Hello i've been searching for answers for the last few days about this but to no avail i have a 92 4runner with a 4in ifs lift i got to looking at i the other day and the bump stops seem to be very long i just want to know if and how much i can shorten them for a bit more flex my axles are not at an angle while stationary so i don't see why they wouldn't be able to go up a bit higher anyways here are the pics sorry for quality and lack of punctuation

http://i913.photobucket.com/albums/a...ps91e3c218.jpg

http://s913.photobucket.com/user/ben...fe1fb.jpg.html

 

Low profile bump stops.

Sent from my iPhone using YotaTech

 

yeah i have seen them around i just want to make sure its ok for the axle to flex up a bit higher before i buy new ones or cut those down

 

The best thing is low profile bump stops, as Stew said.

You could always take the bump stop extentions off Check out post #10 in this thread: https://www.yotatech.com/forums/f199...-build-223588/

 

You could always take the bump stop extentions off Check out post #10 in this thread: https://www.yotatech.com/forums/f199...-build-223588/[/QUOTE]

i appreciate the link i searched for days for something with some info but i just couldn't find anything i knew it was in here somewhere tho thank you both

do you happen to know where i could find a cheap set off the top of your heads?

 

http://www.energysuspensionparts.com/
http://www.prothanesuspensionparts.com/

 

ok great i appreciate it guys

 

The bump stops are not long, Your torsion bars are set low, Your lower control arms should be angle downward leaving about 1/4"-3/8" from the upper bump stop.
You are not using 1/3rd of your articulation.

 

hmm i will do a little research into that but i don't understand what you mean by (leaving about 1/4''-3/8'' from the upper bump stop) they are already about 3 inches away and if i tighten the torsion bars then that would make them farther away not being a rude just want to make sure i understand what you mean

edit: i realize that you said upper bump stops while i was thinking lower just now so i know what you meant but i don't think tighter torsion bars will help with articulation

 

Even I can't hardly make sense of what he's saying there. And I kinda know a thing or 2 about IFS. I think he's saying that you would want to have the t-bars cranked until the upper control arms are ¼"-⅜" from touching the upper bumpstops. Which pretty much makes no sense in the context of this thread, or most other contexts frankly. Because we can't see how far away from them they already are. All we can see is the lower control arm, and the lower bumpstop. Not only that, but cranking the torsion bars will only make it harder to use the entire range of articulation. Especially uptravel/compression. And will not provide any ability to use any more, much less 1/3 more. You'll gain +0" uptravel/compression and +0" downtravel/extension. Though it will appear as though you have less downtravel/extension and more uptravel/compression. But neither will have actually changed. Since the upper and lower bumpstops are still limiting the amount of travel in either direction the exact same amount as they were before.

But whatever he's trying to say, you can go ahead and disregard it. If it's giving you half as bad a headache to understand as it is for me to try and explain, that's more than uncalled for. And really only adds confusion to something that's not that difficult to ascertain.

 

thanks mudhippy i agree i read earlier that relieving the t bars would help with articulation so i was a bit confused on a side note i just went looking for my upper bump stops and it would seem that i don't have any installed i will check again when it stops raining but i'm pretty sure i just saw the mounting holes for them lol but i will be ordering low profile upper and lowers when i get the chance i appreciate all the help loving this website so far.

 

Tightening the torsion bars does not make the suspension harder unless you already against the upper bump stops, Only putting heavy duty torsion bars make it stiffer.
Yes, The more the control arm travels up the tension does increase but that is the same with all suspensions.

By the pictures It looks like the lower control arm and the axel are level and should be at a more downward angle (picture could be miss leading).
I have the same drop kit and the extensions on the lower bump stops keep the CVJ from binding at excessive angles.

And MudHippy,, Yeah,,, nevermind.

 

What is that? Some kind of veiled insult? Maybe I'm supposed to read between the lines or something? Well, whatever it is, I'm not seeing it. Nor does it bother me in any way.
Are you saying that just to frustrate me? Or is that what you really believe? If the former, then congratulations! Now I'm officially irritated.
If the latter, you are just dead wrong. Either way, you need schooled. So here goes...

For one thing, being against the bumpstops has nothing to do with it. For another thing, the angle(or rather the effective length) of the upper control arms also determines how hard/stiff the suspension is. You obviously need to relearn some torsion bar suspension basics.

Here, read this for starters.
http://www.sdori.com/SDORI_Theory_Of_Operation.html

 

mudhippy ftw.

Also with the torsion bars cranked up all the way, you loose drop in the suspension, which is something that is a must for offroading.

 

I second this!

 

I already know this info, What I am saying is that he is above what would be the correct or normal starting angle, This is what I thought by the first viewing of the images he posted. And stated in my second responds that I interpreted it wrong.

As the article states when you do one thing you sacrifice the other, This works both ways, But this also goes with changing the max angle of the control arm and reaching the max angle of the CVJ, And the bump stops are suppose to prevent that from happening.

Now.
MudHippy may know the Toy IFS tolerance and limits, Even better - may know a better start point in adjustments making it better for the type of offroad you do.

Kudos.