Just a little FYI, Bandimere speedway in Colorado sits at an elevation of 5,860 feet above sea level. I used to live out there, lots of guys out there running boosted stock block hondas with pretty impressive numbers. In fact, there's one for sale: Race Car For Sale
__________________ 1990 300ZX 2+2 - Current
1991 CRX Si, ZC Swap Si trans - Sold
1987 RX7 GXL, TII w/5spd swap - Sold
^ Elevation doesn't affect FI cars like it does NA cars. Because turbos compress air, the low oxygen content of the air doesn't matter that much. The times probably wouldn't change much.
__________________ 1992 Cherry Red Pearl 300zx Twin Turbo @ 15 PSI