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10-10-2016, 03:00 PM | #45 | |
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10-11-2016, 01:36 PM | #46 |
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Sorry to learn about your engine woes. I just skimmed this thread and wanted to share a little information related to my personal experience with first supercharging and then later turbocharging a BMW 4-cylinder engine. From some of the engineering stuff i studied in college and have read, the tension loads on the connecting rod are reduced with forced induction.
For many years I have been tweaking a 1976 BMW 2002 which I completely restored back in the 1980's. The chassis has been powered by more than half a dozen engine variants ranging from one equipped with a high lift large duration camshaft and 45 DCOE weber carbs to an electronically fuel injected and turbocharged lump. While adjusting the fuel map for my supercharged engine on a Mustang Dyno the shop owner commented how well the little BMW engine breathed and insinuated that I could generate 75-100 more rear wheel HP if the engine were turbocharged instead. The powerdyne supercharged version of my 2.2 liter M10 engine measured 187 HP and 175 ft-lb torque at the rear wheels at 10 psi of boost. Trying to spin centifugal supercharger any faster with the 6-rib serpentine belt simply resulted in increased belt slippage. Torque was available across the entire rpm band and the car was a blast to drive but I wanted more. A few years later I had sourced and fabricated the parts required to turbocharge basically the same short block. I was capable of running higher boost (16 psi) and at the same max rpm the Mustang Dyno recorded maximum figures of 266 HP and 269 ft-lb torque at the rear wheels. I did not bother to try and calculate the power output at an equivalent boost level but any supercharger driven off the crankshaft definitely robs power. |
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10-22-2016, 10:24 PM | #47 |
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Not trying to start an oil thread but I picked up on the statement that the OP was using "BMW oil"
It would appear we are seeing a spike in engine failures on later model s65s. Seeing as many of us have seen or are seeing our final BMW service oil changes happening with "BMW MPower Turbo" 10-60 and not TWS... perhaps there is some correlation I lost my 2011.75 S65 with 17,003 miles on it in mid September . It's been sitting with BMW for over a month and it would appear any goodwill replacement on s65 engines is a thing of lore. |
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10-24-2016, 10:06 AM | #48 | |
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10-24-2016, 11:59 AM | #49 | |
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1 time after break-in 2 times on the anniversary All under warranty/maintenance agreement So 3 changes, 4th fill. Last time was the first time with BMW MPOWER TURBO 10-60 |
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10-24-2016, 04:05 PM | #50 |
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that is a low amount of changes, I think you're supposed to change it every six months.
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10-24-2016, 04:22 PM | #52 |
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10-24-2016, 10:07 PM | #53 |
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10-25-2016, 01:18 AM | #54 |
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I assume this is simple trolling. But I will bite. BMW says 15000 miles or every 2 years. However staring in the 2010-2011 timeframe they started doing yearly changes.
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10-25-2016, 10:27 AM | #55 |
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I assure you i'm not trolling. there are many posts in this forum that state 15,000 was way too high and mot recommend 10,000 miles or less (some do it 5,000-7,500). regardless of miles I think twice a year is not a bad idea especially since it's a $200 expense.
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10-25-2016, 01:13 PM | #56 | |
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BMW also claims some fluids as benign lifetime, if it is lifetime, they would warranty those associated parts for lifetime. Do not follow their recommendations!! |
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10-26-2016, 07:31 PM | #57 |
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So my 1 year oil change interval is some kind of problem. Despite the fact the car had just at 3000 miles on it last year and BMW interval is two years. This is not Dino oil.
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10-26-2016, 08:32 PM | #58 |
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It's one of those things that "Isn't a problem until it's a problem". Lots of owners abide by the factory intervals and have no problems, then some owners' engines blow up. Who's to say it's an oil quality issue?
With that said, I believe a year is too long for oil to sit in an engine- regardless of miles driven. Could that be the cause of bearing failure on a 17k mile engine? I seriously doubt it. S65 engines have inherent bearing issues. Some engines are worse than others. I've never opened an S65 that had conventionally acceptable bearing wear. It's not an issue derived from oil change intervals so don't sweat it. |
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10-26-2016, 10:03 PM | #59 |
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Good point, I just think it's worth the oil change price to change it at the minimum once a year. Even my boring e36 s50 motor I changed it twice a year. I'm sorry for thread jacking.
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10-27-2016, 05:31 PM | #61 |
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That sucks. Good luck with the part out.
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