The Second Series contains four videos that discuss what compression is and how it influences the performance & efficiency of your engine. How to do a compression and cylinder leakage test, calculate and modify the ratio, and choose the best compression ratio for your street or track application.
In this video, we explain the theory behind your engine's compression ratio, what compression is, and how it influences the performance and efficiency of your machine. After this explanation, we will dive into the practical side of things and explain how to calculate and modify your compression ratio. Last, we'll discuss choosing the best compression ratio for your street or track application.
Compression Testing - A vital AREA TEST - Assessing your engine's mechanical condition and ability to compress air and fuel is directly proportional to the engine's performance. A compression test is an AREA TEST that will give you an idea of the engine's overall health. To isolate exact problems, the next step is a Cylinder Leakage or Leak Down Test.
Cylinder Leak Testing - A vital PINPOINT TEST -
The Compression Test point out abnormal conditions. To determine the exact cause, another detailed test MUST be done. This test, called the Cylinder Leakage Test, is made to pinpoint exhaust and intake valve leaks, leaks between cylinders or into the water jacket, or excessive leakage past the rings. As you will see in the video, a quality Cylinder Leakage Tester is critical.
This video covers relative compression testing using a current clamp and oscilloscope. Comparative compression testing is a quick and easy way to assess the engine's mechanical condition during engine performance diagnostics. The instructor uses a - PicoScope 4425A and PicoScope 2000A Current Clamp.