Like I said I have never taken one apart after doing the water thing so I'm sure that your experieince has more clout than my speculation. I can say that the truck did run better after I did it but that might not have been due to a reduction in carbon.
As for the Corvair, there is documented proof that it works in this high temperature engine. There are hundreds of Corvair nuts like myself that have done it with great success. They are built to run hot. The concern and warning is alway that if your doing it and you kill the engine you'll never start it again.
Thanks for all the comments. I always learn something here. I looked into water injection and found an interesting site. <a href="http://website.lineone.net/~dave.cushman/mannject.html" target="_blank">http://website.lineone.net/~dave.cushman/mannject.html</a> This might work for those on a budget that have detonation problems. Might improve gas milage too.