the crazy thing is how tame both the 610 HP N/A, and the 872 S/C are....they make like 19 inches of vacuum... We turned one of the S/C up in R&D and almost hit 1000, but were out of injector! "Bigger" versions to come! I'd like a Nastier cam N/A that surpasses 700, and then of course a 1000+ S/C, but those will have to wait on our BluePrint Block.