persnonally don't think the split is gonna do anything!! what is your routine like, ie what exercises are you doing for tris??
I find weighted dips to be the best tris workout, that and overhead tricep extensions with a dumbell leaning back on the incline, (usually standing) so the weight doesn't bang against the bench, I'll warm up with 60's and then work my way up in ten lb incriments to 110 (the highest my gym has) and then work my way back down... then some burnout cable extensions but that is more than probably just over-kill as they are already fried by then!! there's a ton a various tricep routines bt I've found the first 2 to be the best I've found so far!! the main thing is to find a couple tricep exercises you like and then hit them like a madman!!