RTU Engine
 

I thought this is very interesting?
RTU | discover progress

they don't state any of the work done beyond:

"To retrofit the existing engine to RTU patented technology, its needed to replace and modify, several key parts. Mainly the pistons and rings, control unit, and the entire intake manifold."

...... the idea behind an adiabatic engine is interesting, but i don't see how it could possibly happen with a modified production engine from only pistons, rings and the intake.

their "super motor" video shows a lot more than that, even with pixelated sections of video.

Maybe they only convert 2 cycles, I have will to get my Subaru 360 over to them.

Sounds like lean burn.

Lean burn, which this "RTU" technology apparently uses, tends to cause a slower combustion charge burn rate. This requires advanced ignition timing, and because the burn rate is slower, more heat escapes into the cylinder walls and the piston crown than with a stoich mixture.

You can achieve the same effect by ceramic coating the turbo innards with a ceramic coating.

Riiiiiiiiiiiiiiiiiiiiiiight.

And it sure would help if their spiffy animation didn't quit after 1 second.

Looks like a candidate engine to power the next unicorn vehicle.

It looks like one of their tricks is the use of ethanol probably E98. Ethanol with some type of ceramic coating on the piston tops combustion chamber and cylinder liners could help a ton keeping the heat inside with less transfer.

On my first lean burn Talon I'm sure I could of ran with a much smaller radiator maybe even without when racing it at the the drags. I would see coolant temperature drop from 200*F to 160*F at the end of a low 11 second pass on E85. But in traffic on a 95+ Summer day I would need a radiator.;) I'm wondering if RTU is saying in "race form only" you don't need a radiator or maybe just a small one at that?

The other thing about ethanol you can run very lean and not lose as much power compared to gasoline.

X2!

That actually is interesting that you could do that. RTU definitely needs to clarify their claim. I don't necessarily buy that their cooled-off intake manifold idea actually improves fuel economy.

This is why I have such mixed feelings about ethanol. But that's going to veer off into verboten territory...

I agree!!! RTU needs to show us that the RTU intake and the cooler IAT helps with fuel economy??? I would think it would make the ethanol fuel fall out of suspension?

I share your mix feelings when it comes to ethanol. I tried a little fuel economy testing using E85 but never got anywhere close to gasoline fuel economy figures.

It makes me remember the semi-adiabatic Elko Multifuel engine which was developed by Elsbett in the 80s, the first light-duty compression-ignition engine with direct injection.

Funny you should mention Subaru>>>>

Subaru engine for Le Mans revealed | Racecar Engineering

Now I'm a naturally sceptical kind of guy and this just seems like snake oil to me. If one of these dowes get put in the back of an LMP2 then I'll gladly eat my words as it destroys the opposition. But I'm just not seeing a lot of evidence and/or physical installation

All the pixellated bit can be seen in other shots as the engine goes backtogether in the video especially the port and the pistons.

My biggest point is the data. I'm fairly certain race turner worth their slat with a turbo that big, throttle bodies, and countless other thingscould ring 800+ bhp out of the 2.5/5 VAG engine....... for a couple of seconds. Like wise open the waste gates, retune the fuel map and @1850rpm 5.3l/km can be achieved..... again for a few seconds.

you know the old adage of if its too good to be true.......
especially when they state one set of mods yet can be seen doing a lot more.