which valve flows better on a NA h22a platform with worked head.. using stage 3 cams... aftermarket valves are better than stock.. but which....

Ferrea vavles
Skunk2 vavles
Crower vavles

which vavle is best for performance... meaning in terms of swirl polish, back cut, valve angle, stem undercut etc and design and fabrication not to mention if severe endurance tested or not.. ... stainless steel also not titanium... thanx..


what would be the weight of these also in grams if possible.

 

Why not Titanium?

I don't believe there's a lot of difference in the flow of the above listed valves. Even then, gross flow numbers don't mean alot. They would all have to be tested on the same engine to show performance differences. Different head shapes effect flow and performance at different lifts and different rpms, so unless you took your engine and in it's final configuration and tested all of them you really can't do alot other than ask a professional builder the head shape that'll work the best and get them custom ground.

Swirl Polishing and custom cutting would all be done by a machine shop after the fact.

 

KMS has valves specifically made for them..

http://www.honda-performance.com

 

Try to do a cost comparison between re-working stock valves over buying new valves and having the head worked to accept them. If a good shop is doing your port work, have them swirl polish the stock valve, trim the stem and radius the seats. A little unshrouding around the intake valves would do wonders in comparison to aftermarket valves and the fitting work...... Also, doing valve work lightens them which may help over buying new springs..... retainers are a must, though.....