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72 911 S engine ID

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Old 02-11-2014, 09:49 PM
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Baxter2012
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Default 72 911 S engine ID

I have a 72 911s with questionable engine number.
Behind the engine number on the case is 911/55 can anyone tell me what that means?
Old 02-12-2014, 12:47 AM
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pu911rsr
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911/53 is the correct engine type # for a 5 speed S. Don't see any listing for a 911/55 engine, double check that #, post serial # as well.
Phil
Old 02-12-2014, 09:06 AM
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Bill Verburg
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Originally Posted by Baxter2012
I have a 72 911s with questionable engine number.
Behind the engine number on the case is 911/55 can anyone tell me what that means?
As Phil says 911/53 w/ serial# 632 xxxx is correct for a '72S
911/51 w/ serial # 612 xxxx is correct for a '72TE (US/Cdn)
911/52 w/ serial # 622 xxxx is correct for a '72E
911/57 w/ serial # 652 xxxx is correct for a '72TV (US/Cdn)
Old 02-12-2014, 10:50 AM
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Baxter2012
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Default 72 911 S engine ID

Okay so here is my concern, first it is 911/53 and the engine number is 6320027 but it has clearly been re stamped. Old number removed and 6320027 put back in its place, numbers are to uniform and there is no star at either end.
That being the case does the 911/53 insure that the internals are S and that it is a 2.4l. I became concerned when I learned that the 72 T 2.4 that came to the states also had MFI. It has a red shroud but that really means nothing. I bought it as a case replacement but Ineed to know it is an S.
I just need to know if I need to take it to the shop and spend the $400 to have them pull the covers and check the cams.
Also my 71 T has 911/07 is that correct for a 2.2.
I have to stop being so trusting, I know but my experience with most Porsche people as not included BS
Old 02-12-2014, 11:22 AM
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race911
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Originally Posted by Baxter2012
I just need to know if I need to take it to the shop and spend the $400 to have them pull the covers and check the cams.
Would love to run THAT shop. What's this, 15 minutes worth of work? Pop an intake valve cover, mount the measuring tool, roll the crank 720............
Old 02-12-2014, 01:24 PM
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Baxter2012
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Know a good shop In Atlanta
Old 02-12-2014, 02:11 PM
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JCP911S
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My book, (Brett Johnson), shows that these numbers are correct for a '72S.

That said, these cars have moved through many hands. Even if the case is authentic, nobody can tell what is inside unless you tear it down.

Today, the value of these early 911S are so high that faking these engines can earn a guy $10-20K. Putting false stampings on an engine case is not expensive compared with this profit margin.

I'd rely more on a documented history of continuous ownership, not some stamping on an engine case.
Old 02-12-2014, 04:01 PM
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race911
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Originally Posted by Baxter2012
Know a good shop In Atlanta
No. But alternatively you can fork over ~$40 for the cam tool holder and probably about $9.99 for a Harbor Freight dial gauge and do it in your own garage.
Old 02-12-2014, 04:11 PM
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Baxter2012
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So I guess the 911/53 does not represent anything worth while, correct.
Body, vin plates and trans all match up just the engine in question
Old 02-12-2014, 05:27 PM
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rusnak
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I think the fact that the engine number has been changed, as you say, tells it all.
Old 02-12-2014, 06:16 PM
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Bill Verburg
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Originally Posted by Baxter2012
Okay so here is my concern, first it is 911/53 and the engine number is 6320027 but it has clearly been re stamped. Old number removed and 6320027 put back in its place, numbers are to uniform and there is no star at either end.
That being the case does the 911/53 insure that the internals are S and that it is a 2.4l. I became concerned when I learned that the 72 T 2.4 that came to the states also had MFI. It has a red shroud but that really means nothing. I bought it as a case replacement but Ineed to know it is an S.
I just need to know if I need to take it to the shop and spend the $400 to have them pull the covers and check the cams.
Also my 71 T has 911/07 is that correct for a 2.2.
I have to stop being so trusting, I know but my experience with most Porsche people as not included BS
External indicators of an S
red shroud
injection stacks
injection pump
throttle bodies
distributor rotor
If you can get parts #s off any of the above

fairly easily done is to check the lift of the cam w/ a dial indicator either total lift or lift at overlap
Old 02-12-2014, 06:58 PM
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Baxter2012
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I agree about the changing numbers. I will just get it in the shop and have them check the cams and hopefully they are what they need to be. Everything point to an S, checking the internals will verify.
Old 02-12-2014, 08:21 PM
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pu911rsr
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Well you know you have the correct type of case, if you are familar with the power band of an S motor you can tell a lot just by driving. As Bill says you can verify all the external parts are correct, you can check lift of cam. Folks have been faking RS motor serial numbers for years, we should all expect that same approach to be taken with all 911's now that the values have increased to the point where it's worth it to create the illusion of a numbers matching car.
Phil
Old 02-12-2014, 08:23 PM
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[QUOTE=Baxter2012;11129254]I agree about the changing numbers. I will just get it in the shop and have them check the cams and hopefully they are what they need to be. Everything point to an S, checking the internals will verify.[/QUOTE

Anybody can replace cams in these engines, that tells you nothing.

Bottom line, are you looking for a good Porsche, or looking to make money?

Sorry to be Debbie Downer here, but just be careful... everything you have said sets off red lights that this is a fake.
Old 02-13-2014, 10:36 PM
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Baxter2012
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Just looking for a good car, everything else looks right, calipers, gauges, trim, vin plate and they really did not try to hide the case change per say. The guy I got this from is top executive for a Fortune 500 company and big Porsche guy, seem to be stupid on his reputation.
I know the case has been changed but if you measure the cams and check the tops of the pistons and they are s specs you have An s engine correct?
Driving shows power band 4500 to 6000
A non matching number S is still valuable and a great car and goes along with my 97 c2s, a little bit of the first and last of the air cooled. S's



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