1NZ port & polish

[mikeukrainetz]

listening to all this amazes me, im really not used to the import engine build and the lengths people will go to for 5 - 10hp. what I am used to is gaining 60hp with an aftermarket set of heads for a small block. It seems like theres maybe one or two here who actually know whats involved in a P&P job. Its not one of those DIY on the weekend kind of things. Most people, even shops who arent familiar with certain types or model variations of heads can ruin a 1k set of heads by removing too much material. people also think they can just hog out material to the max and expect huge gains in flow. Ive seen heads so thin they literally cant hold water. Overheating winds up being a problem and cracking around valve stems. The only way I can see this being a justifiable expense is if the bottom end is built and your boosting. I wouldnt worry about valve size either.
Are you guys actually serious of doing this to this engine? If so go with the advice of a good shop with a flow bench.
Just because the heads flow better wont net you much without opening everything else up.