A couple years ago when I was looking for a big cubic inch engine for my dragster at the time. I really was looking at dynoflo stuff.
I went on DRR and asked around, I did not hear one good thing about them. I tried to search the topic but it has been too long ago and DRR has since switched servers. But I remember one of the posts very well, it stated you wouldnt find any people in and around vegas using their products with much success or HP.
Now I dont know if any of that is true, but when I was looking to build, I asked around. I knew then I would go somewhere else.