Here are some photos of our revised
rear suspension.
Left and above
are photos of the brackets Nate made to attach the rear bar to
the frame.
Here's a shot of the left-hand bracket, bolted to the rectangular frame members above and to the front of the rear suspension. Remember this is an IRS car.
Here's a shot of the left-hand bracket from below and inside.
As you can see, the tabs go on the inside of the frame. We're using a NASCAR bar, which is 37 1/2" long, and just barely reaches outside of the frame on each side, so there's no room to spare for tabs on the outside.
The NASCAR bar is more expensive, but Speedway makes a zillion different NASCAR bars. Designing and building for this dimension gives us plenty of options for choosing just the right bar stiffness for whatever we might need.
The right side arm and drop link.
Nate had to re-route the fuel and brake lines to provide clearance for the bar and arm.
A close-up of the bracket Nate made to allow mounting the rear of the quad shock lower and inboard, to provide clearance for the anti-roll bar arm and drop link.
You can see the mighty Bilstein at the right edge of the photo, behind the arm and quad shock.
Here's a closeup of the arm where it attaches to the bar. Just behind the arm you can see the collar that locates the bar, and the white plastic bushing the bar rides in.
The black anodizing turns brown when you heat it up for bending.
The lower end of the drop link attaches to a 3/8" bolt that runs through the outboard end of the lower control arm, on the back side, just inboard of the spindle bracket.
Here's a view of
the whole drop link and the rear of the arm.
Here's the left side arm and drop link.
Here you can see the drop link sneaking down inside the handbrake cable. It's on its softest position, which gives about 110 lbs of roll resistance at the wheel. The middle position gives Doug's recommended value, 150 lbs.