking through????

[jimtweet]

Originally Posted by al lkosmal

Score!!! Looks like someone installed one of the aftermarket Stainless Steel airboxes too!


what is the hole we are looking through????

Some busted up heater block off