Legit or not? Alfadan’s 7.5L 4 cylinder
 

7.5L NA 4 cylinder that revs continuously at 5500 rpms and makes 650hp using a reinvented connecting rod and maybe Freevalve and Mahle is involved. Sounds too good to be true.

https://youtu.be/8alrpieveDg

My guess is variable compression rods like those used in the Infiniti motor, which should eliminate the need for balancing shafts. Mahle is working on special pistons. Freevalve is doing the heads and pulling off some major improvements in power and efficiency, which is allowing high compression.

Just a guess.

There is not one single word on the internet other than this video. Not one word. That makes me wonder.

Oh boy. All this new tech! Maybe in 50 years it will be as efficient as a BEV of 10 years ago.

You mean from other auto sources because there is plenty of other websites discussing the company? Marine engines don’t typically hit the radar of other motor journalists or publications, not for cars or motorcycles, even if there is some crossover.

I think there is potential.

What are you talking about?? Look at all those words I've just read!

See there @Tcoat , that's the reason you're not rich - you are afraid to get in on the ground floor of things. - :iono:

BTW, do you want to buy some humfrzcrypto coins??

I get all that but there is still zero info on this concept beyond that video. There is a bit on the development of some of the components yes but the the engine is not mentioned. There are marine sites that you would think would be talking about this if there was any real development.

You asked the question "Legit of not"? Why ask the question if you already feel you know the answer?

What I could deduce myself is that there is not much info online to go off of, but that it is probably not some fake scam because I doubt Freevalve or other companies would allow their name or reputation to be used in some crowdfunding scam.

I was hoping to hear more from engineers whether the claims are even within the realm of possibility. He talks about the historical limitations, but not as much about the proposed motor. The specific output isn’t that high, but this motor would have giant pistons and/or a long stroke. I guess I could wait for an Engineering Explained video on the limitations of such a motor.

https://www.thehulltruth.com/boating...boards-16.html

Found this thread ripping the guy and his design apart and his practice of trying to sell people on the idea of what it could be, yet can't seem to actually provide meaningful information. The owner is in the thread doing his best to defend himself.

Apparently the design patent is for a "scotch yolk engine." Someone on the forum linked the patent filing. I guess it is a sort of "holy grail" engine that nobody has figured out how to make it work. People are claiming the owner of Alfadan is intentionally hiding the truth about the engine design from investors because he doesn't want them to know it isn't really new or innovative. It just doesn't work, period.

They do not have Freevalve technology. They are using a normal cam-design. Most of their claims seem to be dependent on a "2 cylinder" prototype they outsourced for construction and testing and claim it will scale up, but they aren't releasing info on the prototype.

Also, it has 50% fewer parts and weighs 50% less because they are comparing a four cylinder to an eight cylinder. So the engine itself is not particularly innovative. They are just using numbers to trick people.

The guy used $250K in grant money to sell himself shares of the company so he has zero risk. He is now raising $1M with the goal of $25M and I see people are calling him out because that money may be used to pay salaries that include friends and family.

Basically, it is like a bad shark tank episode.

Numbers! Numbers! Numbers! Growth! Money!

What about the design?

Did you see my promotional video!? It talks all about it.

https://www.youtube.com/watch?v=n6OEtpKJSgU

Here are some confusing Shark Tanks to help you waste time if you are in the mood.

https://www.youtube.com/watch?v=PAbkCVUKnmA

I like his, "this is my last post" then proceeds to get worked up and posts again.

What a cluster eff that is. It almost resembles.....one of our threads :D

So this is like the Theranos of Marine engines... Hmm. Does the owner talk in an uncharacteristically deep voice?

RED FLAG!

Edit: The supposed "secret sauce" is that they figured out some magical connecting rod design that allows the piston to have a linear speed throughout the stroke, something doesn't occur currently as the connecting rod changes it angle as crank rotates and that results in dynamic piston speeds throughout the stroke that creates an inherent imbalance in Inline 4 cylinder engines. This necessitates balance shafts or a reduction in peak RPM as the displacement increases. Supposedly this secret connecting rod means there is no imbalance they can have very large displacement 4-Cyl engines that rev really high.

So uh yeah... Good luck with that.