• Jun 27, 2008
Thanks to media outlets like YouTube and Autoblog, a good lap time in on the Nurburgring will get you plenty of positive press. The grueling track has become the yardstick by which any performance vehicle is measured, and if you can post a record time, people want to know about it. The engineering geniuses at Porsche have designed a special moving dyno to test g-loads in a virtual 'Ring. The system was used to test the upgraded dry sump oil system for the new 3.6- and 3.8-liter boxer engines powering the 2009 911 Carrera and Carrera S. The dry sump system now has a variable-flow pressure pump that needed to be tested extensively at the 'Ring, but the new system can perform the same task whenever engineers want, and at a fraction of the cost.

Engineers were able to get a near perfect reproduction of a lap on the 'Ring by recording the g-force and engine load during a live lap of the Nordschleife, and then feeding the data into the contorting contraption. Hit the jump to view video of the moving dyno in action. It's pretty radical, and it gives you a better idea of how crazy the 'Ring really is.

[Source: Inside Line]



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  • 32 Comments
      • 6 Years Ago
      Music to my ears.
      • 6 Years Ago
      i'm with LS7 on this.. this device doesn't look like it's putting the engine under the same stress it would receive from doing laps around acircuit..Rather, it simply tilts the engine in every direction to replicate the movement of oil in hard braking/acceleration situations or under lateral g-loads so as to test the oil pressure/pump etc virtually in the lab. kudos to porsche engineers to come up with a simple yet cost effective method to test engines.
      • 6 Years Ago
      One quick plug:
      KONI Challenge tomorrow at 2PM EDT on SPEED.

      It's a 2-3 hour endurance race with production derived cars. Tomorrow's race actually took place last weekend (so don't go to the Grand Am website, it'll have the results) at mid-Ohio. This is a street tuner (super touring) only race, so you'll see nothing with more motor than a BMW 325i. It's a good track so it should be a decent race, unless it rained. The track was seeing huge rain squalls (turned the Grand-Am Rolex race into a mess for a while), so there's some chance it's a washout.
      • 6 Years Ago
      Ls2ls7 might have a point IF we were talking about some big V8 with with a big pool of oil in the pan ( and the oil wasn't moving) .... But this is a dry sump engine. ( with a small and shallow sump). The problem with 911 engines has long been makeing sure that the savenger pump and pickup are not starved of oil. It adds air to the oil that doesn't get fully removed as the 12 quarts cirulates ... Not a good thing. As a result, the sump has a number of baffels in it. This is hardly a new problem. A standard autocross / DE upgrade for a 911 is a revised pan with a deeper sump and revised baffels. The test rig is a way to Simulate ( not replicate ) the forces imposed on the engine BEFORE testing is done on the track. It's much easier ( and alot less expensive) to test and make revisons on a dyno than at the track. Looks like good Porsche engineering to me.
      • 6 Years Ago
      LS2LS7, I'm sure if your german was good enough and you're there with the engineers. They'd be able to convince you otherwise. Your 'fail' theory will work if engine oil was half filled.

      There are many interpretations for experiments. Some choose to look for Loch-Ness monsters when they saw a photo of it, some chose to replicate a similar photo to not look for the Nessie. Both could be right or wrong.
        • 6 Years Ago
        I don't understand quite what you said there.

        If you want to slosh the oil around and see where it goes or how it oils, this can do it. But it can't replicate the forces the oil will see on the track, and it adds extra forces of its own.

        Is this good for something? Probably. Is it telling you the same info you'd find on the N-Ring? Nope.

        I don't need to learn a knew language to understand how physics works. This device cannot generate sustained >1G forces in any direction. PERIOD. Not in English, not in German. And since virtually all motions on a track include a total of more than 1G of acceleration (including the 1G of gravity), that means it can't accurately simulate much of what is happening on the track.
      • 6 Years Ago
      What was the engine's time? ;-)

      Pretty cool stuff.
        • 6 Years Ago
        I dunno, but it looks like it's definitely in the 7:20s. ;)
      • 6 Years Ago
      All this American thought they knew everything, super-smart. If you guys that good, big 3 won't be loosing to a Japanese comp.
      • 6 Years Ago
      i think i just... yep, wet myself
      • 6 Years Ago
      ls2ls7,

      you said "In fact, since all movements on a track have the 1G component of downward gravity plus an additional side load, you can't really simulate the movements properly at all. I'm sure it's good for something. It's not terribly good for testing how the oil will actually move on the track."

      i do not concur entirely. while it is unquestionably true that the machine cannot create forces in excess of 1g (how should it - maybe if it spun around fast enough... :) ), i do not think it really has to. what matters here, in my opinion, is the resulting vector of force that moves the oil. the resulting vector on the track is, as you surely know, a combination of the gravitational pull plus centripedal force when going through corners. the resulting vector (always >1g) can be imitated by the machine in direction, but not in lenght. i think this to be sufficient to test the pump mechanism.

      regards
      jan
      • 6 Years Ago
      I appreciate the comments from educated people. But really talk is cheap. I would really like a tester like the one porsche built, it really works! I will never test in Germany or any where else probably but that tester will obviously get the ground work done on a dry sump system. And as was stated it is a lot cheaper than installing, pulling, driving, datalogging and repairing the rest of the associated components that would be involved with testing in a automobile. Which as was stated what it was designed for.
      • 6 Years Ago
      Schwing!
      • 6 Years Ago
      Just for bonus points: Ford created one of the world's first (if not THE first) such system for testing the engine they were to use in the GT40. It didn't tilt the engine, but it was a system that ran the engine at the proper load and shifted it as though it was at the track, and it was used for durability testing.

      Ford's system was done in the 60's.

      I almost never defend American car manufacturers, but this is one case where this is old, old news.
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