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steved0x · 11-23-2015, 02:25 PM

I can add a data point - in October I was at Roebling and my oil pressure was dropping in the sweepers. I added the LN Engineering 2 QT Deep Sump with X-51 baffle, and this past weekend at Road Atlanta my oil pressure did not drop. There are some possible "catches" however:

Catch 1 - I did not data log or have a camera - the oil pressure drops were "recorded" by the instructors riding with me watching the gauge at my request, and by me (foolishly) quickly peeking down during a steady state portion of a sweeper.

Catch 2 - RRR is my home track. While I am not in the fastest drivers there, it is the fastest for me and the car is cornering harder there for me.

Catch 3 - I have only ever been to Road Atlanta once before and that was 18 months ago. While RRR is pretty flat (as are all the other tracks I have gone to) and it is wide open with lots of runoff room, Road Atlanta has lots of elevation, and also lots of walls. 2 cars were heavily damaged when I was there last June, and this past weekend 2 more were heavily damaged (1 still drivable) and 2 others damaged but drivable due to a tailgating type collision. I bought the track insurance, and took it easy. And the corners are different. For me turn 1, 4, and 6 were the ones that I had my passenger watch the oil gauge on, and they reported no drops - the needle stayed steady at around 60'ish. Turn 4, a left hand sweeper before the esses is probably the one most like some of the turns at RRR.

The real test will be next time I go to RRR so it can be an apples to apples comparison, and maybe I can have a go pro setup to record the oil pressure gauge.

But I feel pretty confident that the issue is greatly mitigated. Also one difference was that the oil temp barely ever went above 200 F, where at RRR on my fastest laps it got over 200 but less than 220, maybe 215'ish? That may be due to the extra 2 quarts of oil I was running or that is was cold as $%^& this past weekend, water temp only ever briefly moved above the 180 hash mark.

I got a good deal on the LN Skid Plate so I put that on too. Probably not necessary since my car is not lowered. Charles N of LN engineering has an early Boxster with a 911 engine (so the engine is 1 inch lower) and he is lowered suspension too I believe. He said he ran without the plate for a while and was fine, but recently he went to pass a car on the highway and ran over some roadkill that lifted the whole back of the car up, and he said he was glad of the skid plate then. The front part mounts on the two lower bolts that hold the engine mount to the engine. The back part mounts on the two forward bolts of the diamond sheet metal brace. In my opinion this ties the engine to the rear frame and makes some interesting sounds. I kind of isolated it in the back with some rubber and fiber washers and I am trying to think up a solution to put some bushings or something back there, I can definitely tell the plate is on and while you don't hear or feel it at the track, at street speeds/noise there is some kind of unpleasant noises/rattling going on. Maybe the skis plate is rattling my rear trailing arms which are probably shot...

It took 11 quarts to fill it up the middle segment between the high and low mark on the dash gauge which is where I like to run it to avoid smoke bombs.

I am looking forward to reading more about Tom's install and experiences. I will say I love Reinzosil, it is 10,000,000,000 times easier than Loctite 5800 (or 5900 or whichever the one it is) to apply.

Steve

PS My oil temp sender is in the unused port on the driver side cover (where DOF oil feed would go), Chris Zang has a guide on here somewhere, and for oil pressure I replaced the oil pressure switch with a VDO oil pressure sender with warning terminal, not the Porsche part but the regular VDO part. I used part number VDO 360009 with an adapter (I should have gotten 360028 which had the right size with no adapter needed), and VDO 323055 oil temp sender.

11-23-2015, 02:25 PM	#381
steved0x Registered User Join Date: Dec 2012 Location: FL Posts: 4,144	I can add a data point - in October I was at Roebling and my oil pressure was dropping in the sweepers. I added the LN Engineering 2 QT Deep Sump with X-51 baffle, and this past weekend at Road Atlanta my oil pressure did not drop. There are some possible "catches" however: Catch 1 - I did not data log or have a camera - the oil pressure drops were "recorded" by the instructors riding with me watching the gauge at my request, and by me (foolishly) quickly peeking down during a steady state portion of a sweeper. Catch 2 - RRR is my home track. While I am not in the fastest drivers there, it is the fastest for me and the car is cornering harder there for me. Catch 3 - I have only ever been to Road Atlanta once before and that was 18 months ago. While RRR is pretty flat (as are all the other tracks I have gone to) and it is wide open with lots of runoff room, Road Atlanta has lots of elevation, and also lots of walls. 2 cars were heavily damaged when I was there last June, and this past weekend 2 more were heavily damaged (1 still drivable) and 2 others damaged but drivable due to a tailgating type collision. I bought the track insurance, and took it easy. And the corners are different. For me turn 1, 4, and 6 were the ones that I had my passenger watch the oil gauge on, and they reported no drops - the needle stayed steady at around 60'ish. Turn 4, a left hand sweeper before the esses is probably the one most like some of the turns at RRR. The real test will be next time I go to RRR so it can be an apples to apples comparison, and maybe I can have a go pro setup to record the oil pressure gauge. But I feel pretty confident that the issue is greatly mitigated. Also one difference was that the oil temp barely ever went above 200 F, where at RRR on my fastest laps it got over 200 but less than 220, maybe 215'ish? That may be due to the extra 2 quarts of oil I was running or that is was cold as $%^& this past weekend, water temp only ever briefly moved above the 180 hash mark. I got a good deal on the LN Skid Plate so I put that on too. Probably not necessary since my car is not lowered. Charles N of LN engineering has an early Boxster with a 911 engine (so the engine is 1 inch lower) and he is lowered suspension too I believe. He said he ran without the plate for a while and was fine, but recently he went to pass a car on the highway and ran over some roadkill that lifted the whole back of the car up, and he said he was glad of the skid plate then. The front part mounts on the two lower bolts that hold the engine mount to the engine. The back part mounts on the two forward bolts of the diamond sheet metal brace. In my opinion this ties the engine to the rear frame and makes some interesting sounds. I kind of isolated it in the back with some rubber and fiber washers and I am trying to think up a solution to put some bushings or something back there, I can definitely tell the plate is on and while you don't hear or feel it at the track, at street speeds/noise there is some kind of unpleasant noises/rattling going on. Maybe the skis plate is rattling my rear trailing arms which are probably shot... It took 11 quarts to fill it up the middle segment between the high and low mark on the dash gauge which is where I like to run it to avoid smoke bombs. I am looking forward to reading more about Tom's install and experiences. I will say I love Reinzosil, it is 10,000,000,000 times easier than Loctite 5800 (or 5900 or whichever the one it is) to apply. Steve PS My oil temp sender is in the unused port on the driver side cover (where DOF oil feed would go), Chris Zang has a guide on here somewhere, and for oil pressure I replaced the oil pressure switch with a VDO oil pressure sender with warning terminal, not the Porsche part but the regular VDO part. I used part number VDO 360009 with an adapter (I should have gotten 360028 which had the right size with no adapter needed), and VDO 323055 oil temp sender.