New Fuel Economy Information site

[freebeard]

I wouldn't know until I tried it.

I suspect a Turbo Encabolator level troll. I'm not going to take the bait.

[mpgmike]

Several years ago I cranked out a couple informational videos covering fuel economy topics. There are a couple episodes talking about my automotive icons. In particular, I did one on my personal automotive hero, Larry Widmer -- "The Old One". This guy worked magic with engines. How about a 1.8 liter Honda, 13:1 compression ratio, 30 psi boost -- AND ON 93 OCTANE PUMP GAS!!!

https://www.youtube.com/watch?v=n8HOjrD3Z7k

[mpgmike]

Back in the 1990's, before the internet, I was sending money every paycheck to H&A Industries for fuel economy info. The renowned "200 MPG" book trilogy from Allan Wallace was probably one of the most influential products offered -- not only influencing me, but thousands of other folks. I met Allan in 1999. He is from Texas, but was in Salt Lake because his daughter was undergoing cancer treatment there. The picture is of me, Allan, and my best friend at the time Grant Goldade.

Part of the MPG Basics video series, I did a segment on Allan Wallace.

https://www.youtube.com/watch?v=O4O42wbPl8A

[mpgmike]

Also part of the MPG Basics video series, Engine Physics Explained:

https://www.youtube.com/watch?v=4J9a4hBLH4U

[mpgmike]

A bit out of order, the MPG Basics series began with an introductory Basics video.

https://www.youtube.com/watch?v=3rRi...ature=youtu.be

https://www.youtube.com/watch?v=mXXJ...ature=youtu.be

[mpgmike]

Not from our site, but found some interesting info today.

https://arstechnica.com/cars/2022/06...assed-testing/

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

[mpgmike]

One thing I have found is that replacing oxygen sensors with parts store versions almost never works as well as using OEM parts (I know, at 2X the price!).

https://www.youtube.com/watch?v=j4MWTn9Okb0

[RustyLugNut]

Originally Posted by mpgmike

That makes my point perfectly! It isn't enough to simply burn the fuel, it really matters when it burns in the combustion cycle, and how quickly. Burning out the exhaust manifold contributes absolutely nothing towards making power at the wheels. However, the emissions analyzer will show that it got burned.

Engineers use the term Critical Crank Angle (CCA) to denote the optimal phase of crank angle where highest peak cylinder pressures do the most good; usually 17-18 degrees ATDC. With a slow burning charge, it takes more ignition timing advance to build pressures by CCA (which can have disastrous side effects). Faster flame propagation and oxidation rates allow more conservative ignition timing while still delivering the goods in time. Furthermore, a faster burn rate is more likely to oxidize more fuel within the combustion cycle than a slow burn. In other words, a faster burn is able to release more of the chemical energy within the "magic window" when the engine can convert it to usable kinetic energy.

So your observation that it is not an issue of unburned fuel is correct; it's an issue of when-burned fuel.

. . . That your magnetic device does not improve combustion beyond the 99.8 whatever percent modern vehicles are already capable of? Agree to that point and don't move the goal post . . . oh you just did.

Now, it's that fuel is streaming out the exhaust system, happily burning away! Is this correct?

[mpgmike]

RustyLugNut, I read your post several times over the course of several hours and I still cannot figure out what you're trying to say or ask. Could you reword the question?

[mpgmike]

While looking for something else I stumbled across another video that wasn't loaded on our video page. It's on Combustion Efficiency.

https://youtu.be/S0es9bS3K3A