Lumpy Idle / Power question...

[darrenjlobb]

Hey guys... saw this video ealier.. and was wondering how he seems to have a lopey idle? What causes that, and damn that thing looks pretty powerfull! Anyone know what this thing has done to it?

http://www.youtube.com/watch?v=yPJ_tVgE-bw&feature=related

Would love to know what pump / timnig mods hes done to make it lope like that at idle..