Lets See Those Custom Parts v.2023
#541
EvoM Guru
iTrader: (2)
In the loading direction, especially once you get enough curve for tire clearance, I would have the clearance pockets in the other directions. My plan is to keep the design language similar to my front control arms with the stepped pass thru design for draining out the dirt and water.
I still need to add a small post for a threaded hole as I intend to keep the ebrake cable mounting hole.
#543
The biggest thing I was unsure of was how they'd be loaded. I was really only thinking of impact loads from rapid wheel motion like when hitting a pothole or going over curbing. It's not hard to flip the pockets, neither would creating drain holes. If I do that I'd probably taper the pocket into the drain hole.
I still need to add a small post for a threaded hole as I intend to keep the ebrake cable mounting hole.
I still need to add a small post for a threaded hole as I intend to keep the ebrake cable mounting hole.
Typically its been the ball joints and tie rods that have been my go-to for exceeding their failure loads.
I do have a set for Mychailo of the 1.25" getting anodized right now but he also wants some other plates to get anodized at the same time. Might be able to convince him I'll just make him a new set of bodies to go with the other plates and I have all the rest of the parts getting done for an extra set anyways.
If youre really interested I can try and make that happen, uprights should be done at anodizing towards end of next week.
#545
Certainly there are geometry things to fix. That trailing arm angle effects squat on acceleration, with the lower car making less squat to a point where you can actually get lift. I need to start modeling the rear geometry to see where we can improve things. Certainly resetting camber curves, correcting the trailing arm angle, and fixing bump steer is where Im starting.
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Ayoustin (Feb 8, 2018)
#546
EvoM Guru
iTrader: (2)
Messed around with it a bit more. I did give it some more curvature and kind of see what you mean about the load.
In regards to the offset, would you say a level trailing arm is desirable or is that moreso dependent on the rest of the suspension setup?
In regards to the offset, would you say a level trailing arm is desirable or is that moreso dependent on the rest of the suspension setup?
Last edited by Ayoustin; Feb 8, 2018 at 04:45 PM.
#547
Evolved Member
if you are doing a custom arm, use the opportunity to upgrade to spherical joints on both ends..
#549
EvoM Guru
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My plan was to retain the ball joint on the one end and make it accept a poly bushing on the forward end. If there's a decent benefit to putting a spherical in the front then I could do that pretty easily. I don't really see how a spherical would be an upgrade because it wouldn't resist any torsional load put through the arm.
#551
EvoM Guru
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Haha I was hoping you'd get crazy with it. I'm thinking of making the one I'm working on a universal drop in piece so it works on either side of the car and drops into the car with the ability to keep the rest of the suspension arms factory/aftermarket replacements so the more average guys have an intermediate option.
#552
Evolved Member
yes you are right, I wasnt clear.. On mine I pressed in a spherical on the chassis side, but kept the two side rubber donuts.. those keep it aligned so that it doesnt sag..
#553
EvoM Guru
iTrader: (1)
Offsetting where the arm attaches to the pivot point does nothing to change geometry. You have to change the location of the pivot. Similar to the front end, you would use an extended ball joint or custom knuckle.
#554
EvoM Guru
iTrader: (2)
Here's where I left off last night. Rounded out the pockets, added in drainage holes, and added the small post for the ebrake cable. The ebrake post is on both sides of the arm, so it can be used on either side of the car.