Again, Deep sump

[Robert986]

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?

[maytag]

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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[NewArt]

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!

[BYprodriver]

Originally Posted by Robert986

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 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

[Robert986]

Originally Posted by BYprodriver

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.

[Quadcammer]

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.

[BYprodriver]

Originally Posted by Robert986

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.

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

[Racer Boy]

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?

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

[BYprodriver]

Originally Posted by Racer Boy

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?

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.

[Racer Boy]

As do I, BYprodriver!

[blue62]

Originally Posted by BYprodriver

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

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

[NewArt]

Originally Posted by Quadcammer

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.

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.

[maytag]

Originally Posted by Racer Boy

As do I, BYprodriver!

What oil are YOU using?

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[Racer Boy]

Originally Posted by maytag

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.

[maytag]

Originally Posted by Racer Boy

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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[Robert986]

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..

[Quadcammer]

Originally Posted by NewArt

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.

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

[Racer Boy]

Originally Posted by maytag

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

[MaxD]

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.

[jaykay]

Originally Posted by NewArt

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!

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