Muscle recruitment percentages data?

I don't understand what you're asking. Maybe you can re-word it for clarity.. and explain why you want the information.

I see too many workout programs but they generalize muscle groups too much for my liking. So,what I would like to see is a visual chart/ list that for example.... Doing a preacher curl recruits %70 of the bicep muscles while the triceps recruit the other %30 for the entire motion... Now do not take my example as literal

Its just a simple example of use of percentages.

There have been some studies done (I forget what the instruments name is) where it actually analyzed which exercises give the best peak contraction for certain muscle groups. For instance, chin-ups (palms facing you) actually had the single best peak contraction in that study meaning chin-ups are actually better for your biceps than curls. You can probably Google it.

Other than that, if you look-up something like assistance work or special exercises and Louie Simmons or Brandon Lily you'll probably find a list of their most recommended assistance work which is a list based on results instead of science. I think if you go to the Juggernaut Training Systems website and sign-up for their newsletter you can download their "manuals" for free and I believe assistance work is listed in there too.

Ha, I found the one for Back and Biceps. When I first read it I threw the table in Excel and was able to sort it; you can probably do the same.

Back and Bi's: http://www.t-nation.com/free_online_article/sports_body_training_performance/inside_the_muscles_best_back_and_biceps_exercises

Chest & Tri's: http://www.t-nation.com/free_online_article/sports_body_training_performance/inside_the_muscles_best_chest_and_triceps_exercises

Shoulders: http://www.t-nation.com/free_online_article/sports_body_training_performance/inside_the_muscles_best_shoulders_and_trap_exercises

Legs: http://www.t-nation.com/testosterone-magazine-623

Abs: http://www.t-nation.com/testosterone-magazine-627

Came to this thread ready to post this links, good work, gotta love the EKG

EMG, not EKG. EKG is for the heart.

This article explains why EMG can be misleading when used to make exercise recommendations:
http://goo.gl/VCkMKL

Unless you're a bodybuilder, it's usually best to focus on training muscle groups and *movements*, rather than worrying about individual muscles.