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914World.com _ 914World Garage _ GT oil system

Posted by: michel richard Dec 27 2005, 11:45 AM

As part of my GT look alike project, I spent quite a bit of time on the oil system. Here's the link to the overall project thread:
http://www.914world.com/bbs2/index.php?act=ST&f=2&t=34896
There's several good threads on the site about coolers. I started one, soliciting opinions about a possible oil cooler to use. I must say I had not done a search before starting that thread. If I had, I would have found a lot of the information I was looking for. see:
http://www.914world.com/bbs2/index.php?act=ST&f=2&t=40719&st=0&#entry529632
I've decided to move away from the solution I was exploring there, which involved Porsche 928 transmission oil coolers and instead to use an Rx7 cooler that I will modify and then have ultrasound cleaned. Actually, all the parts below will need a super-thorough cleaning before the engine starts, to avoid contamination. There's a place in town that does ultrasound cleaning, and that appears to be the best route.

I have also started a thread on the hard oil lines, and tub modifications to make room for those. See:
http://www.914world.com/bbs2/index.php?act=ST&f=2&t=40719&st=0&#entry529632
I have'nt sourced the hard oil lines yet.

In any event, I've done a lot of work on assembling a GT style oil system for my car. Here's an overall view of the part of the system in the engine compartment:

Posted by: michel richard Dec 27 2005, 11:47 AM

1st picture did not upload. Here it is:

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Posted by: michel richard Dec 27 2005, 11:47 AM

Detail of the console area:
The threaded hole on the console that faces towards the middle of the engine compartment, just above where the oil filter goes, is not used and will be plugged.

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Posted by: michel richard Dec 27 2005, 11:49 AM

The spacer can barely be made out in the preceeding picture, between the black console and the oil tank.

Here's a closer view of the console. Spacer cannot be seen here, hosever:

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Posted by: michel richard Dec 27 2005, 11:50 AM

On the underside of the car, the oil lines that will attach to the hard oil lines, and the one (furthest) wich is the oil return line, from the engine:

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Posted by: michel richard Dec 27 2005, 11:51 AM

I had to drill a couple of 1 and 3/8 inch holes in the driver side shelf to let oil lines through. (the hole furthest away is on all cars):

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Posted by: michel richard Dec 27 2005, 11:53 AM

Finally, I fabricated the pop-off valve that attaches to the oil fill neck. Here's a few pictures.

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Posted by: michel richard Dec 27 2005, 11:53 AM

again:

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Posted by: michel richard Dec 27 2005, 11:56 AM

Finally: I have yet to test the pressure at which it opens, it should be around 80 psi. If I'm off a little, I can adjust it. I used the fittings from a junk engine case that still had them.

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Posted by: Eric_Shea Dec 27 2005, 05:22 PM

Is that a 72 911S console?

Posted by: michel richard Dec 27 2005, 08:08 PM

QUOTE (Eric_Shea @ Dec 27 2005, 03:22 PM)
Is that a 72 911S console?

It's a '69 S console. I think that the '72 part is completely different, that was the year the 911 had the tank in front of the right rear wheel. The part I have is actually magnesium, very, very light.

Posted by: thesey914 Dec 28 2005, 04:06 AM

I can't quite see the route oil takes...does it pass through filter and then through thermostat?
Why is the oil return line connected to filler?

Posted by: michel richard Feb 18 2006, 02:22 PM

I ran a test to see at which pressure the pop-off valve would open, and it was too high (above 100 psi). So I figured out a way to make the valve adjustable. A longer lollow end screw, and a jam nut:

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Posted by: michel richard Feb 18 2006, 02:22 PM

and assembled:

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