Again, Deep sump
 

So, this old topic :-)

986s 2003. I run the X51 baffle in the oem oil pan. R-compounds (Cup2).

Under hard acceleration in a long righthander I have at some moments seen the oilpressure lamp flicker. Clearly this is not ok so before next session I need to adress it.

I know about the lack of scavenge pumps on bank1 (front) and bank2 (rear) so I guess it´s in my case oil pooling in bank2 so the pickup sucks air. Since adding scavenge pumps is very expensive and a bit complicated maybe, I believe my options are:
1) Deep sump
2) Accusump

Since the deep sump is far easier to install than the accusump, this is what I´m leaning at.

So, am I goint in the right direction? I´m looking at the FVD deep sump, are those extra 0.6 litres really enough to make a difference? Any advices from you guys?

I went with the LN deep sump with the baffle/ plate that sandwiches between. It's the only one that made much sense to me. And it has worked very well.
Word of caution: test fit it first. The quality control at LN sucks BADLY. you'll be adjusting holes in both the baffle and the sump.

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I have the MantisSport 2 litre deep sump and never had any problems. I run the oil level around mid-range on the gauge to avoid smoke bombs with the assurance that there’s still lots of oil down below!

I have the FVD pan, It comes with a X-51 style metal baffle & doors. It's a quality part. I run DT-40 oil & don't have any issues

Did you have any issues before?

I feel that 0.6 liters is not very much, is it really enough. 2 liters Mantis looks like it give a bit too much reduction of ground clearance, I get the feeling I´d like somethng like 1 liter. But if 0,6 really works, then the FVD seems like a good choice.

for you guys saying these things work, how are you monitoring your oil pressure?

I have ln deep sump with x51 baffle and horizontal baffle. Pressures drops all over the place.

Very brief oil pressure drops on track, but I just drive to the track & run with my street tires.

I have a deep sump and X-51 steel baffle, and I don't monitor the oil pressure beyond the warning light, because that is all you need, right? :rolleyes:

This issue inherent with the M96 is one reason why I only use 200 treadwear tires (Hankook RS4).

I believe Oil quality is the top priority. I use DT-40.

As do I, BYprodriver!

Oil quality means nothing if it doesn't get where it needs to go;)

Although I pull some fairly strong g’s with sticky tires, I don’t notice any significant pressure drops. I have separate VDO gauges for oil temperature and oil pressure.

What oil are YOU using?

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DT-40, although I don't think the brand has anything to do with oil pressure drop from hard cornering. That's caused by a poor design in the oil circulation system.

No, but I DO think that a "better" lubricant is likely to mask more dips in pressure than a "lesser" lubricant. Y'know?

I dunno..... maybe that's naive.

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I´m certainly no Oil-expert, ut I do think that there might be a possibility to get less foaming with the right oil, thus better fill in the oil-pan. I run Mobil-1 5w-50, X51 baffles, OEM pan. Get some flickering pressure-lamp in hard cornering sometimes..

Reading all the great responses above, I think I might start by using the FVD 0,6l pan, if thats not enough, I guess the FVD-pan could easily be sold as used..

interesting, do you have any video that shows the gauges while cornering?

It can't hurt to have a good oil, that's for sure. But the root problem is still there.

For what it is worth I run XP9, have an LN deep sump and the oil pressure does vary widely. Pretty much the same as when I ran an X51 only.

Your gauge sampling rate will effect what dips you see. AIM will use 5-10hz for a pressure sensor, don't know about a VDO gauge.

If you do install a deep sump on a car that is run on the street, install some sort of sump guard. You won't regret it.

Being Canadian and very close to Msntis I have run the Mantis 1.5 for years and never had a flickering oil pressure light on street biased tires at Mosport and Shanonville.

Way back it seemed to be the only design with a windage tray trapping the sump volume so I went with it rather than risking the engine. Never saw the point of the x51 when oil could escape upward irrespective of the baffles being steel or otherwise

I don't think I ever had the wherewithal to catch oil pressure dipping in corners. I think gauge with a preset low level alarm would be what I would have done for track work

XP9 vs DT40.
Somebody? How does the nomenclature for Driven oils work?

XP9 = 10W-40
DT40 = 5W-40

DT is the street car formula and XP is race. I assume the difference is in the friction additives and the XP9 costs more.

The Spec box never sees below freezing starts but it does see service above 4000 rpms for 30 minutes often.

I assume the gauge itself only captures at 1 hz. Very possible that you may miss an outlier pressure event. If it samples at a higher rate it may be buffered to look smooth unless everything goes south.

This is why having data logging can be helpful. I only look at engine related values after the fact, unless an alarm LED goes on I keep charging.

Oil getting where it needs to go is the easy part, staying there is the goal.

Just a thought, those deep sump kits with a x51-plate, do the use the regular pkate or is it extended to seal against the engine? Basically can I reuse my x51-kit if I would make a deeper sump myself?

Search thstone's spec boxster thread, he had installed a Pedro 2 qt deep sump combined with the stock x-51 baffle from EBS, I can't recall if he had to do any trimming of the baffle, but he did have to do some trimming in the flat plate so the baffle could sit down in it (with the Pedro deep sump there is a flat plate that sits on top of the spacer) - if you are talking about the .5 liter BK spacer, EBS makes a different version of the X-51 baffle for those, presumably with some extra length on the bottom.

You might be able to bing some images of the two baffles and be able to see the differences?

Good thinking! I´ll investigste..

The one I´m thinking about specifically is the FVD that uses a "X51 Style Baffle"

So if I make my own sump, could I re-use my x51 baffle, I cannot really see why it would need to seal totally at the top. But what do I know..? ;-)