I was referring to the concern that has been stated about the strength of the DJM LCA. If it holds up the weight of the truck with a torsion bar, I see no reason it wouldn't hold up with a coilover. The mount is another story, but the arm itself should be more than capable of supporting the weight. Like Tim said, you're moving the support further away from the pivot of the arm lowering the stress placed on the arm.
As for coil bind, I measured the amount of compression we have on our race truck at ride height with about 3700 or so lbs on the front axle. I posted it earlier in this thread, but the compression on the shock/spring with the preload backed all the way out is 2.75". I have no idea how much travel you have before you reach coil bind though. With our spring/shock combo, I would think the shock would bottom out before the spring did. I think we are running a slightly shorter shock than most.
Yes i understand that if it can hold a torsion bar, it SHOULD hold a coilover but you have forces acting in a different way as well as variables and real world scenarios that dont always follow the math. While a torsion bar is inside a hexigon, it can distribute its load via all 6 points and flat sides down into the tube its self trying to twist that whole tube down. in theory, its stronger as your using the tube and distributing the load through the tube. dunno if that makes sense. Adding a coilover half way down the arm and putting the mounts on top of the tube now puts you in a bending situation where more bracing/structure should be added. if you look at how they built the arm, its structure is there for a torsion bar, no so much a coilover.
im trying to think of an analogy to go with this but cant really think of any. Sucks cause it all makes sense in my head but i have a hard time putting it to text.
Im not against the arm IF DJM built the arm out of some heavy material and didnt cheap out.
For coil bind, josh if you grab the info on the coil from where you bought it, it should give you the fully compressed height numbers. Its called the block height. as long as you shock fully compressed with where the spring is now does not let the coil reach that measurement within the suspension cycle, your good to go. Running the math in my head on those 4" stroke coilovers and 12" long coil, you should be fine. even on a 10" coil.
the problem with a leveled truck is the shock length. the 4" stroke qa1's are too short for that so that means you need to bump the shock length up and if you like to use all your suspension travel, you gotta keep a better eye on it. I know we are talking drag racing here but i like to veiw it from all spectrums.
John, different length coils are not really gunna change anything for ride height, only coil support weight will. you can put a 1000* 10" long spring on a 4" stroke shock and it will still compress just as much as a 1000* 12" long spring on a 4" stroke shock. one will just be higher on the preload adjuster than the other. unless i read that post wrong
anyone wanna buy my traxxas slash so i can invest in putting my coilovers together and bottom a-arm bracket? lol
:hug:
