Originally Posted by
Epstein
Shimming valve springs is also a common way to get increased seat pressure on any setup, as long as you don't reach bind height with the lobe down. Just shim up the 2mm difference and be done. By the way, Ferrea duals come with some pretty big shims to get the seat pressure up on their kits.
And just because you've never heard of it or done it, doesn't mean that it's not a valid way to do things.
Now the main trick that could get in my way is the lower spring seats for the inner springs, if the valve guide OD is too big to allow them to fit on, that and that im not sure if my buddy with the parts im after has the inner seats.
You wouldnt happen to know anyone that might know the oem part number for the rnn14 inner spring seats would you Epstein ? Havent been able to find it yet, hopefully I wont need it, but hey i've got time to waste at work, so I may as well do something useful.