I am building a new motor for my 02 Harley and going to upgrade the the heads and springs.I was wondering how much seat pressure others were using on there heads.Most ported heads I have looked at are useing between 95lb to 110lbs of seat pressure.But I bought some springs and retainers from JDM and the the seat pressure for them is suppose to be set up at 125lbs.I was just curious to see what seat pressure others were using.I am going to use some new cams with more lift and I am going to run between 14 to 18 psi of boost.Thanks!

 

To be honest, I don't think you will get many answers to this or your torque converter question here in the HD forum.
You would probably be better asking over on NHTOC or in the Lightning forum here as it's the same engine to all intents and purposes.
There's a very intersting article on valve spring pressure on the Magnum Powers website here http://www.magnumpowers.com/light_spring.php and when I replace my converter, I'm going for a 2400rpm

 

Thanks for the info!