by GLHS » Sun Aug 24, 2008 7:31 pm
62/65/14 for 375-425 hp.
62/71/14 for 425-475 hp.
Just my experience from what I have run in the past.
These are for diesel only numbers.
If your 400 hp goal is with nitrous or water meth these turbos might be too laggy.
92 W250 ext cab, 5spd, SPS 62/71/14, ATS 3 piece, Banks 3G intake, Icebox CAI, DDP #4+, timing 1.95 mm, SB 4 puck FE, PDR fuel pin, Hellmann intercooler, Snow water/meth, 60# springs, stock long block, D80 3.54 w/disks, 455+/1005 uncorrected, 13.34@102 7-06; 472 fuel/520 water/meth uncorrected 5-08