![]() the more you stress the compressor wheel, a failure of which could destroy the engine without warning. You dont really gain anything other than choo choo noises, but the harder you drive it, the more boost used etc. ![]() You could still easily get 100,000 miles, depends on how you drive it, manual transmission vs automatic, boost levels etc. If your turbo surges every time you lift the throttle dont expect the turbo to last the life of the car as it normally would. I did explain that its a fatigue problem and car manufacturers are designing for engine life to be long term, hundreds of thousands of miles. you get surge.Īnd youre right most street cars dont have high boost levels, so a little surge occasionally wont blow up a turbo in the short term. If you design an impeller like a hair dryer or a leaf blower you make the clearances around it so big it never surges - they are not designed for pressure but for flow so the clearance doesnt really hurt much, but in a turbo compressor when you do that. Slamming the throttle shut is effectively like putting your hand over the outlet of your hairdryer, little to no flow comes through but the impeller blades are still spinning and the pressure is still built up. At that moment air tries to reverse the flow around the edge of compressor blades to relieve the pressure. The sound produced is called turbo flutter (the slang term "choo-choo" is sometimes used)."Ĭompressor surge does indeed occur when the turbo operates outside its efficiency range - and that happens when you rapidly lift of the throttle, which doesnt need a mismatched turbo/engine combination.Ĭompressor surge happens when the pressure ratio across the compressor is too great for the flow occurring across it. "Blowoff valves are used to prevent compressor surge, a phenomenon that readily occurs when lifting off the throttle of an unvented, turbocharged engine. but you cant know that, so maybe just google what are BOVs for. Sure, I mean im just a mechanical engineer with over 20 years in the industry of turbocharged engine development. Will my husband divorce me if I dehydrate tomatoes in his F-150 truck?ĭennis Collins, a Highway Accident Investigator at the National Transportation Safety Board The wonderful and epic tale of Yoshi the Yarisįorget the trunk monkey, check out trash pandas. Trying to identify a car? Try /r/whatisthiscar, /r/namethatcar, or /r/rbi.įor information on content removal, user warnings, and bans, please see the Chain of Action page. Create a text post that includes the link and your thoughts on the subject matter.Ħ: Users will need to participate in threads created by others in /r/cars before being able to make their own threads.
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