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

Duke RocketBunny Nuggets
06/21/2016 - 12:39 |
236 | 2
RoyP
06/21/2016 - 13:09 |
108 | 6
Anonymous

In reply to by RoyP

8 lights probably will fit in honda

06/21/2016 - 15:12 |
44 | 6
Anonymous
06/21/2016 - 13:12 |
196 | 0
danisahne96

In reply to by Anonymous (not verified)

Lol made my day

06/23/2016 - 11:58 |
0 | 0
MikeEM

Wow, so cool.

06/21/2016 - 13:53 |
6 | 0
Anonymous

wow, even sort of sounds like cam lope at the higher “rpm”s. awesome visual aide :D

06/21/2016 - 14:06 |
48 | 0
Ben Anderson 1

In reply to by Anonymous (not verified)

Or a small two-stroke engine giving the beans.

06/22/2016 - 10:02 |
0 | 0
Tavi Birda

“…making for a more balanced engine that doesn’t need such hefty counterweights on the crankshaft.” That’s a bit misleading. Flat planes are less balanced than x planes. The reason wht they don’t have large counterweights is because the materials are very lightweight. X planes are heavier, smoother but lazier to rev, whereas flat planes run a bit rough and are very rev happy. That’s why Ferraris have flat plane V8s, and I don’t think they’re double cream smooth.

06/21/2016 - 14:10 |
4 | 4

Crossplanes create a rocking-couple on a crankshaft, which needs to be balanced with heavy counterweights. Has next to nothing to do with materials used. What the flatplane cranks do have however is vibration.

06/21/2016 - 14:50 |
4 | 0
yoad_granat

Drop the base!

06/21/2016 - 14:12 |
0 | 0
Anonymous

That V8 relay sound

06/21/2016 - 14:22 |
40 | 0
Anonymous

I can actually hear it on the dyno holy crap

06/21/2016 - 14:46 |
0 | 0
Anonymous

So that’s how teslas v8 engine looks like

06/21/2016 - 14:51 |
142 | 0