Stock Mopar Valve Spring 'Load-Rates'

'More' Mopar Literature


273/180 HP {2-Barrel} ~ {1964 thru 1967}
* Closed..... #83 lbs. @ 1.69"
* Open..... #177 lbs. @ 1.31"

273/235 HP ~ {1965 thru 1967}
* Closed..... #98 lbs. @ 1.69"
* Open...... #210 lbs. @ 1.295"

273/275 HP ~ {'1966 D-Dart'}
* Closed..... #150 lbs. @ 1.55"
* Open....... #313 lbs. @ 1.05"

318/230 HP {2-Barrel} ~ {1968 and 1969}
* Closed..... #103 lbs. @ 1.69"
* Open....... #142 lbs. @ 1.30"

318/230 HP ~ {1970}
* Closed..... #92 lbs. @ 1.65"
* Open..... #189 lbs. @ 1.28"

340/275 HP ~ {1968 and 1969}
* Closed.... #114 lbs. @ 1.65"
* Open...... #245 lbs. @ 1.20"

340/275 HP ~ {1969 thru 1973}
* Closed..... #96 lbs. @ 1.65"
* Open..... #242 lbs. @ 1.21"

383/343 HP ~ {1962}
* Closed.... #100 lbs. @ 1.86"
* Open...... #248 lbs. @ 1.415"

383/330 HP ~ {1963 thru 1965}
* Closed...... #98 lbs. @ 1.86"
* Open...... #208 lbs. @ 1.43"

426/365 HP ~ {1964 and 1965}
* Closed...... #98 lbs. @ 1.86"
* Open...... #208 lbs. @ 1.43"

383/325 HP ~ {1966 and 1967}
* Closed...... #134 lbs. @ 1.86"
* Open........ #208 lbs. @ 1.43"

383/280 HP ~ {1967}
* Closed..... #134 lbs. @ 1.86"
* Open....... #208 lbs. @ 1.43"

383/300 HP ~ 383/330 HP {1968}
* Closed.... #128 lbs. @ 1.86"
* Open...... #240 lbs. @ 1.43"

383/335 HP ~ {1968 and 1969}
* Closed..... #129 lbs. @ 1.86"
* Open....... #258 lbs. @ 1.40"

383/335 HP {1970} ~ 383/300 HP {1971}
* Closed.... #105 lbs. @ 1.86"
* Open...... #234 lbs. @ 1.40"

383/290 HP ~ {1970}
* Closed... #125 lbs. @ 1.86"
* Open.... #200 lbs. @ 1.42"

440/350 HP ~ {1966 thru 1969}
* Closed... #105 lbs. @ 1.86"
* Open..... #234 lbs. @ 1.40

440/350 HP ~ {1970}
* Closed... #125 lbs. @ 1.86"
* Open..... #200 lbs. @ 1.42"

440/375 HP ~ {1967 thru 1970}
* Closed.... #129 lbs. @ 1.86"
* Open...... #258 lbs. @ 1.40"

440/390 HP ~ {Six-Pack and Six-Barrel}
* Closed... #115 lbs. @ 1.86"
* Open..... #310 lbs. @ 1.37"