Can flexing to much with not enough bump stop ultimently damage your springs or what is wrong with not using bumpstops because im thinking about making mine shorter

 

yes. failure to use proper bumpstops for the coils you are using can lead to the over compression of them.
having said that, some manufacturers purposefully use taller bumpstops to help prevent rubbing of fenders at a full flex. in those cases, you can make them shorter without any ill effect.

 

so how short is to short to which can cause damage

 

man, it really depends on the coils you have. i see that you have a TF 3" setup and i wouldn't run anything less than 2" of bump stops.

 

so you think the ones that come with it are about the best thing

 

not necessarily. did you get the extensions that go on top or the ones that get mounted to the axle. i'm not a big fan of the ones that go on top but the ones that bolt up to the axle is what you want. of course, if you have both (as i know the 4" kits come with both), i would ditch the upper one.

 

they all go into the top

 

You know......I always used to say if I could get my index finger to the knuckle between the coils at full stuff, that was right on the mark. Not very objective......but it always worked for me.

 

okay - i'm not real fond of those as they can get hung up in the coils at a full droop but, they do work and i wouldn't chop down your factory jounce just to gain more stuff.

 

not the most scientific way of determining too much compression but yeah, going solid is not typically a good thing when it comes to coils.