Don't read if you're close minded

I think Eric’s test was absolutely worthwhile. Was it scientific? Nope. Did it follow some methodology that engineers or engine builders would have followed? Nope. What it did represent was what probably 80% of the market would do at home on their own pile of crap hot rod. “I put a 750 on it and it slowed down”. Never checking for secondary activation or even WOT. Even walking around at a track I am amazed by the lack of knowledge people often have when asking questions about THEIR setup and how little they know about tuning it.
Eric’s test demonstrates how and why rumors or myths start about nonsensical crap in the automotive world and others regurgitating it. If your junk is faster with 5” vacuum at WOT you have a serious tuning problem.