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Jerry Woods makes a billet sump plate that I run on a few of my 935's.

Unfortunately you cant see the sump plate but you cans see I have hard lines from my turbo going to a section of flex hose to the sump plate



Can see a little of it in this shot


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Old 11-02-2014, 10:20 PM
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Porn.
Old 11-02-2014, 10:55 PM
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Pure car p*rn!
Old 11-03-2014, 12:29 AM
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Here is a link to contact info if you are interested in the sump plate

JWE Motorsports | Professional Porsche Race Car Coaching Upgrades Trackside Support Setup and Maintenance






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Old 11-03-2014, 03:02 AM
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Here's a shot of the Jerry Woods sump plate. He made one for my engine when it was rebuilt in '09. I contacted them a few months back about one, but they no longer make them. I plan on making one for the turbo motor in progress.
Van, I remember seeing your 935 at Wevo. We had a shop close by and I use to visit his shop frequently checking out the new toys.
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Old 11-03-2014, 05:06 AM
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Hello Harold

I remember all too well the thrash with Hayden and the guys at WEVO.. I had sworn that after a worse thrash session to get a car ready for an endurance I co drove with TRG's Kevin Buckler that I would never do that again.. I was too old.
At WEVO we started with this and boxes of parts...





And just like the movie , 9 1/2 weeks later we ended up with what you see above. Finished the car at 7 AM , loaded it on a trailer and I made it in time for the second practice session at the Monterey Historics IMSA/GT Group.


Next time you do an oil change you should get that piece duped or ask Jerry for the drawings which I have personally seen on his computer in the dyno room. That is a nice piece. Your engine looks sweet and dry as my great, great grand daddy's scalp.
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Old 11-03-2014, 05:53 AM
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+1 on the porn

Same JW doesn't make them anymore, would of been nice to have an off the shelf solution.
Thanks for the pics and info though
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Old 11-04-2014, 11:44 AM
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I will machine a sump plate similar to the JW one once I start the rebuild. I'll post some photos and if there is any interest I'll talk to a local cnc guy about about making a small run.
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Old 11-04-2014, 12:38 PM
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That's great
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Old 11-04-2014, 01:03 PM
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Stepping back from this for a minute: why do you want to use a gravity return instead of the old tried-and-true cam-driven scavenge pump? That system works so well and doesn't risk getting whacked during unfortunate excursions off the track. I had a gravity return that looks just like yours -- with an AN-8 line to a welded bung on the sump plate -- on my 78 930 with the old 3LDZ and it didn't work well. Mosquitoes didn't like it either. I went back to the scavenge pump for primary function, and an overflow that went to my right side chain cover (a Bob Holcombe idea) for my Garrett turbo. It worked flawlessly. I agree that gravity is simple and free, but if there's a risk, remember that the original system works well.



Old 11-04-2014, 03:47 PM
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There seems to be a difference of opinions between mechanics on how well the stock scavenge pump system works. JW didn't think they worked that great, choose to ditch it and go with a gravity return at the time of the rebuild. The JW sump plate is approximately 1.250" deep at it's lowest point with the return line and drain plug on the side. In your photo you have stuff lower than that on 4 sides so I don't see the sump plate being an issue. Yet, I've seen some awfully weird offs at the track, so to each his own.
I'm going this route for it's simplicity, and I have a Carrera oil tank I'd either need to modify or swap out for a turbo tank to use the stock system.
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Old 11-04-2014, 04:52 PM
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The JWE sump plate was just an upgrade of the same set up I had on the car.. that car ran the Daytona 24 hour and the 12 Hours of Sebring a bunch of times...

However.. I do like the old VW oil pump conversion pumps. Powerhaus used to make those. I am sure someone else has to be. They were around 600 dollars.

And don't forget there is an oil pump on the other side of that sump plate

I actually gravity fed into the lower valve covers on this car






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Old 11-04-2014, 09:22 PM
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Electric Oil Feed and Scavenge Pumps
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Old 11-04-2014, 11:00 PM
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Turbowerx pump on my car

Base-Model Pump

Well up to the job for one turbo or even two (if I decide to upgrade )

Sump plate is now with the welder........maybe a week or two before its back as he's extra busy...
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Old 11-05-2014, 09:37 AM
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Quote:
Originally Posted by gumba View Post
There seems to be a difference of opinions between mechanics on how well the stock scavenge pump system works. JW didn't think they worked that great, choose to ditch it and go with a gravity return at the time of the rebuild. The JW sump plate is approximately 1.250" deep at it's lowest point with the return line and drain plug on the side. In your photo you have stuff lower than that on 4 sides so I don't see the sump plate being an issue. Yet, I've seen some awfully weird offs at the track, so to each his own.
I'm going this route for it's simplicity, and I have a Carrera oil tank I'd either need to modify or swap out for a turbo tank to use the stock system.
I'm not the all-knowing expert in this, but I've never seen a properly maintained stock 930 scavenge system fail to operate correctly. And I've heard of all kinds of problems -- and have experienced them first hand -- with gravity return systems that didn't work right. It's my understanding and experience that a stock turbo in a stock location may *not* drain properly to the sump by gravity only -- there's not enough fall. So the reason for my post was only to ask why it's necessary to "fix what ain't broke." Granted, gravity is "simpler" and if you have a such a system that is engineered properly and proven to work under all conditions, then that's great. But getting there has its drawbacks too -- a specially machined sump will cost a bundle - and it will hang down and increase vulnerability to undercarriage hits. And will it work without raising the turbocharger? Doing so is a big deal.

Gumba, you pointed out that other things like exhaust may hang low and get damaged as well, which is true. But the worst possible situation is to scape off your oil sump and immediately drop all the oil. If you have other extenuating circumstances, such as missing some of the stock infrastructure (pump, cam drive, lines, and spigoted 930 oil tank), then the balance may shift to exploring other options. You may fall into this category. But for those who have the hardware and infrastructure available, why would anyone want to do it?

My understanding from discussions with Bob Holcombe long ago is that for Garrett (or other non KKK turbos that flow a greater volume of oil through the bearing), the stock scavenge pump *may* have issues keeping up. But the potential for such a problem only exists at idle. That's why for a Garrett setup, he suggested an overflow and vent line from the top of the drip canister to the right side chain cover. I never confirmed that any oil ever flowed down that line, but it was an easy and inexpensive addition to provide a margin of safety. And I never experienced any scavenge issues under any street or track conditions.
Old 11-05-2014, 09:48 AM
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I gravity fed to the chain cover, but I'd use the term, forced fed. There was virtually no gravity at that point.

I'm not fond of my somewhat, just maybe, not that great of a gravity feed to the oil drain plug I have now.

I agree, oil drains on these cars are not fun.
Old 11-05-2014, 09:58 AM
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Rob,
The JW set up has 12,000 street miles with no issues. I don't track the car, so not worried about sump plate damage. I'll machine the sump plate so the cost is less than $100 for the material & fittings. In my case this seems like the appropriate approach, can't speak about the pros/cons for anyone else.
Thanks for the input, the more info the better.
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Old 11-05-2014, 11:02 AM
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Rob, I think Gavin has a non-930 based system. Mine is an SC also. As such, there is no oil pump drive on the camshaft.
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Old 11-05-2014, 11:41 AM
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Pat,

Yes, I'm now realizing that maybe that's what's going on for some of you -- you're not starting with 930 hardware. Certainly, that tips the scale toward novel solutions. I don't mean to be overly negative about the prospects of a non-stock oil return system; they can clearly be made to work. Everything is a compromise; it's all about finding a path that makes the most sense for your situation. I'm glad to know, Harold, that your system has worked well for you for a long time. That will be a data point for me as well.

Rob

Old 11-05-2014, 12:12 PM
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