Glen's budget rebuild

[93tonkatoy]

  Not looking like it.

[79coyotefrg]

well

[79coyotefrg]

bumpsteer ??

i thought  with histeer  you didnt get bumpsteer

maybe its just  takes getting used to  but it seems, or feels  much different than the stock steering did

alot more "feed back" from the steering when i hit a bump

[unclejpl4x4]

stop bumping the steering your gona spill my

[BoG-ToY]

I get bumpsteer with my hi steer, I think it has to do with the stabilyzer or something...I think that how toyota had it originally... from the housing to the tie rod....is the way to go...or BOTH one from fram to drag and one from housing to tie.... ALSO make sure all your shackle bolts are nice and tight....  same thing with the hanger bolts

[79coyotefrg]

i dont have a stabilizer at all,  so thats probably what i need to do to smooch it out some

[BoG-ToY]

mines only bad when I hit a good bump now.... course when my shackles were loose....i got deathwobble....litarally. you could see where the stearing stops had been hammered on both sides....lock to lock, whole truck shook side to side and the stopping power it had was crazy.... slowed me down to a stop almst instantly....
SO moral is... make sure suspension is good and tight too..... that could be part of your bump steer problems

[THK Matt]

whats the defination of Bump Steer, just curious...
i dont have a solid axle yet.

[DTB]

whats the defination of Bump Steer, just curious...
i dont have a solid axle yet.

From Wiki: Bump Steer is the term for the tendency of a wheel to steer as it moves upwards into jounce. It is typically measured in degrees per metre or degrees per foot.

On modern cars the front of the tire moves outwards, as the suspension is raised, a process known as the front wheels "toeing out". This gives roll understeer. The rear suspension is usually set up to minimise bump steer, where possible.

A typical value is two degrees per metre, or perhaps more, for the front wheels.

Excessive bump steer increases tire wear and makes the vehicle more difficult to handle on rough roads.

Solid axles generally have zero bump steer, but still have roll steer, in most cases. That is, if the wheels move upwards by the same amount, they tend not to steer.

Roll steer is an important part of the budget used to define a vehicle's understeer, known as a Bundorf analysis.
Difference between Bump Steer and Roll Steer
In a bump steer, both wheels rise together. In roll steer, one wheel rises as the other falls. Typically this produces more "toe in" on one wheel, and more "toe out" on the other, thus producing a steering effect. In a simple analysis you can just assume that the roll steer is the same as bump steer, but in practice things like the sway bar geometry have an effect that modifies it.

Roll steer is usually measured in degrees of toe per degree of roll, but can also be measured in degrees of toe per metre of wheel travel.


Method of Adjustment
The linearity of the bump steer curve is important. If it is not straight then the length of the tie rod needs to be adjusted.

Bump steer can be made more toe out in jounce by lifting the rack or dropping the outer tie rod, if the rack is in front of the axle. The reverse applies if the rack is behind the axle. Usually only small adjustments (say 3mm) are required.

[THK Matt]

thank you!

[Jordan7118]

I found your truck's evil twin brother 

http://littlerock.craigslist.org/cto/814450392.html

[THK Matt]

thats funny and mean

[Jordan7118]

thats funny and mean

Not mean, really just funny. Mainly it's just that they're blue and a 1st gen 

[THK Matt]

haha yes

[79coyotefrg]

OMG  the loser couldnt even find some damn springs 

[DTB]

I found your truck's evil twin brother 

http://littlerock.craigslist.org/cto/814450392.html

[Jordan7118]

Hey, shut up! I'm on my way to pick it up right now! This thing is a STEAL!!!!!!! I'll be jumpin' rice burners in no time!!!!!!   

[Rocksurfer]

That Grand Nat. engine is worth more $ that what he's asking, if it is a true Grand Nat. engine they put some turbo'ed Regals out too.

[mudmaster]

44's on 1/2 tons??

[THK Matt]

Hey, shut up! I'm on my way to pick it up right now! This thing is a STEAL!!!!!!! I'll be jumpin' rice burners in no time!!!!!!  

for real?

[79coyotefrg]

  the bumper is here

[V-Man]

ok glen that's great but remember...

[79coyotefrg]

[Jordan7118]

for real?

HELL NO!!!

[unclejpl4x4]

ya glen we want pics of your bumper 

[79coyotefrg]

later today maybe, i got to "modify" my mount

[BoG-ToY]

I dont care WHAT wiki says... IF your "drag link" (yes I know its no longer a drag link as it moves side to side rather then front to back BUT since it does the same job of attaching the PITMAN ARM to the STEERING ARM I am calling it a DRAG LINK) anyways
If your drag link is at any kind of an angle other then the same as the "tie rod" when your axle moves closer to your frame and attached pitman arm, it shortens the distance between the pitman arm and the steering arm,(ok I guess if your pitman arm was lower then your steering arm it would lengthen the distance, or if you hit a divet the pulled the axle AWAY FROM the pitman arm it would still have the same affect as changing the distance)
the MORE angle you have on your "drag link" the more that distance change would be.
Maybe this isnt "bump steer"   BUT when you hit a bump it tends to pull on the steering wheel or pull the truck slightly to the side....typically on our trucks... left hand drive and our typical cross over steering... if you were to hit say a speed bumper your truck would steer slightly to the right or your steering wheel would move slightly to the left.  which is what WE AS WHEELERS consider bumpsteer.... NOW IFS trucks ...BECUASE OF THERE STEERING  shouldnt have ANY bump steer or other steering issues....although the TRACK of the front axle changes when the suspension compresses or relaxes...the steering relay rods follow suite and since they are on the same travel arch....all of the steering stays the same..... thats why on a normal not  bracket lifted truck, if you crank the torion bars.... it shouldnt change the alignment
As far as SFA trucks with any CROSSOVER steering, meaning NOT push pull, when you have the problem listed above, when the distance is shortend it steers the car to the right... if your springs hardware is sloppy the AXLE can actually move to the right without the truck... which then pulls on the "drag link" rapidly steering the truck to the left, once again....loose shackle or spring eye bolts would allow the procedure to start over...only this time... the body of the truck was moving towards the right therefore increasing the change in distance more, which in MY CASE actually created a death wobble, each "cycle"  the axle moving without the truck increased in strenth untill it was steering stop to steering stop.... and at a very high frequency.....
AS FAR AS PREVENTING the slight pull to the left of the wheel or pull to the right of the truck.... the closer your pitman arms angle is to your tie rod arms angle is the better. wow...enough said... LOL   On a side note... the LONGER the DRAG LINK is  the better as well, kinda like a long-arm four link.... it means more travel with less change in angle.
for those of us who DONT work on CUSTOM JUNK   compare a spacer lifted VW bugs camber.... it lookws like  a V with too much lift... BUT the FORD TTB WITH LONGER A-ARMS(yes I know they aint a-arms but the do the same job) would have ALOT less of a camber problem.... same thing with ALL suspension parts....
BLAH BLAH, GUYS I have ADHD and for some reason if its MECHANICAL my brain has the ability to tear it into the smallest yet largest bits of information.
I live in floridas panhandle, so we are seeing alot of storm activity, SO I was joking with the lady at autozone, she said shes changed alot of batteries today cuz they've been going out... I made her take a double take at what I said:
"IF the barometric pressure has increased, its kind like throwing a mini turbo on your vehicle, the more dense the air is that enters the chamber of your engine, the more it takes to compress it therefore the higher the load is placed on the starter and then the battery which could in turn, overload a weak battery"
she looked at me and said " as weird as that sounds, it makes perfect sense"

over complication of what could just be a random act of battery failure

[BoG-ToY]

BTW GLEN AND OTHERS

SORRY FOR HIJACKING THE THREAD IN A SORT.... but... I really didnt like WIKIs answer for bumpsteer as it really isnt the same bumpsteer that we talk about here.... and then the IFS thing becuase the upper control arm, lower control arm and steering relay rod all move on the same plane so they have no steering issues either

[79coyotefrg]

[Jordan7118]

WOOOOOOOOOOWWWWWWWWW

Lay off the coffee, dude.   

I think that you wrote a lot and said very little. Maybe you should try again and go for the K.I.S.S. approach - less is more.

Sorry this is in your thread, Glen 

BillyBob, I'm sure you had good intentions