Re: VE and BSFC
If you're talking about the HP books version that explains sizing compounds in the "Tractor Pulling" section, that is wrong.
I believe it is meant as a seat-of-the-pants ballpark method and not a valid calculation tool.
If that's the book you're reading you'd be best to put it down now while your mind is still fresh and pick up a good copy of Maximum Boost by Corky Bell.
Oh, and I use 75% at 3000rpm, and 80% at 2800, 85% at 2500.
It's a 2v head with #### ports. Sure that's still pretty conservative, but I don't like surging turbos so I will always lean that way.
And what do you care about BSFC? This isn't a gasser, we aren't running Stoich.... (you cannot size a diesel turbo based on a presumed Air:Fuel) Diesels usually require a much bigger turbo for comparable power of a gasser. (Once again, rpm advantage of the gasser)