Originally Posted by propain
You got way to much time on your hands Quick.
Short answer... yes.... 3 failed. 1 valve stem beat to hell too. (The thread was pulled)
You can blame it on whatever you like... if you don't fix those guides you are not safe even with the SS valve. Also you add the bounce factor which adds unknown results at this time. The 200+ list is mostly made up of stock cars and who knows if they are DD or garage queens. Also most of them have been installed for less than 6 months so that's not exactly a good example of success... yet.
"The Fix" was used by many to simplify what some consider the proper course of action to address the problem. Its more of a slang term than a meaning to be taken literally. We are far away from officially calling it "The Fix".
As time progresses, it becomes more apparent that you and I are perhaps not that far different in our opinions on this matter.
I agree wholeheartedly, that with shot guides, any valve is likely to eventually fail.
So that introduces questions about the selection of materials for one's guides.
Many recommend manganese bronze for it's lubricity and more noteworthy, it's wear characteristics.
Thus far, it has come to pass that even fixes using the stock valves, as long as the guides were changed to bronze, have survived, though like you mention, it is still early, and that sample is even smaller than the one you refer to.
A wise man once said, "every solution, has a problem."
A fix, involving just the guides, but keeping the stock valves, which are "suspect" in the eyes of many, based upon the number and graphic images of failure instances, is a "problem" for some.
A fix involving the guides, but stronger and heavier valves, is a problem for some, due to concerns of potential ill effects from running the heavier valve.
So no "solution" dreamt up by human beings is going to be perceived as not having it's own "problem" by some observers.
Among the questions asked then become;
1. As the potential problems associated with going any particular route go, how much am I at risk for them?
2. Knowing that all options with regard to managing this problem carry risks, which risks are more tolerable for me and which risks are less tolerable for me?
For many in here, myself included, the potential risks of doing a fix involving just the guides, and sticking with the stock valves, outweigh any risk associated with replacing the guides and going to a heavier and stronger valve.
So far, both approaches are showing success, but in terms of numbers, in here, we're talking 280+, going the heavier valve/bronze valve guide route vs only about 20 going the bronze guide but stock or titanium valve route.
In terms of "time" though as you mention, both approaches might be considered "young" by some.
However, the bronze guide/stock valve approach is arguably "younger" than the bronze guide/solid stainless approach.
Hope that helps anyone reading it.
BTW, I'm talking about "fixes" only.
So before anyone comes up with "but 26,000 plus cars are running fine with the stock valves, the stock components are fine", I'd point out that I'm speaking of those who have either discovered problems or are concerned about problems, what has worked and what is working for them.