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Registered
Join Date: May 2002
Location: Portland, Oregon
Posts: 12,712
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The chalk gets you close. The timer tells the story. If you are finding better times as pressures fall, keep going until it stops being of benefit. I would go in 5 psi increments as 2 psi may be too small to provide a meaningful change.
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Harry
1970 VW Sunroof Bus - "The Magic Bus"
1971 Jaguar XKE 2+2 V12 Coupe - {insert name here}
1973.5 911T Targa - "Smokey"
2020 MB E350 4Matic
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