View Full Version : 100+ MPG true or false

jack grebe
02-10-2007, 07:16 PM
If nothing else, it makes a good campfire story......but I have to wonder:rolleyes:


S/V Laura Ellen
02-10-2007, 07:24 PM
Their web site doesn't build a lot of confidence.

02-10-2007, 07:34 PM
Over a 100 mpg is being done today with not much effort and producing considerable power. I believe it was Audi who smashed a world record for speed with a diesel and they did it with over 100mpg.

John Meachen
02-10-2007, 07:44 PM
Experimental vehicles have done much better than 100mpg.By a factor of several dozen.Take a look at http://www.bath.ac.uk/news/2005/9/12/ecofuel120905.html there are other contrenders if you have the time to look.

jack grebe
02-10-2007, 07:44 PM
I have to admit that I have ponder this very concept at times but did not make any attempts to construct a proto type. I go through cars fast enough without blowing them to kingdom come:rolleyes: . when I was young, my father knew of a man that did build such a contraption and boosted of 75 MPG. However, he sold out to big oil, after all, oil was cheap and plentiful, who would want such a thing?:eek:

jack grebe
02-10-2007, 09:18 PM
it's times when I find these things, that I really miss TheChemist:(

02-10-2007, 09:39 PM
Jack. I think the site you linked to is smoke and mirrors, but as others have said, there are plenty of 100 MPG cars around. I could get 60 mpg out of my 997 cc mini in the 70's, if I relaxed my lead foot. Big enough to carry four people and rooftop my Laser

jack grebe
02-10-2007, 09:46 PM
Yes, There may be some prototypes out there claiming 100mpg......but they're not a big old American car:rolleyes:

02-10-2007, 09:49 PM
I think you're going to have to accept the awful truth that you can't take a big fin Cadillac from the 60's, put a piece of magnetic ventilated vorticied copper bought from Popular mechanics for $5.95 and get 100MPG

Keith Wilson
02-10-2007, 11:43 PM
Well, it could work, but I know which way I'd bet.

100+ mpg isn't hard. The car has to be very light, very aerodynamic, have a small efficient engine (diesel is good) and not too much power. Adding a gizmo onto a conventional car won't do it.

Rick Tyler
02-11-2007, 12:00 AM
Building a 100MPG car is easy. Building one that will get 100MPG while carrying what you want to carry, be able to accelerate fast enough to keep up with traffic, and still be able to pull the Tejon Pass from north to south at freeway speeds is the problem. There is only so much energy you can get by burning a gallon of gas, and only so small and light you can build a vehicle that people can use and pay for.

02-11-2007, 08:46 AM
Efficiency studies. It reminds me of the AR5.


165 mph at 3 gph on 65 hp. It holds (held?) the speed record for it's weight and power class.


02-11-2007, 08:54 AM
There was a guy that made a conversion carb back in the 60`s that could turn a Pontiac or Olds88 into a 100mpg+ car. The principle was burning gas vapor instead of atomize liquid. I saw him blow hoods off the cars and melt pistons before he got it right.

High C
02-11-2007, 09:37 AM
...a conversion carb back in the 60`s that could turn a Pontiac or Olds88 into a 100mpg+ car...

U = q + w

George Roberts
02-11-2007, 03:38 PM
It is fairly easy to compute the amount of energy in a fuel.

It is fairly easy to compute the drag on a car.

Assuming 100% efficiency for the conversion from chemical energy to mechanical energy ....

The above math disproves most claims of high efficiency.

Certainly it is possible to get high mileage. I used to get 200 miles/day with no gas using a bicycle.

But as others have said the goal is to make useful transportation.