Engine Theory / 5 posts found
Understanding the Rod Length and Pin Height Connection
The relationship between connecting rod length, piston compression height and compression ratio is often misunderstood, largely due to the misuse of the term “compression”. In all honesty it probably shouldn’t be applied to piston terminology at all except as it relates to the shape of the piston crown surface....
How to Build Racing Engines: Guide to Torque and Horsepower
Competition engines are designed and built to generate maximum torque and horsepower for their size and intended operating environment. Torque is the heart of the matter. Defined as...
Understanding Dynamic Compression Ratio
Your engine actually has two compression ratios, static compression ratio and dynamic compression ratio.
Effects Of Changes in Cam Timing and Lobe Separation Angle
The following tables provided by COMP Cams illustrate how variations in lobe separation angle and cam timing affect engine behavior. Engine builders can refer to these characteristics often to determine the likely effect of any cam timing alterations they may contemplate...
Engine Building Rules: Part 1
Engine projects frequently evolve in a hap-hazard manner, often based on a few components you may already have such as a block or a set of heads. As such the engine is often compromised for its required performance level and fails to live up to expectations. The importance of this cannot be overstressed...