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Category Archives: Engine Building

Reverse Engineering Unique Cam Shafts

One of the most sought after segments of Vintage Car Collecting is Vintage Race Cars.

Posted byDennis GertgenApril 24, 2009Posted inEngine BuildingTags: cam measurement, cam testing, Engine Building, vintage cars

Better than Perfect

When we think something is 100%, we typically think it is the best it can be, that is perfect.  One way of rating an engine’s breathing ability is called Volumetric Efficiency.

Posted byKevin GertgenJanuary 27, 2009June 22, 2010Posted inEngine BuildingTags: engine simulation, exhaust tuning, inertia tuning, intake tuning, volumetric efficiency

Buyer Beware

They used to call it “snake oil”, something of dubious value sold as a cure all for any medical condition.

Posted byKevin GertgenJanuary 22, 2009January 22, 2009Posted inCircle Track / Road Racing, Drag Racing, Engine Building, Street PerformanceTags: advertising, horsepower, magazines, traction control

When a Pound weighs more than a Pound

Sir Issac Newton in the 1700s developed the most important equation in all physics and dynamics, Force = Mass x Acceleration. 

Posted byKevin GertgenOctober 2, 2008Posted inCircle Track / Road Racing, Drag Racing, Engine Building, Street PerformanceTags: Acceleration, Rotating Inertia, Vehicle Performance, Vehicle Weight

Torque vs Horsepower, which is more important?

You’ve probably heard various racers and engine builders/tuners talk about torque vs HP. 

Posted byKevin GertgenSeptember 5, 2008Posted inCircle Track / Road Racing, Drag Racing, Engine Building, Street PerformanceTags: Drag Racing, engine performance, optimum gear ratio, shift RPM

Something for Nothing (power gains from reducing engine friction)

Most engine builders only think of producing more power by making modifications which allow the engine to “breath better”. 

Posted byKevin GertgenAugust 17, 2008July 8, 2011Posted inEngine BuildingTags: Efficiency Engine Analyzer, Friction, Mechanical Efficiency

Cam Test Stand: What follower to use?

I had a question from a potential customer for the Cam Test Stand.  He asked, “Do I need to use a different follower for each type of cam I measure?”

Posted byKevin GertgenAugust 6, 2008Posted inEngine BuildingTags: Cam Test Stand, camshaft measurement, flat tappet, roller follower

Engine Analyzer Pro’s Valve Train Dynamics vs SpinTron

The higher you can rev the race engine (providing it can breath well) the higher the power output.   The valve train has been one of the major roadblocks

Posted byKevin GertgenJuly 18, 2008July 20, 2008Posted inEngine BuildingTags: Valve Bounce, Valve Loft, Valve Motion, Valve Toss, Valve Train Dynamics, Valve Train Simulation

Standing on the Shoulders of Giants

The hot rodders and racers of today have a pretty easy time building 1 HP per cube or more. 

Posted byKevin GertgenJuly 14, 2008June 22, 2010Posted inEngine Building

Oversquare, Undersquare, and Bore/Stroke Ratio

Oversquare vs undersquare referrs to the Bore/Stroke ratio of an engine.  If the bore is larger than the stroke, the engine is considered to be oversquare. 

Posted byKevin GertgenJuly 2, 2008September 22, 2010Posted inEngine BuildingTags: Bore Stroke Ratio, Bore/Stroke Ratio, Oversquare Engine, Undersquare Engine

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