Machines | No More Exhaust Myths - /ENGINEERED
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Do you need back pressure? How big should your headers be? Today, we interview Richard Waitas, Senior Manager at Magnaflow, to learn how an exhaust system actually works. Learn on Monday, wrench smarter on Sunday. Introducing a NEW series on /DRIVE, aimed at educating you to build a faster, better, more reliable car: /ENGINEERED. We want to empower our fellow enthusiasts to know more, and do more, by learning from some of the best engineers in the game.
Comments
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Mufflers 16:20
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Awesome video, incredibly informative. Thank you for posting this.
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holy crap the factory is huge!
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Tri y headers don't work. Just a myth
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I was itching for him to relate the X-pipe to the 180° headers and flat-plane V8 crankshaft engine configuration. While it's only an approximation, the individual flows downstream of the X are more evenly balanced than with an H and this reduces the sound effects of having two cylinders on the same bank emptying into the same collector in immediate firing order sequence. This happens alternately, left bank then right bank, and gives the crossplane V8 its characteristic low-frequency rumble when either straight duals or an H crossoiver is used. Those of you familiar with the traditional SBC and its firing order (18436572) know that the 8-4 pairing dumps into the passenger side pipe and the 5-7 pairing does to the driver side. For very brief periods, the 8+4 and the 5+7 don't behave like, say, the 3 by itself or the 2 by itself, there's higher peak flow.
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yes...blowing is important too ;-).
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I learned this shit in HS. .....how about more on the likes of laminar flow, turbulent air??
....with some mathematics to go with it? Graphs, pressure curves to valve lift??? No mention of 180 degree headers, how they function, the REAL "bundle-of-snakes"(circa 1965)...obviously he is unaware of where this phrase came from...Whatever happened to the "revolutionary" "Anti-reversion" craze in header design, from twenty years ago?
This is far too basic stuff for me...nice review however... -
4 cylinders uses 4-1 or 4-2-1,
and 8 cylinders use two 4-1 or 4-2-1.
...so what the hell is in my Supra ( 'O_o) -
Awesome explanation of the exhaust system.Thanks for sharing.
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I have been trying for years to get these damn honda generation kids to understand this. Just like there GF's tell, size does matter. U need the size to go with the sound you want.
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First of all, I love this series and second of all, the intro was hilarious lol
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The factory exhaust system of my car is optimized for my car by its engineers and can't be improved on with an aftermarket system. People have tried and they just end up losing torque because there's not enough back pressure.
A lot of aftermarket systems are just good for improving sound. -
What is exhaust gas temperature what should it be?
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lol, blowing is important too.
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Wow-after over 45 yrs wrenching on engines I was pleasantly surprised by the knowledge put forth in this vid. Now, my question is do ALL header mfgs put as much in-depth engineering into their header builds as MagnaFlow or are they just slapping pipe together and moving product???
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That compressed air is hot, so speed of sound is way faster.
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"blowing is important too" tell that to my girl friend :,(
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This man knows his topic, unlike most of the big mouth here!!! I tip my hat to him!!!
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/engineered? forwardslash.fail()
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Think golfball dimples when trying to get what he's saying about the straight pipe flow rate vs absorption muffler flow speeds.