Vic_Ferrari New Member Sep 25, 2003 273 1 0 lake mary, FL Mar 4, 2004 #21 Mar 4, 2004 #21 birch.....which pulley? a 2.8 upper with correct tuning will make 440ish on a superflow dyno on an otherwise stock 03. I say 440ish becuase I've seen as low as 425 and as high as 450. Dynojet numbers are a different story.......It may make 460 on a dynojet.
birch.....which pulley? a 2.8 upper with correct tuning will make 440ish on a superflow dyno on an otherwise stock 03. I say 440ish becuase I've seen as low as 425 and as high as 450. Dynojet numbers are a different story.......It may make 460 on a dynojet.