Originally Posted by mxhideout
Pic was before it was moved. Ok, because when we moved it to WOT they would open 2/3 of the way. So you're saying that vacuum opens them the last 1/3?
Secondaries are only operated by the vacuum, no mechanical action on this setup. However, if you are able to develop more throttle/rpm by moving the throttle cable connection point, and a consequently a higher vacuum, then they would open more/wider. There are also several different springs that can be used within the secondary vacuum assembly to alter when they start opening.