Torsion keys
#1
Torsion keys
I just ordered these 3 inch torsion keys, do they look ok? i dont want to get them and not have them fit.
http://wheelsnparts.com/index.php?ma...&products_id=9
http://wheelsnparts.com/index.php?ma...&products_id=9
#2
I just ordered these 3 inch torsion keys, do they look ok? i dont want to get them and not have them fit.
http://wheelsnparts.com/index.php?ma...&products_id=9
http://wheelsnparts.com/index.php?ma...&products_id=9
#4
from what i've read you can only get 2 inches out of the torsion bars and just cranking them up with a wrench does the same thing as the keys...i forget if the thread about it was on here or somewhere else but you may wanna try searching for that and get your money back because i'm pretty sure your not gonna get 3 inches it even says 1-3 at the bottom you'll prob get 1-2 which you could get my just cranking them
#5
#6
#7
Well i put the 3inch tortion keys in, and my blocks, Well my question is i turned my new keys all the way up and it rode a little rough and the front end only banged when i hit big bumps. But now all assuded it bangs when it hits every bump evan creveses in the road does anyone no why that might be? Do i need new front shocks?
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#8
Heres the deal with torsion bar lifts...
A torsion bar is literally a solid bar of spring steel. When you turn those keys (which are basically a cam), you are putting an increasingly higher preload on the spring that raises its spring constant (k).... F=ks This is a similar action to adding leaf springs to the pack of leafs in the back or adding coils to a specific length coil spring. It is a stiffer ride now because there is a higher spring constant, but that higher spring constant is what allows it to handle the greater force required to hold the front of your truck up higher.
The only thing "lift keys" do is puts a higher inital preload on the bar so that it can be turned tighter, but the spring constant required to keep the truck at a specific height is the same regardless of which key you use, there will just be less turns in the bolt with the lift keys at that height.
This is what makes cranking the torsion bars the "cheap" way to lift the front of your truck. It throws off the factory spring rating and therefore you won't get that same factory ride quality. The real way to lift IFS is to drop the lower control arms and use taller knuckles, cause they will keep your factory spring rating, but those lift kits cost around $2000 or so.
A torsion bar is literally a solid bar of spring steel. When you turn those keys (which are basically a cam), you are putting an increasingly higher preload on the spring that raises its spring constant (k).... F=ks This is a similar action to adding leaf springs to the pack of leafs in the back or adding coils to a specific length coil spring. It is a stiffer ride now because there is a higher spring constant, but that higher spring constant is what allows it to handle the greater force required to hold the front of your truck up higher.
The only thing "lift keys" do is puts a higher inital preload on the bar so that it can be turned tighter, but the spring constant required to keep the truck at a specific height is the same regardless of which key you use, there will just be less turns in the bolt with the lift keys at that height.
This is what makes cranking the torsion bars the "cheap" way to lift the front of your truck. It throws off the factory spring rating and therefore you won't get that same factory ride quality. The real way to lift IFS is to drop the lower control arms and use taller knuckles, cause they will keep your factory spring rating, but those lift kits cost around $2000 or so.
Last edited by 95_318SLT; 04-12-2009 at 11:00 PM.
#9
Right i understand that 95_318slt, But when i first turned my new keys all the way up the front end of the truck would only bang if i hit big bumps, But now the front end bangs evan if i hit a little crack in the road does anyone no why that might happen all of a sudden? Maybe new shocks would help?
#10
Oh, sorry, I misread your last post. It's hard to say exactly whats causing it. It could be the shocks, or I could see where the ball joints might be going bad. You should also check your tire pressure.
The easiest way to look at it is to jack it up and rest it on the crossmember, and then take your jack and slowly and very slightly jack up each front wheel and look for any slack where there shouldn't be slack.
The easiest way to look at it is to jack it up and rest it on the crossmember, and then take your jack and slowly and very slightly jack up each front wheel and look for any slack where there shouldn't be slack.
Last edited by 95_318SLT; 04-13-2009 at 12:25 PM.