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Ask A Pro \  equal length irs

equal length irs

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replies 11
following 12
 
rizz0   +1y
what would be the handling characteristics of an ind rear setup (thunderbird spindles and third member) with the all the arms equal in length would the lack of neg camber be as harsh on the rear as it is in the front suspension while going into corners considering that solid axles dont have the neg camber
unusualfabrication   +1y
Good question, seems like it would be similar to a solid axle in the rear.
STATUSPITS   +1y
I would think you would need some camber so the axles dont get pulled out at full drop or lift?
Or you can make the arms the same lenght as the shafts maybe?

standardbyker88   +1y
ive wondered this too. depending how short the arms are, the fact the track width changes could be a factor. short arms means the track width would have more change in a given amount of travel. in that way though, i would set them as close to the length of the shafts as possible to keep all three angles as close as possible. why would you not want rear camber? it looks awesome and is helpful if kept minimal.
bigjon   +1y
isn't this the point of independent rear end so the camber so you can tuck easier?
standardbyker88   +1y
that and the pumpkin part being lower, so you can clear the bedfloor or backseat
thacru78   +1y
You also have to consider tire scrub. Without any camber change there will be alotta wear on the tires. There's alotta reasons for camber change...both for handling and alignment purposes.
flatblack92   +1y
a solid axle keeps the tires flat on the ground. with an equal length irs the wheels would not camber at all and would stay parallel the the body of the truck always. as soon as the truck starts to lean the wheels will lean too and you will have less traction the farther it leans.
e10pvmt   +1y
you need camber to keep the as much of the contact patch of the tire as possible, in contact with the ground during cornering.....plu you may run into some binding issues with your cv axles
standardbyker88   +1y
yeah. if the tires are basically getting closer and farther apart in travel they will scrub side to side more. solid axles dont have camber, but have a set width as well. im still unsure why youd set it up like this.