"hangus77" (hangus77)
03/17/2015 at 16:33 • Filed to: None
0
11|
"hangus77" (hangus77)
03/17/2015 at 16:33 • Filed to: None | 0
| 11 |
Good Evening.
I hope the end of the day finds you all with clear roads, mild weather, and non-shitty drivers flipping their family sedans on a completely clear day because they got into a tank slapper when they drifted off the road whilst looking at videos of cats playing the piano in sailor costumes, then jerked the wheel to get back on the road. You get the idea.
Anyway, I was checking out some upgrades for my ride and I found a turbo inlet hose which claims to be "reinforced" to prevent collapse in the event that a vacuum is formed from the turbo sucking air in. Is that actually a thing? I would think that with a standard, clean air filter on the other end that this would be a non-issue. AmIrite?
Also, on an Audi A5, is it necessary to do the down pipe with different resonator if you do the High Flow Cat as well?
wheelhop
> hangus77
03/17/2015 at 16:36 |
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If a turbo can spool fast enough then it will create a vacuum in the inlet piping and could collapse any soft hose. It's a rare problem but it is possible.
MrDakka
> hangus77
03/17/2015 at 16:44 |
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Check to see if it is reinforced around the circumference of the hose. Hoop stress is greatest principal stress and most pressure vessels fail due to this. While an inlet hose is not a true pressure vessel, much of the design principles remain the same.
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hangus77
> MrDakka
03/17/2015 at 16:47 |
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Are you James May?
Kidding. :)
Thanks for the scientific response!
uofime
> hangus77
03/17/2015 at 17:08 |
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Sounds like marketing jive to me.
Could it happen if you had a thin walled necked down (significantly smaller than the compressor inlet) pipe with a restrictive air filter, yes.
Is it a big problem you should be worried about, no.
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uofime
> MrDakka
03/17/2015 at 17:11 |
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Someone's take a solid mechanics course recently!
Quick, without looking what is the formula for the hoop stress in a thin-walled cylindrical vessel?!
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MrDakka
> uofime
03/17/2015 at 17:17 |
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Haha its been 3 years since I've taken that course; but I distinctly remember my prof endlessly repeating that line about hoop stress.
As for the formula, I think its 4 times something divided by something else? My prof would be disappointed :)
EDIT: Crap I failed Pr/t
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uofime
> MrDakka
03/17/2015 at 17:23 |
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It's been 5 years for me and it totally forgot the formula too, although its relatively trivial to derive.
I do remember my professors' side discussion about anarchists and the proper way to slash tires after the main lesson.
Mustafaluigi
> MrDakka
03/17/2015 at 17:32 |
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I had a friend who claimed he couldn't wear thin condoms. We nicknamed him Hoop Stress.
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MrDakka
> Mustafaluigi
03/17/2015 at 17:53 |
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Mustafaluigi
> hangus77
03/17/2015 at 18:12 |
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New hoses are only useful if you do have worn out pipes that collapse or leak due to age or wear. Its only really an upgrade if its bigger or less restrictive than the stock piece. I know on some Subaru's an aftermarket inlet hose helps with spool to make more power under the curve. Not by much but something.
Street Surgeon
> hangus77
03/17/2015 at 18:12 |
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Would a reinforced intake pipe be a good idea? Sure. Is it necessary for that little baby turbo? Nah :)