How to screw up Diesel combustion.

A clip taken from Killing A Duramax, Ep 14, Gale Banks reveals his collaboration with Comp Cams in the development of a new camshaft for the Duramax L5P engine. He explains how he analyzes each step in the 4-stroke process to withstand a higher RPM. He reveals why squish and swirl are so important to proper diesel combustion as well as valve timing, duration and overlap. He also details why he’s chosen a stock piston over ones with valve reliefs. This is the most information you’ll receive about diesel combustion outside of engineering school.

Watch the full episode.

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[thatguy]

I love when people complain about how much Banks stuff cost. This is why, the man knows his stuff, period. His customer service is also 2nd to none.

[bradpnw]

Everytime I listen to Gale Banks I learned so much he is an amazing master. God bless him 🙏❤️

[jsmall]

LOVE that level of detail. Barely leaves any room for questions b/c he's already hit it all.

[peterellis]

It seems amazing that such small changes slow down the swirl to such an extent that it matters, especially as they're outside the region where the main fuel injection happens in the piston bowl.

[Jokeroo]

This man is engine science at its best. He studulies and experiments to make it better. Hat tip to you Mr Banks.

[alexbourg]

We definitely got the wrong 80 something year old for president. This man is sharper than a surgeons scalpel. ❤

[Bear]

This is music to my ears!! Love this man!

[a.k.a.A.E.]

hey man.
you have a birthday in the next days !

after all theses years,

i am very surprise !

thanks for all the Innovations !

[ztwntyn]

So, it should be a vortex? I love listening to Gale. I’m not into diesel but always pay attention because what he says is so technical and with chemistry that you can apply it to anything. Air density... on stock stuff is mainly what I learn from him. What makes it better and worse. The rear diff cover makes great sense also

[alouisschafer]

We need to understand that especially turbocharged diesels are highly complicated machines and changing components promised to have a positive effect may not have that effect at all.

[cantiswolfe]

Do you know which direction the swirl is? If so could a softly ramped edge of the raised portion, mitigate the problem without decreasing compression ratio? Could the dish profile be altered enough to compensate for the loss on compression ratio without messing up the injector spray pattern?

[windstarpro]

Then, my next question would be: thoughts on the 'golf ball' piston from Speed of Air? Their claim, and people seem to be backing it up is that the divets in the piston crown causes turbulence in the laminar flow near the piston crown which creates tumble mixing fuel again. Is it the calculated placement of these divets that makes their product work?

[ftlbs]

What is the solution? Is the big cam juice worth the squeeze? Is there a wy to get a happy medium? I love the science of engines and combustion. Absolutely fascinating.

[AAlienGaming]

this guy rly is the god of engines ! hats of to u sir

[Anne_]

It stands to reason, barring unknown head chamber and valve particulars, that a flat top piston offers minimum impedance to the air / fuel mixing or mixture. Cylinder heads attempt much more now with multiple valves, variable cam timing, ignition, ect

[thefinalkayakboss]

Gale's a master of what he does, there seems to be a lot of people who take his wisdom, and mis-apply it to the wrong things though. This dude deals with race/hi-performance shit almost exclusively. Dont go getting yourself mixed up wondering why you see features in your economy engine that gale says are bad. Not everything he says is going to make sense outside the context of "i want every last watt of available power out of this motor"

[peted]

Probably why most LS engines don't have valve relief pistons.

[pai]

Y si se trabaja mas la cabeza del piston, se les da la misma distancia y profundidad para las valvulas pero en las zonas que son a escuadra se trabaja para que la transicion entre planos sea redondeada, asi eso ayuda al flujo/turbulencia del Swirl.

[neilh]

I understand this simple effect positive for one aspect and horrible in another. Basic 2 stroke motorcycle scavenging effect with swirl and exhaust expansion chambers

[what]

Solved by using bigger diameter bowls so that the cutouts take up less volume