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Standard , I've just supplied the guy with a good condition used replacement .
It made a hell of a whistling sound .
Mileage? Were the paper filters ever replaced? Little air impurities are not going to bang up a compressor wheel like that, unless the paper filter was very old, dirty, or damaged letting larger debris somehow pass through.
I think you'll find an air filter that doesn't get changed gets blocked and flows little air and even less particles as even less open structure .
Hard to think an air filter not getting changed considering the ease and cost .
So with that line of thinking, how do you correlate poor filtration in this particular instance to a damaged compressor wheel?
I’m not trying to play devils advocate here, but you can’t assume an OEM filter caused a turbo failure. Owner neglect, lack of maintenance, hammering the car when it’s not warmed up, not letting it cool off before parking etc... can all contribute to something like this happening. Even an unknown boost leak (like a small tear in a silicone coupler) could overboost the turbo to compensate for loss of boost pressure.
What you’re presenting here seems more anecdotal than a recurring issue or design flaw with OEM filtration. I don’t know if anyone that’s blown a turbo because of OEM filters, drop-ins, or even full intakes allowing foreign object damage to the compressor.
It's 200K and he said the previous owner was fastidious .
Now the turbo I've supplied him is on 240K and this is it .
I don’t think it’s unusual or unreasonable to see turbo failure at 125,000 miles (I’m assuming you’re saying he had 200,000 Kilometers). Turbos are wear items (bearings and internals will eventually start to fail and leak/burn oil) and that’s some pretty high mileage regardless of whether the vehicle was maintained well throughout its life.
I ran BMC drop-ins as well and they are a much better design than the OEM paper filters.
If you need to replace your OEM intake filters, and don’t want to upgrade to a full intake system, BMC drop-ins are a great alternative to OEM - especially when you consider the price.
I’m selling my BMC drop-in filters with 5k miles (basically brand new) for $75 shipped to the lower 48 if any one is interested - I’m running ModalWorks CF intake now.
I have a question about the filters sitting right by the turbos. Doesnt that cause the engine to take in hotter air, therefore hurting the power gains?
I have a question about the filters sitting right by the turbos. Doesnt that cause the engine to take in hotter air, therefore hurting the power gains?
No, when in motion the engine bay air is evacuated every few seconds. Our heat shields are designed to bias air entering the filters towards the fresh air moving across the top of the engine and help isolate radiant heat coming off the turbos.
We've done tons of 1/4 and 1/2 mile tests and there is no dramatic intake temp increase over factory with our intake, just lots of opened up top end performance, and great sound!
I get the idea but this is not at all a scientific test. E.g. he is shaking these filters different each time. And even worse the amount of sand is different each time. He is pretty much just conclusion shopping his hypothesis...
On a side note because you like Porsche - have a look under the hood of a stock 911 GT3 RS 4.0:
These are build by BMC btw. I don't think Porsche would use these if they're dangerous for the engine, right? And it's just an example. There are many more high performance cars like this from factory.
OEM's use paper filters because they do the job and they're cheap. They're designed to deliver the necessary air flow for the desired power with minimal overhead so that it delivers enough cfm even when it's almost ready to be replaced. The typical driver can't be bothered with cleaning a reusable filter. It's also inefficient to do this cleaning in the shop for a standard car - it's cheaper and faster to just throw the paper filter away and replace it. And last but not least - our AMG has to perform on a German Autobahn as well as on a dusty street in the desert. I have no desert in the vicinity so I personally can sacrifice at least some of this extra protection and enjoy more performance...
But if you're happy with stock power you can just use the paper filter and exchange it e.g. twice as often as it's recommended. Then you will have pretty much all the time the maximum air flow (for stock power!) and maximum protection.
I get the idea but this is not at all a scientific test. E.g. he is shaking these filters different each time. And even worse the amount of sand is different each time. He is pretty much just conclusion shopping his hypothesis...
On a side note because you like Porsche - have a look under the hood of a stock 911 GT3 RS 4.0:
These are build by BMC btw. I don't think Porsche would use these if they're dangerous for the engine, right? And it's just an example. There are many more high performance cars like this from factory.
OEM's use paper filters because they do the job and they're cheap. They're designed to deliver the necessary air flow for the desired power with minimal overhead so that it delivers enough cfm even when it's almost ready to be replaced. The typical driver can't be bothered with cleaning a reusable filter. It's also inefficient to do this cleaning in the shop for a standard car - it's cheaper and faster to just throw the paper filter away and replace it. And last but not least - our AMG has to perform on a German Autobahn as well as on a dusty street in the desert. I have no desert in the vicinity so I personally can sacrifice at least some of this extra protection and enjoy more performance...
But if you're happy with stock power you can just use the paper filter and exchange it e.g. twice as often as it's recommended. Then you will have pretty much all the time the maximum air flow (for stock power!) and maximum protection.
That is an aftermarket intake I think. They go for 7 grand.
That is an aftermarket intake I think. They go for 7 grand.
I assume you're referring to this google search result -> https://www.suncoastparts.com/product/RS40AI.html ? As you can see it's described as "Factory Porsche GT3 RS 4.0 Carbon Fiber Air Box". It really is the OEM intake for the GT3 RS 4.0.
But again - it's just an example. There are many other high performance cars equipped with similar high flow air filters. Why? Because in certain applications they work better than a paper filter with negligible worse filtration. Even if that is hard to understand for some folks...
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