Patrick, you've just enlightened me!!
Check my other thread - last post on the 'too much power too quickly with 8 barrels' discussion.
I think I have the opposite problem where secondaries open suddenly resulting in a dangerous behavior (the engine develops 560 hp and everything kicks in around 4000 rpm at about 50% throttle, which is quite a surprise).
I'm going to investigate the secondary opening springs.
thanks again
