The "heart" of the 993TT engine..
07-14-2013, 02:07 AM
#17
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I thought this thread was about an oil pump. If it were me and someone did me wrong I would take it up on my own and not air it out on this forum. I am sorry if anyone did you wrong and karma will bring it back around to him/them. Please don't waste anymore space or type in theses blogs with this c$&p. Load up, hunt them down and be done with it! Cheers
07-19-2013, 12:19 AM
#21
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Yes there was fretting or wear...
There will be many more pictures.. they are documented the "unbuild" and rebuild with 100's of pictures..
Once the project is compete and they Give me the SD card.. I will post..
I went "interviewing" shops in the Chicago area..
Looked to see what was in the bays and storage lots.. Pick the one with only Porsche's
Also asked "how many 993tt engines have you rebuilt? One answer was "a few", did not use them. The one I chose had the answer.. "many, let me show you the one I am doing right now!" He was half complete of a full rebuild/ upgrade to race strength 993tt..
There will be many more pictures.. they are documented the "unbuild" and rebuild with 100's of pictures..
Once the project is compete and they Give me the SD card.. I will post..
I went "interviewing" shops in the Chicago area..
Looked to see what was in the bays and storage lots.. Pick the one with only Porsche's
Also asked "how many 993tt engines have you rebuilt? One answer was "a few", did not use them. The one I chose had the answer.. "many, let me show you the one I am doing right now!" He was half complete of a full rebuild/ upgrade to race strength 993tt..
07-19-2013, 10:25 AM
#22
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I went "interviewing" shops in the Chicago area..
Looked to see what was in the bays and storage lots.. Pick the one with only Porsche's
Also asked "how many 993tt engines have you rebuilt? One answer was "a few", did not use them. The one I chose had the answer.. "many, let me show you the one I am doing right now!" He was half complete of a full rebuild/ upgrade to race strength 993tt..
Looked to see what was in the bays and storage lots.. Pick the one with only Porsche's
Also asked "how many 993tt engines have you rebuilt? One answer was "a few", did not use them. The one I chose had the answer.. "many, let me show you the one I am doing right now!" He was half complete of a full rebuild/ upgrade to race strength 993tt..
Why the re-build? Were you having issues, or just making improvements, or making it more race ready? Thanks.
07-20-2013, 06:34 PM
#23
Rennlist Member
Anyone wanna shed some light into the inner workings of a 993 oil pump?
Just looking at the lub oil diagram in my workshop manuals, it is not clear.
The pump sucks oil from the pan, it is also connected to the sump, from where oil is led into the pump by gravitation? On the pressure side you have the main galley, which leads oil into the numerous passages for lubrication and cooling. But how is the thermostat connected to this? Surely there is not 5bar pressure in the line that goes to the thermostat (and to the cooler(s) from there, if necessary)??
Just looking at the lub oil diagram in my workshop manuals, it is not clear.
The pump sucks oil from the pan, it is also connected to the sump, from where oil is led into the pump by gravitation? On the pressure side you have the main galley, which leads oil into the numerous passages for lubrication and cooling. But how is the thermostat connected to this? Surely there is not 5bar pressure in the line that goes to the thermostat (and to the cooler(s) from there, if necessary)??
07-21-2013, 06:11 AM
#24
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All 911 engines run off the same design as the original 901 engine. A mechanically driven pump that runs off of the lay shaft which in turn runs off the crank. The pump design has remained relatively the same with the pump getting larger as capacities increased and of course racing applications. The 3.3L turbo oil pump was a huge upgrade after it's introduction, and the 964 derived pump that is run in the 993 series cars is a monster. You can imagine the volume of oil that pump moves at 6000 revs!! The joy of dry sump lubrication.
07-21-2013, 04:10 PM
#25
Rennlist Member
A couple of years ago I met up with a fellow rennlister and we had lunch with the owner of a racing shop that used to run 993 GT2s back in the day. He recounted a story where at the end of a long straight their car was down on power but by the time they got back to the pits everything was fine again. This went on with predictable regularity until one time they shut the car down at the end of the straight and towed it back. They found the crank case full of oil. An even larger oil pump solved the issue. I don't recall what the source was for the pump; perhaps the 962 or the like. The best part was that they didn't share their fix with the factory and it took them some time to come to the same resolution. He took considerable delight in that last aspect!
