We always loosen ours, but our dragster still seems to be a solid tenth slower when it comes back out for the 2nd year on a rebuild. It has happened twice in a row on two completely different engines. We loosened them again this year, but also plan to install new springs before the season starts to see if that helps.
You should have asked this question in the fall so someone with a good spring checker could attempt to bring some before/after measurements to the table.
It seems logical that a spring at rest will last longer than a spring that is compressed for any amount of time. The result is a spring that is not necessarily as strong as the ones that were at rest. The result is inconsistent high rpm performance. Of course with a Mopar, it only takes about ten minutes to "loosen the rockers" so we would need a reason not to do it.
Myth busters
Posted - 12/21/2009 : 21:30:50
