Flat plane crankshafts have been around for a long time, and they have both advantages and disadvantages over their cross plane counterparts. In this video, we look at the differences.

Comments

    • Nuwan Chamara
      Nuwan Chamara

      Very helpful. Thank you

      about 7 days ago
    • Isaac Valadez
      Isaac Valadez

      Why can’t you have flat plane ohv?

      about 16 days ago
    • zzzzzsleeping
      zzzzzsleeping

      Your delivery was too fast.

      about 1 month ago
    • Charles Nash
      Charles Nash In reply to zzzzzsleeping

      The firing order animation is way too fast to be of any visual value.

      about 1 month ago
    • Armando Boensel
      Armando Boensel

      Dude you made that so simple to understand.... thanks

      about 2 months ago
    • Rich T
      Rich T

      What firing order are you using on the cross plane crank ? Sure doesn’t look like 18436572.

      about 2 months ago
    • Hamilton S. Rink
      Hamilton S. Rink

      The crossplane sounds nicer at normal street speeds to me. The flat plane sounds very racy when reved up, but to my ear racy belongs on the race track.

      about 4 months ago
    • Occams Razor
      Occams Razor

      2:14 Assholes like that need to have their license revoked. If I actually got voted into office one day, that is a platform on which I'd run; stricter drivers license requirements.

      about 4 months ago
    • HotRodRay
      HotRodRay

      I still cant see how you can say that a flat plane crank fires every 180* as opposed to the cross plane 90*.
      180* x 8 = 1440*
      90 x 8 = 720*

      about 4 months ago
    • j lc
      j lc

      I disagree with the sound 'benefit' ;)

      about 4 months ago
    • Chris W
      Chris W

      How the hell can you compare a ford against a Ferrari? 😂

      about 4 months ago
    • Chris W
      Chris W In reply to Chris W

      Matt Clark fair point lol, but only if you mean the 1960’s.

      about 4 months ago
    • Matt C.
      Matt C. In reply to Chris W

      Chris W.; Answer: GT40

      about 4 months ago
    • S Userman
      S Userman

      Well, I think BOTH the cross-plane and flat-plane V8s sound AWESOME.

      about 4 months ago
    • Turkey Man
      Turkey Man

      To bad you used a ford.

      about 4 months ago
    • brett knoss
      brett knoss

      Would the issue harshness be less on a v12 because of the balance in 6 cylnders?

      about 4 months ago
    • Scott wads
      Scott wads

      So the question that comes to mind is why doesn’t dodge use the flat Plane crank technology especially in their newly released thousand horsepower Helephant Supercharged engine? my guess is the flat plane crank benefits are not really benefits at all. When comparing traditional engines and big horse power , and high torque at lower RPM I’ve noticed this Riding in the GT 350 mustang and in riding in a hellcat. the hellcat but put you back in the seat and accelerates very hard the mustang does not seem to accelerate as hard it was observed by several of my friends As well, though the hellcat did not rev as high it Excelrated very hard straight at lower RPM and shifted at lower RPMs the mustang had to Rev very high through all the gears.

      about 4 months ago
    • Joseph Nicholls
      Joseph Nicholls In reply to Scott wads

      Thats because the hellcat is pushrod & supercharged and makes big torque at low rpm, whereas the dohc gt350 reaches its peak power at higher rpm

      about 4 months ago
    • NVRAMboi
      NVRAMboi

      Really helpful and informative video. Thanks.

      about 4 months ago
    • Andrew Dean
      Andrew Dean

      Exhaust issue, just straight pipe each cylinder out the side of the car, problem solved

      about 5 months ago
    • jamesT40
      jamesT40

      always wondered how ferrari got tha "4 cylinder" sounding v8 which i love. higher engine wear in flat-plane engines i wonder by how much

      about 5 months ago
    • grabir01
      grabir01

      With tuned exhaust, the pulses can be timed and corrected with the dual plane crank.

      about 5 months ago
    • nosirrahx
      nosirrahx

      The German 4.0 V8 has a cross-plane crank and between the super low pitched V8 grumble and crazy TQ its probably not going anywhere for a while.

      Its all personal preference of course but that V8 is so good that it makes its way in many European cars.

      about 5 months ago
    • )Peron1-MC(
      )Peron1-MC(

      ah thats why i think supercars sound lame :P

      about 5 months ago
    • DerMetzger
      DerMetzger

      Could someone explain to me in a bit more detail the reason for cross plane cranks having "underperforming" cylinders, as mentioned at 2:54?

      about 5 months ago
    • DerMetzger
      DerMetzger In reply to DerMetzger

      @John Cochran ahh... Makes sense. Thanks dude.

      about 4 months ago
    • John Cochran
      John Cochran In reply to DerMetzger

      That's because of the exhaust scavenging. Two of the cylinders can't get their exhaust gas removed as efficiently as the other 6 cylinders.

      about 4 months ago
    • Daniel Lundberg
      Daniel Lundberg

      I have heard that the ford mustang has diffent length on the exhaustmanifold pipes to not make it sound like a ferrari. Does someone have pictures?

      about 5 months ago
    • Tribal Snake
      Tribal Snake

      I didnt get an explanation for why this type of crankshaft would break down faster, could someone explain?

      about 5 months ago
    • Wes M.
      Wes M. In reply to Tribal Snake

      180 degrees vs 90 degrees, it's obvious..... less stressful angle of attack of the engine's torque on the crank. Simply put that is.

      about 5 months ago
    • N8 Smith
      N8 Smith

      Is flat plane the same as boxer

      about 5 months ago
    • John DeRouen
      John DeRouen In reply to N8 Smith

      No - "flat-plane" refers exclusively to the crankshaft. As the video shows at 1:35-2:00, no matter which crankshaft design you use, the pistons themselves are 90 degrees apart, forming the V shape from which the engine gets its name at the top, between the two banks. All the diagrams shown in this video portray 90-degree eight-cylinder engines.

      Boxers, on the other hand, could be thought of as 180-degree engines, where instead of the pistons forming a V shape, they all lay flat with one another. The cylinders of the two separate banks will lay in opposite directions. https://www.beamng.com/attachments/engine-aerial1-jpg.278043/ This picture is a good illustration - the ridged protrusions to the left and right are the cylinders. It is my understanding that it is generally poor form to refer to boxers as "V engines with a 180-degree angle," as there are some engineering differences between the two. I don't know enough about either to tell you what they are, but hopefully my explanation helps.

      about 5 months ago
    • TheHeliHagrid
      TheHeliHagrid

      re-examine your logic at 3:50. nobody makes a V8 that fires every 180. crossplane are ‘smoother’ because they have counter weights . a flatplane is like two typical 4 cylinder engine interleaved, that doesn’t mitigate the vibrations, but don’t just accept what i type, confirm for yourself

      about 5 months ago
    • Darth Taco Slayer
      Darth Taco Slayer

      so basically grab some headers

      about 5 months ago
    • William Hurley
      William Hurley

      Great video, very educational and simple to understand. Cant wait to watch the rest of them! 👍

      about 5 months ago
    • Jeffrey J
      Jeffrey J

      Well done.

      about 5 months ago
    • Had_Built Not_Bought
      Had_Built Not_Bought

      Awesome explanation, bro...👍 hope to see in the future flat plane crankshaft on modern ls/lt v8 chevys!

      about 5 months ago
    • Stuart Cookie
      Stuart Cookie

      4:18 Jay could care less what this guy is saying as he is looking for a place to get rolling papers.

      about 5 months ago
    • Not Hitler
      Not Hitler In reply to Stuart Cookie

      Jay trying to get cross faded

      about 5 months ago