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The suspension looks really nice painted blue. Really pops against the black frame. I would tie the bottoms of the link brackets together like u mentioned. That's a pretty high stress area.
I had a shop cut me this bracket for my brake conversion just a plain plate with some locator holes that I could drill out and tap.
Well I spent a few hours drilling it and making it perfect to realize I wasted all this time with out noticing that where the holes are for the axel are to hi up!!!!
You can clearly see all the extra meat under the holes.
I'm not sure if I messed it up when I gave them the template or if they messed it up.
I don't think I did it but I Have no prof any more.
The brackets will work but the hole need to come up.
Ill have to see What they say about it but ether way I need new ones.
On the 5th pic down I wanted to put a pipe thro the 4 link mount brackets connecting them to help stiffen it up.
I'm not sure if its needed or not I could still add it but not sure.
I would definitely do that. Also, you need to make sure your frame is boxed around the front 4 link crossmember. Once you get the frame boxed, I would also suggest running gusset tubes from the front side of each front bracket forward the frame at an angle.
I've recently been given some data logs to look at that blew my mind. Basically it was a 4 linked truck (typically runs mid to high 9's turbo deal). The front crossmember for the 4 link brackets was basically an upper and lower tube run across to each frame rail. The frame rails where boxed and it was a very nice solid installation. I did not do any of the fab work, but have been helping the dude get the thing working. I had this crazy idea to put laser movement sensors all over the back of the truck (frame rails, crossmembers, etc). Not really expecting to see anything significant, I was dumbfounded after looking at the logs. Testing was done on a well prepped street (probably hooked better than a typical Friday night at RPR in Houston. These where transbrake launches on around 10 lbs of boost with some timing ramp to keep it planted. Anyway, what we discovered was that the due to the wide span from frame rail to frame rail, the front crossmember was actually flexing quiet a bit for the first 1.0 seconds or so. I have another project I'm doing at the moment so I don't have the room, but in a few weeks I'm going to weld gusset tubes from the crossmember over to the frame to stiffen it up. The goal is trying to get consistency. If it helps 60's that would just be icing on the cake.
That's really interesting blown06.
Did he end up doing all the gussets that your suggesting?
It would be interesting to see the results of doing that.
I can see why its moving, pretty much all the torque ends up on that member.
And like you said its long.
I'm thinking I will do what you suggested.
I did box the frame all the way under the cab and put braces from the brackets to the frame like you said.
So what I need to do is put braces from the main member to the frame. Do you think just putting one set in the front would be enough or do front and back cuz I have room to do both I think.
If you ever have the pleasure of being around a C channel rolling chassis (no bed/cab/engine) try picking up one corner. The amount of flex is incredible. The more boxing and bracing of the frame the better IMO.
You actually want the reinforcement to intersect the bracket where the link mounts to. Look at these examples below. That is where most of the stress is going to be focused.