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TKART magazine True or False | Squish in Kart Engines, what You Need to Know (and What You're Getting Wrong) - Part 2 of 3
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Squish in Kart Engines, what You Need to Know (and What You're Getting Wrong) - Part 2 of 3

Giacomo Mantovani
26 June 2026 • 15 min. read

In this second part of our mini-series (read part 1 of 3) dedicated to squish, we focus on engine behavior with respect to this fluid dynamic phenomenon. Thanks again to the technical support of Franco Drudi, R&D manager at LKE, the engine division of Lenzokart S.r.l., we address seven purely practical topics:

  • Two engines with identical squish values ​​offer the same behavior on the track.
  • Squish measured when cold is equal to what would ideally be measured with the engine running.
  • For maximum performance in racing, the squish value should be set as low as possible.
  • Simply measuring the squish height is enough to understand how the engine will perform.
  • The choice of squish can influence the heat range of the spark plug used.
  • The ideal squish value for maximum performance is always the one that poses the greatest reliability challenges.

The ideal squish value should vary with engine speed of rotation to obtain maximum performance
         
Editor's Note
For more information on this topic, we recommend reading the following articles:

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Two engines with identical squish values ​​offer the same performance on the track

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Franco Drudi

Head of Research and Development at LKE, the engine division of Lenzokart S.r.l.

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