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And no, this was not posted on April fools. https://www.theautopian.com/bmw-wants-you-to-drive-with-an-air-compressor-attached-to-your-wheel/ What happens when it's not attached properly and flies off into somebody's head? -
By joshuaho96 · Posted
https://sci-hub.se/https://doi.org/10.4271/2005-01-3825 Heat causes positive pressure in the tank, a slight vacuum in the tank is normally caused by evap purge during normal driving. If the tank is cooled it can also cause a vacuum that pulls air into the system. The linked paper is quite interesting to learn the state of the art for evap fuel control, modern systems the tank is 100% sealed and the tank is reinforced to handle higher than normal pressure/vacuum. It only opens the vent/charcoal canister when you press the button to open the refuel door or when the engine is running. After some reading of systems like the W220 S-Class there's a check valve on the tank vent, but the primary reason it's there is because otherwise the intake manifold would be pulling vacuum on the tank: https://w220.wiki/EVAP_system There might be limited vacuum relief via the charcoal canister, but I don't know how sensitive the check valve is. -
me too wasnt real happy and cost me a penny or 2 to replace -
But there's the archetype for the name plate! Here's my view on that stupid TÜV ruleset. Buy a brand name aftermarket piece of equipment. In this case, the Mines front pipe we're talking about. Get it TÜV certified on the car. Damage the underside of it, say on a speed bump. Cut out the damaged section, replace with fresh metal. (For the sake of the argument only), continue doing that to the whole pipe until it is all gone, replaced with new metal. Is this grandfather's axe still the same front pipe? The design hasn't changed (much). The pipe walls are in the same places. The flanges are in the same places. It is functionally identical. How does this differ from a pipe that is ever so slightly different in fabrication (ie the number of welds in it, a few mm here and there in terms of where the pipes run, are joined, etc)? Anyone with 0.5% of a brain can see that there is absolutely no way that the performance (power, environmental aspects, noise, etc etc) of it can be any different than the genuine Mines pipe. Maybe even Mines made 2 versions of this design, with the same differences. How would anyone (say a TÜV inspector) ever be able to differentiate between them? And yet, they are so bloody anally retentive about this stuff. Mad. How upset would they be if you had the wrong spring washers on the flanges?
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