04-02-2013, 06:54 PM
Ricky pretty much has it covered there, id just add, wind the spring seat anit clockwise a couple of turns and go for a test drive, then keep adjusting it up/down depending on how it drives. If theres too much preload you will struggle to smoke at all off boost which will make it sluggish, if theres not enough preload it will smoke terribly off boost and bog the engine/pump. It is a case of trial and error and you will want to adjust it to suit every time you change boost pressure/max fuel etc.