“If you pay attention, you’ll see it nose over at the end of the straightaway,” says Boyer. “The engine won’t accelerate any faster—it’s a classic symptom of insufficient compression.”
Selecting the compression ratio for a race engine is often influenced by the cylinder-head material: cast iron or aluminum. Aluminum heads dissipate heat faster than their cast-iron counterparts, thus on a specific fuel they permit higher compression ratios without detonation.
Read the entire story in the August 2013 issue of Speedway Illustrated by clicking the image below.