The cornerstone of Johnson Engine Technology™ (J.E.T.) is the owner, Bob Johnson.  Bob has been in the pursuit of speed for quite some time now.  When questioned how long he has had this interest he responded, "When God formed me in the womb; for as long as I can remember, I have been interested in performance."  After spending time in the navy as a machinist mate, drag racing (now vintage) muscle cars, drag racing motorcycles (winning National events), and working on an Aston Martin endurance racing project as part of a critical design team, Bob knew it was time to start his own business.  (To read the background on Bob Johnson and the knowledge he carries to get the business to this point click here.)  The 16 year old small shop has worked its way from being a one man backyard garage operation called Johnson Tuning, into an established, high clientele company, called Johnson Engine Technology™. 

We at Johnson Engine Technology™ have learned you can only afford to race what you can afford to repair.  Therefore, we acknowledge the need for a hand in hand relationship between performance and reliability.  By performance, we mean the ability to make peak horsepower and torque, while still having extremely good low end and mid-range power.  By reliability, we mean keeping the mechanical side of the engine in proper working order all the time.  So how have we learned to give an engine peak performance and reliability? By using principles of science ( knowledge, gained through testing theories to see if they are correct) and physics (mathematical relationships derived from science used to define the physical world we live in) we have learned what is takes to design cylinder heads so that camshaft profiles, compression ratios, and engine displacements can be minimized to attain performance.  These principles give us at J.E.T. the ability to take your engine, which is essentially nothing more than an air pump, and reconfigure the architecture of the pumping efficiency. These are the key factors in the design of a cylinder head, which so happens to be our specialty.

"The level of performance that you have achieved on my motorcycle with your head work is absolutely incredible.  Where once I had a lead sled, I now have a rocket! "-Artie Ferraro, "a very satisfied customer"

How do we design our cylinder heads? Don't believe it when they say bigger is always better!

Engineering of cylinder heads for any application, based on proven philosophy of design is our specialty.  We can solve problems in your engine development program through the design of heads and other components with in-house CNC replication.  See if we can set up a system for your own shop or assist you in any phase of your engine development (for contact info click here). 

Now, because every engine is an air pump, the object is to get as much air in the pump as possible in your RPM range (2,000-6,000 RPM).  Air, like everything else on this earth has a mass, therefore, the ratio of air to fuel in your engine also has a mass.  Because the ratio of air to fuel has mass, it also has energy (E).  Now because of the weight of the fuel, the weight of the air, and the chemical E found in the fuel and air, this chemical E can be transferred into horsepower ( HP ) and torque.  Therefore, the goal is to get as much of the air, as physically possible, in the engine so that its chemical E can be turned into HP and torque.  Therefore, cylinder head design is not just the attaining of peak flow numbers on a flow bench.  Cylinder head design is the design of the intake and exhaust port to be able to achieve the highest velocity with the highest mass. 

Bernoulli's principle states that when area decreases velocity increases.  As a result, what we at Johnson Engine Technology™ do is correctly size the port area of cylinder heads so that the highest velocity and highest mass flow rate that is physically possible, can be achieved.  Because our engine design relies on extremely efficient cylinder head design, other areas of the engine, such as compression, camshaft profiles, and engine displacement do not have to be at extremes to make good useable HP and torque.  Because we can offer engine combinations with low compression and smaller camshaft profiles, we can give you an engine that is the best one out on the road or the track, thus giving you the time of your life with your Harley®. 

For published articles about Johnson Engine Technology, click here.

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