Re: Lifting suspension questions
Posted: 12 Oct 2010, 21:43
In my personal opinion, adding spacers to springs does not effect, or only very very marginally effects spring preload.
Only adding weight to the van or increasing gravity would effect spring preload. Adding spacers only effects the position of the suspension travel within the given range of travel. The only time when it would be necessary to increase preload on a spring would be to maintain the same (stock) suspension settings with a heavier load exerted upon them.
So, if you have added spacers and the shocks 'top out' what's needed to rectify this is to move the mounting position of the shock relative to the difference created by the spacer (not directly proportionate, as we all know the spacer size isn't the exact amount of extra height gained)
The overall travel has not been increased, the suspension's resting position (or 'sag point') has been changed. So really longer shocks are not required, unless you don't want to start chopping and re-welding shock mounts.
My 2p worth...
Only adding weight to the van or increasing gravity would effect spring preload. Adding spacers only effects the position of the suspension travel within the given range of travel. The only time when it would be necessary to increase preload on a spring would be to maintain the same (stock) suspension settings with a heavier load exerted upon them.
So, if you have added spacers and the shocks 'top out' what's needed to rectify this is to move the mounting position of the shock relative to the difference created by the spacer (not directly proportionate, as we all know the spacer size isn't the exact amount of extra height gained)
The overall travel has not been increased, the suspension's resting position (or 'sag point') has been changed. So really longer shocks are not required, unless you don't want to start chopping and re-welding shock mounts.
My 2p worth...