[Ron1]

I find it interesting that the link you provided is the exact write up from KB that I looked at 5 years ago. I don't put a lot of stock in any manufacturers claims, since they are in the business of selling you that product. Having said that, and in looking at the changes that have occured in the technologies over the past 5 years, the new alloys now being used for the forged pistons have eliminated the expansion problems that may have once existed. Ross, JE, Speedpro have all gone to the new alloys. All I can do is quote from publications by Joe Pettit and David Vizard, who make it very clear, that if you have the intent at some point of adding N2O, hypers are not the way to go.

If the expansion issues were real 5 years ago, form what I have seen and read recently, the issue was resolved.

I could be wrong, but for my application, I selected forged over hyper, knowing that the motor would see N2O sometime down stream. And the price difference between the 2 have come a lot closer.

Ron