fstarocka

working on a bone stock 350 marine engine, springs are 1.950 free height. only rotators on the exhaust valves, and the upside down cups (about 35 thou thick).. I cant see to find a matching free height spring, closest i have are low pressure 2.050 springs.. next available size down is 1.910 or there about.

Whats the better option? theres a 50 thou difference either way- im wondering if the springs have collapsed over time, motor looks about 10-15 years old and worked hard.

checked install height is around 1.7 which is in spec- do springs compress over time, as much as 80 thou?

sofakingdom

iTrader: (1)

What's the cam? What are we trying to do here?

There's almost NEVER such a thing as "too much valve spring".

Stock springs SUCK. Nobody in their right mind would pay money for those. Hell, I PAY people to come haul them off and make them go away... they have NEGATIVE value to me.

Never heard of a 8" rear. All my late 2nd gen Camaros had 8.5".

Rebuildman

Camshaft dictates spring required. Installed height sets pressures. A stronger spring requires stronger valve train to match. In an auto application, those drag and drive events are hard on the valvetrain when mountain motors used to go fast require big spring pressures.