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Lugnt :-)
The 2,7 block have to numbers M44/11 & M44/12 but since the block above is an /12 and doesn't have the ports maybe they started later in the series?
My block is an /11 and quite an early one and no ports..
Side question: One side of my block specially around the BS there is some surface oxidation. How do I remove this easily and without damaging the BS cover mating surfaces?
Did you confirm in person that that 2.7L block didn't have ports? If you are going solely on those photos, I would say they leave some room for doubt. It's like trying to take pictures of bigfoot, but note the area I marked on your photo, which lines up suspiciously closely to the ports in my 2.7 motors. Just seems odd to me that Porsche would design an all-new raise-floor, connected-cylinder block, and then change the casting so soon. Although I suppose stranger things have happened.
Peedster, in your second picture above, isn't that a small windage port? Looks like maybe the early ports were rectangular slots (like my current motor and yours) whereas the later blocks seem to have much larger rounded ports? Or do the early rectangular slots not pass through to the other side maybe?
Edit: I'd start with a citrus cleaner and nylon brush, and move up from there. Sctochbrite pads work great but leaves scratches (so careful on the making surfaces).
Tom: Definitely no ports. Strange how dark the pics got, sorry! But no holes just a small chamfer like the ports should be there but the "port guy" was home sick that day, therefore some blocks didn't get the holes drilled ;-)
If anyone with an M44/11 has the ports then it's really strange.
this means the S2 and 2,7 blocks really are not the same but is the ports the single one difference then?
ok thanks will try to find out what Citrus cleaning is in Suedia!
Did you confirm in person that that 2.7L block didn't have ports? If you are going solely on those photos, I would say they leave some room for doubt. It's like trying to take pictures of bigfoot, but note the area I marked on your photo, which lines up suspiciously closely to the ports in my 2.7 motors. Just seems odd to me that Porsche would design an all-new raise-floor, connected-cylinder block, and then change the casting so soon. Although I suppose stranger things have happened.
I was a bit disapointed to see that this block does not have the ports.
And yes, I confirm once again, that that 2.7 block does not have ports. No doubt about it. No Photoshop!
I could not take a better photo since the crank is still fitted. Below are some additional pics, taken by my cell phone.
Lugnt :-)
The 2,7 block have to numbers M44/11 & M44/12 but since the block above is an /12 and doesn't have the ports maybe they started later in the series?
My block is an /11 and quite an early one and no ports..
....
If anyone with an M44/11 has the ports then it's really strange.
this means the S2 and 2,7 blocks really are not the same but is the ports the single one difference then?
...
See post #16, it appears the different PET numbers 944 100 961 00 --> 2.7l vs.
944 100 962 00 --> 3.0l could suggest, that there is a difference.
Porsche did do some strange things along the way. Seems as if this might be another, err crankcase. (pun intended etc Sorry, couldn't resist). Amazing to see that you can still purchase these from the factory. Be interesting if you contacted them about this to see if they had an explanation? By comparison, does anyone know if other i4 motors have windage ports as standard? Good to see the weight of the crank confirmed too. 55lbs is very heavy!
.... By comparison, does anyone know if other i4 motors have windage ports as standard? ...
according to my 1232-page internal-combustion engine bible, pages 116/117, yes.
Mainly for pressure compensation between the chambers within the crankcase in order to reduce internal friction losses.
Sorry, in this case unfortunately I don't have english literature.
Huh! Now I'm wondering if my current motor has them. Sure looks like rectangular ports in my photo, but I don't have any views showing whether it goes all the way through, or if they're just decorative replicas of actual ports like yours. No question the one on the stand has the bigger oval ports, but that's an M44/12 motor.
My 2.7 engine had an auto box. A year or so ago I heard about the Porsche Classic blocks and asked a OPC to find the price of a new 968 block. They tried a couple of times and each time they were told unavailable. I heard the limited number had all been sold in Germany.
I think you are correct Peedster, the windage hole guy definetely was home sick which is why some blocks did not get them! I bet your block is one of them Tom
Regarding the new blocks from Porsche classic I have the same experience as Blade7. Unavailable!
I think you are correct Peedster, the windage hole guy definetely was home sick which is why some blocks did not get them! I bet your block is one of them Tom
Regarding the new blocks from Porsche classic I have the same experience as Blade7. Unavailable!
Regards
Peder
A million pictures of that motor, and I can't find a single one that shows whether those ports go through.
01-14-2017, 03:41 PM
