reply to any good pull up tips
Chin up tips
Are you doing your chinups to your chest using a medium under hand grip or are you doing your chinups using a wide over hand grip. At my best I could do 15 chinups wide grip to the back of my neck. For inspiration I recall reading the old Muscle Builder/Power magazines with Arnolds article on how he built his lats wider than a jumbo jet. Those lats could fly. Also the old Muscle Builder?Power magazines were real bodybuilding magazines with excellent articles on the champs, Zane, Robby Robinson, Franco, Arnold, to name a few. I wish I could get my hands on some of those issues they were classics. Alot better than this so called Muscle and Fitness. Weider sold himself out for the almighty buck,sure Flex is probably closer to Builder Power but anyway sorry for getting off track.
Back to chinup tips. Experiment with wide versus narrow, and overhand versus underhand. Have you tried using chinup straps these can also help you get in more repetitions.
Another factor to consider is how much you weigh?
If any of this helps send reply.
PS Anyone have any Muscle Builder?power issues for sale from the 1970s ?