Here's A Visual Demonstration Of A V8's Firing Order Using A Bunch Of Lights And Relays

To demonstrate the uneven firing order of a conventional cross-plane crankshaft V8, this guy set-up an amazing display using lights and relays
Remote video URL

It’s important to note this demonstration applies only to more conventional ‘cross-plane’ V8s. In these engines, the firing order between the left and right banks of the engine aren’t ‘even’, meaning you get a left, right, left, left, right, left, right, right thing going on, which is what gives you the trademark V8 burble, and a less balanced engine.

Flat-plane V8s on the other hand are even with a left, right, left, right etc firing order, making for a more balanced engine that doesn’t need such hefty counterweights on the crankshaft.

In case you were wondering: according to the uploader, the fastest ‘engine speed’ achieved in this video was the equivalent of 1500rpm, which was apparently too fast for the relays to respond.

Via Reddit Cars

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Comments

Anonymous

try watching it on speed 2

06/21/2016 - 14:58 |
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Anonymous

even sounds a bit like it

06/21/2016 - 15:39 |
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Anonymous

Just like mine!

06/21/2016 - 15:42 |
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TofuDrifter99(Furry Squad)

When you want an LS1 but electricity is life

06/21/2016 - 15:47 |
8 | 0
Régis

Now you know why “Bundle Of Snakes” or “180° header” are so much better on X plane V8!

And very great noise too!
Not like two staggered 4cyl like Ferrari’s, and angry boat style conventional V8…

Raging & rich sound, the “real natural angle V8” sound
https://youtu.be/KEGUwvBG3rQ?t=39s

06/21/2016 - 15:49 |
8 | 0
Juha Arkkukangas

In reply to by Régis

What about the x-pipe? Wouldn’t that accomplish the same as 180-degree headers? 180-degrees are a pain to fit in a car and make properly.

06/21/2016 - 16:11 |
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Tibz

Thanks !!!

please, flat 6 :)

06/21/2016 - 16:12 |
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Anonymous

Fxxking awesome

06/21/2016 - 16:17 |
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Anonymous

Cant….Keep….up…

06/21/2016 - 17:24 |
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Anonymous

Not quite right: A flat plane crank V8 such as found in small ferraris is less dynamically balanced than a cross plane crank. However, the exhaust pulses are more shared between the left and right headers allowing for better power.

06/21/2016 - 17:40 |
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Juha Arkkukangas

In reply to by Anonymous (not verified)

Also flat plane has a primary balance, which cross plane does not. It creates a rocking-couple. That’s why you need the heavy counterweights on the crossplane crank

06/21/2016 - 18:12 |
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Juha Arkkukangas

In reply to by Anonymous (not verified)

Also you can balance the exhaust pulses on crossplane by using 180-degree headers

06/21/2016 - 18:14 |
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[ Insert Name Here ]

Actually sounds like a camaro

06/21/2016 - 20:21 |
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