Scale Model Running Challenger Flathead V8 By Ron Colonna
Bore: 1 in.
Stroke: 1 in.
Displacement: 100 cc
Max RPM: 6,000
This engine was built early in my gasoline engine building career. I received the castings and drawings as a Christmas gift from my wife. I had it running about five months later. This is the engine that creates the most interest at the shows. So much so that I've had to rebuild it twice because of wear. As designed, it had some major shortcomings. The conrods were bronze castings which promptly wore grooves in the crank. These were replaced with rods machined from 2024 aluminum. Pistons were remade and the engine fitted with rings made from the George Trimble method. Oil control rings are a necessity as the engine smokes badly without them. An electric start system was added and the engine now runs with the push of a button.
Supercharged home made Straight Eight by Desperate Dan Vid 2
Built in a shed, it fired up first go. I was hoping it would sound real
lumpy like a drag engine, but it runs too smooth, and it's too quiet even
with unsilenced 9" pipes! The timing was a pain to sort out the Rover
distributor runs backwards, I had to take the heads off to work out the
firing order!!! See the shed it was built in on Vid 1.
Added May 2012: OK, my nails are dirty, maybe because I'm an engineer &
build stuff? Maybe your nails are clean because you can't build eff-all &
just sit behind your computer? C'mon folk, get a life.
Scale Running Model Harley Panhead Engine by Ron Colonna
Bore: 1 5/16 in.
Stroke: 1 1/2 in.
Two Cylinder Four Cycle
No Castings Used
This engine was scratch built to a scale of 2/5ths or 40% of full size. The
bottom end was taken from a drawing of a Knuckelhead engine that I puchased
on e-bay. The top end was patterned after photos taken from e-bay of Harley
parts for sale. I also bought a Harley repair manual that helped with the
oil system. The crankcase was split into three sections instead of the
usual two for ease of machining. The ignition is solid state and I use a GM
coil which fires the two plugs simultaneously. Timing is advanced and
retarded with the timer body. Two rotating magnets fire a Hall effect
device at the proper times as per full sized points. The engine is large
enough to produce that lovely V-twin sound.
Artus mini V12 Motor Sound
V12 Modellmotor. we build this engine by self. please visit my website
-- http://www.artus-motor.com/ --
MotorConcept: Flat 12V - FERRARI 512TR
Réplique du moteur de la Ferrari 512 TR, entièrement réalisé de
manière artisanale par M. Daniel Aquilon, en Suisse.
Rendez-vous sur www.motorconcept.ch pour plus de détails.
1/4 Scale Running Model Offenhauser (Offy) Engine By Ron Colonna
1/4 Scale Offy 270
This is a 16 valve double overhead cam powerhouse, with pressure oil feeds
and dry sump lubrication. It is faithful to the prototype and uses the
famous cup type followers. Eleven inches long and seven inches high. 1.032"
Bore x 1.094" Stroke. 60 cc Displacement. (3.66 cubic in.) Compression
ratio is 9.5:1. Uses solid state spark ignition. (Hall Effect with dual
I knew a little about the famous Offenhausers, hearing about their
conquests at the Indianapolis Speedway while growing up. I didn't get
interested in building a copy of one until approached by Bob Washburn after
doing my Cirrus article for SIC magazine. At the time Bob was looking for
someone to develop the model, do the basic drawings, write machining
instructions, and build two copies of the finished engine, in a one year
time frame. He sent me all the data he had aquired at the time. I looked it
all over, but had to send it all back. I was busy on other projects and it
seemed a daunting task that I was sure I couldn't accomplish. I didn't
forget the engine though, and some years later, a gift of Gordon White's
book on the Offenhausers from my eldest son, put me in the frame of mind to
give Bob's proposal a try, but on easier terms. It took me two years to do
it all and I only built a single copy of the engine. I put my drawings and
machining instructions in book form and published it myself. It has been a
successful venture, but I was right about it being a daunting task. I'll
most likely never try doing anything like that again. The engine has been,
and is being built in many parts of the world. My copy has been running for
eight years now and is a fine performer with the throaty roar of it's full
World smallest V12 engine
Apparently the builder's name is Yesus Wilder and he only used three
materials to build the engine. Stainless steel, aluminum, and bronze.
All credits to him.
Early Run of My V-Twin model Engine by Terry Mayhugh
Just completed ... mostly machined on a Tormach PCNC mill with
SolidWorks/SprutCam CAD/CAM plus manual lathe work on the cast iron
cylinders, pistons, rings and crank. One inch bore with 1.25 inch stroke.
Built entirely from material from a local scrap yard. Plan set available
from Jerry-Howell.com. Mayhugh engine V-twin vtwin tormach howell
Renault 3.0L V10 at 20,000 RPM
Renault 3.0L V10 between 16,000 and 20,000 RPM
(Renault 2.4L V8 at 20,000 RPM
Some say its a V10 but I can only count 8 injectors...)