430-435 CHP now.....What can I do to get 500-510 CHP?

[XfireZ51]

Originally Posted by Vette73

So basically when I sent out my plenum and I/Hs I should have been aware of Siamese porting? I'm guessing this should have been done when I originally had my porting done?

Or, is this modification have to be done in stages, and to get the most out of it, should the secondaries be relieved?

Juuuuuust a little confused....

There's no "silver bullet" to this. You could make the case that u should have had the heads ported and cams installed too. I think most of us have "upgraded" power on a step by step basis. I know I have. It helps if u r the kind that likes to constantly tweak things.