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11-23-2012, 12:06 AM | #23 | |
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MY07-09 had known rod bearings issues that BMW redesigned & replaced (which probably explains the motor failure). Even ESS acknowledges this with a disclaimer at the bottom of the description for each of their S65 Supercharger kits:
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If the car is no longer under warranty & you've got the funds, I'd say crack the motor open & lower the compression. Since you mentioned supercharging it as a "winter project", go all out & make BIG power Last edited by benzy89; 11-23-2012 at 12:12 AM.. |
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11-23-2012, 10:19 PM | #24 |
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ess only has this warning on 2 of their 4 supercharger kits.this one,for example,is rated up to 775 hp,makes 585 hp,and is suitable for all e90 m3's from '08 on-
http://www.esstuning.com/products/E9...er-System.html i discussed this rod bearing issue with 2 friends of mine who are bmw techs.they don't believe the earlier e90 m3's have a rod bearing problem.they just said the newer ones are tighter,and better suited for supercharger application. if ess offers a kit capable of 775 hp on an 08 or an 09 with the original rod bearings,the motor must be pretty sound Last edited by bimdo; 11-23-2012 at 10:24 PM.. |
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11-23-2012, 10:54 PM | #25 |
Id rather be boating...
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11-24-2012, 02:49 AM | #27 |
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On the s62 its an oil starvation issue on rods 7/8 farthest from the pump... I've discussed this with dry sump guys and the problem disappears with dry sump oiling... Why BMW doesn't do dry or pseudo dry sump oiling like Porsche and now even Chevy on some of the LSx engines I don't know...
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11-24-2012, 02:10 PM | #28 |
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Per factory docs:
Two oil pumps are installed in the S65 engine; the oil return pump, which is driven via a gearwheel by a crankshaft, and the volume flow-controlled main oil pump, driven via chain drive by the oil return pump. The duocentric design of the oil return pump ensures that oil is always available at the inlet pipe of the main oil pump in the rear area of the oil pan, i.e. even when braking sharply from high speeds. The electrical oil return pumps installed in the S85 for scavenging the cylinder heads are no longer required, which results in a furtherweight saving. This is made possible by the lower number of cylinders, modification of the oil return routes, and the large capacity of the oil pan. The oil pan has a capacity of 8.3 litres (S85 9.3 litres). The oil supply is also guaranteed at extreme longitudinal and lateral accelerations of up to 1.4 times the normal gravitational acceleration. So it looks like changes would only be necessary if we're dealing with forces greater than 1.4 times the normal gravitational acceleration.
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11-27-2012, 07:04 PM | #30 |
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Maybe someone has better information than I do, but according to RealOEM rod bearing part number has not changed since 2008, but the main bearings have, as of 10/2008. So I don't know what rod bearing update would be made?
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11-27-2012, 07:18 PM | #31 | |
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11-27-2012, 07:47 PM | #32 |
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i probably misunderstood their explanation, but was comforted by their conclusion.they're good buddies of mine,and would be straight with me if they knew of a problem.
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11-28-2012, 07:44 PM | #35 |
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Not always, but in most cases it usually is better
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12-03-2012, 10:09 AM | #36 |
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OP, you sure you're not selling extended warranty's? Let's see some pics or some kind of proof this actually happened.
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12-03-2012, 11:10 AM | #37 | |
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Quote:
So for you to say ESS offers a kit capable of 775 on an '08/'09 with the original bearings, is INCREDIBLY misleading. Also, if you're gonna go LC & replace/upgrade the internals, what makes you think that the OEM bearings aren't gonna be replaced Last edited by benzy89; 12-04-2012 at 01:09 AM.. |
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12-08-2012, 01:31 AM | #38 |
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Its official I'm getting a new motor. I'm going to pick up one of my wheels tomorrow and I will try and get picks. FYI for higher horsepower boosted applications you generally want to run looser tolerances.
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12-08-2012, 11:53 AM | #39 | ||
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I understand ESS has this disclaimer, but I also know BMW hasn't change the part number of the rod bearings, and neither has the bearing manufacturer -- Mahle/Clevite-77. But I also know that the main bearing part number has changed, and that's got to tell you if the rod bearings changed, then so would their part number. Quote:
I've built my own motor. Those of us who built our own motors and measured our old '08 bearings can tell you they spec exactly the same as the ones you buy today. |
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12-13-2012, 01:48 AM | #42 |
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Some more photos
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12-13-2012, 03:55 PM | #44 |
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Wow, bad bearings, scored cylinders, and detonation damage to the pistons(?). That motor is trashed.
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