[Adger Smith]

I've never had a blown engine float valves and seen AF ratio change. I have seen one with too little spring pressure that had blower pressure keeping the intake valve open too long. It was blowing the valve off the seat. It acted like the cam was too big. The intake did finally close, but way late and it made no power and did some stupid surges. With a large valve and 12 lbs boost you had better have way more spring than you think is normal. Do the math 12 PSI x area of the backside of the valve... that just gets you started back to holding the valve on the seat... I just did a little quick math and with a 2.2 valve you need a min of 46 additional lbs just to hold the valve on the seat. That is over your traditional seat pressure.