Re: How much lift c'an a stock BB spring take
Valve springs are the absolute worst place to cheap out. If, or should i say when, the spring gets weak it will pull the top off of the valve and you'll drop a valve a possibly lose the whole motor. Get the absolute best valve spring you can afford even to the point of waiting to finish the project until you can buy good springs. I recommend Isky or Manley Nextek if a roller or Isky, if it's a flat tappet or hydraulic and good keepers and locks. The major cause of valve failure is weak springs.