Selectric Typewriter Museum
Copyright © 2000-2006 Jim Forbes
Home
Computers/Electronics
Office Machines
Cars
About the Museum
Cathode Corner
Sierra Vista Car Club

High Mileage Car Project

This is what I worked on my last year in college--the University of Arizona, from which I graduated in 1983 with a BSME.

This car was designed and built by myself and three other engineering students.  We planned to participate in a design contest, to see which school could get the most mileage from a car powered by a 2 hp Briggs and Stratton gas engine.  The car had to have at least 3 wheels, be able to average 15 miles per hour, and burn iso-octane fuel (highly refined gasoline).  I worked on the engine, and I also wound up driving to Michigan and entering the car in the competition.  I think the other students lost heart after I crashed the car on a test drive--I think this picture is after the crash?  notice the bent wheel.  My girlfriend and I repaired the car and made the trip, and had difficulties in the competition, completing only 4 of the required 6 laps before the starter drive broke.  We calculated our mileage on the aborted run at about 500 mpg.

Some engine pictures (click to make bigger)

I designed and build the billet aluminum overhead valve cylinder head.  I started with a two inch thick block of aluminum, and using the lathes and milling machines and other equipment in the student's machine shop, I carved a wedge chambered head, and build the rocker arms and pushrods.  This head made about 3 horsepower on the small water brake dyno, and the specific fuel consumption was significantly less than the original flathead design, mostly because I almost double the compresion ratio.  Pinging at 10:1 compression is not much of a problem with 100 octane fuel.  Notice the modified coil mount that allowed me to move the coil to where I wanted for optimum timing.

Here's a story about the competition that appeared in the Tucson paper: