Should I use Undercut valves?

[BATMANs]

Quick question for you performance gurus.

Would it be worth it to install undercut valves in place of stock ones? I popped my engine (replacing pistons and head gaskets) and thought of possibly replacing the stock sized valves with undercut ones to improve the cylinder charge.

Does anyone know what the NSX intake valve angles are?

I'm currently running 10psi~ and after the build (lowering CR to 9.5) would like to up the boost to 13~14 psi.

http://www.ferrea.com/sportcomp-valves-competition-plus-valves.php

http://www.ferrea.com/Ferrea_2011_Catalog.pdf

 

[stuntman]

Most people go with 1mm larger intake and exhaust valves -and corresponding pistons to clear larger valves.

 

[BATMANs]

Most people go with 1mm larger intake and exhaust valves -and corresponding pistons to clear larger valves.

how about the undercut portion?

 

[L_RAO]

I know it's a little late but here is the valve setup I went with:

Custom Manley "Pro-Flo" valves. The Pro-Flo series features a reduced stem diameter, which is another way of saying undercut.

36 mm (+1.0 mm) intake, 22 degree underangle, flat-faced
30 mm (OEM) exhaust, 25 degree underhead angle, flat-faced

I will have before and after flow bench tests on a Superflow 600 at 28 inches of water.

 

[BATMANs]

my condolences.