Compression Bad or good.
Banzai Racing
Joined: Aug 2001
Posts: 2,632
Likes: 3
From: Indiana
Directly from our how to page
3 even bounces of 85 PSI or above is GOOD. Readings above 110 PSI are GREAT!
3 even bounces of less than 85 PSI: indicates that motor is tired, and indicates engine should be rebuilt before causing damage to rotors or rotor housings.
2 high and 1 low: indicates problem with side seal (stuck, cracked, broken, etc.)
1 high and 2 low: indicates problem with apex seal (stuck, cracked, broken, etc.)
NO bounces: either incorrectly installed guage or destroyed rotor and housing.
3 even bounces of 85 PSI or above is GOOD. Readings above 110 PSI are GREAT!
3 even bounces of less than 85 PSI: indicates that motor is tired, and indicates engine should be rebuilt before causing damage to rotors or rotor housings.
2 high and 1 low: indicates problem with side seal (stuck, cracked, broken, etc.)
1 high and 2 low: indicates problem with apex seal (stuck, cracked, broken, etc.)
NO bounces: either incorrectly installed guage or destroyed rotor and housing.
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