Відео

Really liked this, and the insight about the flatplane crank and the crossplane crank.

simple clear explanation.

Both the flat-plane and cross-plane crankshafts in this video are arranged incorrectly. Flat-plane crankshafts in real life (with the exception of the Ford Voodoo engine) are up-down-down-up, not up-down-up-down. Cross-plane crankshafts in V8 engines in real life are up-right-left-down or (more rarely) up-left-right-down, not up-right-down-left or up-left-down-right.

Great video thank you for your time making it 🎉

This is by far the best video I have ever watched that explains something needed to be explained. Wow. 🙏🏻

Yeah...I still like the way the cross planes sound...

I've watched many IMSA races with GT cars and the growl of the C7 and Camaros always turns heads. More than the exotics.

One small error in the verbal description - flat plane crankshaft engines fire every 90°, not 180°. Two revolutions, 8 cylinders, one ignition every 90°, as the cylinder banks are 90° apart.

One correction, even with a flat-plane crankshaft, a V8 has power pulses 90 degrees apart, not 180 degrees. 4 cylinder engines have them 180 degrees apart. The reason flat-plane is rougher is, like you said, secondary imbalance, just like a 4 cylinder engine, so at certain RPM/load conditions, it "buzzes" just like a 4 cylinder. What makes it particularly objectionable is that above and below the resonance points, it is V8 smooth, so it is a big contrast. 4 cylinder engine, in contrast, aren't very smooth at ANY RPM/load condition.

The traffic junction example is soo real I see it every day on the junction near home

That's why a flat plane crank is better for a 180° V, than a more acute angle.

Sorry have to disagree. Cross planes sound better.

Best video out of the options given when searching for difference between cross and flat plane crank. Very easy to understand if you have no idea of the concept. Thank you.

The firing roughness section is fundamentally incorrect. Any 90 degree V8 fires a cylinder every 90 degrees of crankshaft rotation, with any crank configuration (cross-plane, or either flat-plane firing order).

The flat-plane crankshaft shown is not the same as an inline-4 crankshaft, because the cylinder order is different. The illustration is sometimes called up-down-up-down; that would be horribly unbalanced for an inline-4. Inline fours use a configuration which is sometimes called up-down-down-up when used in a V8. While only one works for an inline-4, both work for a V8.

Do the flat plane motors really fire at 180 degrees? I’ve read otherwise.

I DONT CARE

Can you explain why do some cylinders underperform in a cross plane v8????

The ''Flat plane crank'' you showed is exclusively used in de Shelby GT350, all others are mirror images just as 99% of inline 4 crankshafts. Also, a flatplane crankshaft V8 still fires every 90 degrees thanks to it's 90 degree bank angle instead of 180 degrees like you said.

Excellent video. Well done! It somewhat makes sense to me now 😅

Excellent, Thank You!

Two individual crossplane crankshafts with 4 cylinders each joined with gears. Not a V8 but two inline four with crossplane crankshafts. And with a checkered timing pattern.

👍Close but not quite. You did a pretty good job of copying/plagiarizing my online published research of the single V8 cranks vs dual plane V8 cranks some 10+ yrs ago on various forums, though you got a couple items a little off. Flat plane cranks fire every 90° of crankshaft rotation like the dual plane does but in a different sequence as you accurately outlined in the exhaust pulse timing of each bank, it does not fire every 180° as you claimed. . Also, “generally” larger displacement will suffer more vibration in a single plane crank but as a result of the stroke and the rod-to-stroke ration, (the 2nd order Harmonic you mentioned), that is the cause of the single planes NVH, not displacement alone. If you build it with a larger bore and shorter stroke yet with the same displacement this NVH will be less. In short, the displacement alone does not determine the NVH with single plane cranks but the stroke AND the rod to stroke ratio does. In-line 4 cylinders suffer the same NVH from 2nd order harmonics and are “buzzy” feeling as a result. Hope that helps clear up a couple of the misconceptions. 😉 BRAAP

European Flat Plane Crank engines are better than American(Ford 😏)

Are they nondular iron or steel ?

Excellent. Thanks

this was a very well made, understandable and smooth video. nice job!

To solve reduced engine life, you have to create bigger displacement/bigger engine. Take the Ferrari 6.5LV12

Ha! Now I understand. And I don't understand nuttin. Well played. ps-traffic animation so so funny. Thanks

bro de crankshaft is wrong because the is diferent

So the benefit of flat plane is sound? Seriously?

Your video are great, very usefull and simple to understand. Sad to see they are only 3 of them, i watched every one of them. Thank you for your work

2:13 is where I liked the video.

A big, strong man digging a 100' trench with a big shovel vs another man shoveling with a small shovel but twice the speed. Big guy is gonna get a lead then horse power comes up on him toward the end. A good engine will carry horsepower longer before horsepower numbers start dropping faster that torque numbers. Rpm is king on a NA engine

reduced engine life. 6.6 ford from 73 still runs . only cylinderheads were overhaouled to get more bigger😃

No a cross plans sounds way better;

Can a flat panel crank and cam be put into a standard Chevy, or Mopar v8 ?

I dunno bot the roughness, I had a 1986 Nissan 4x4 hardbody and it had an inline 4, at stop lights I would reach and turn the ignition, then find a grind cuz it was actually running, it was so smooth and so quiet, I kid you not, it ran so well you couldn't tell it was even running, not a single vibration anywhere, this was 1986.5 with TB injection, so that statement is far from correct, you cannot get any smoother than not moving at all.. it was as smooth as if the engine was not running, no jokes, so quiet, even with the hood up no fan noise nothing.. Japanese engineering at its best

The gr350 is old news flat plane. The new one and the better one is the new Z06.

Cross plane 8 cylinders have a soft spot in my heart tho. The sound is one of a kind.

Perfect thank you! I only just finished watching that episode of Jay and was going hunting for a video on flat plane cranks. Nicely done 👍

I disagree about sound being an advantage. Flat plane cranks sound like ass

Well on my 351 C 1970 Mustang I had 4 into one headers then a big X-pipe, made the engine sound like a flat plane crankshaft, so those two exhaust pulse's didn't share space. Kinda sounded like a bullet bike or formula one car

Great explanation! Easy to understand. Thanks!

Except the common SBC V8 firing order is 18435672 and Ford's GT350 flat plane crank is 15483726 you'll have to redo your graphic.

No big woop. Every Toyota Corolla has a flat plane crank.

Great video, subbed.

Thanks for explaining this so clearly, do you think that a 4 cylinder with a cross plane crankshaft would work? Like in a passenger car.

personally, i prefer uneven firing intervals of cross planes due to their sound. plus, i’m not power hungry as long as the car can do 0-60mph in 5s.

How is a cross plane crank traditional? The vast majority of engines are flat plane.