The 3k springs included in the Pedders, BC, and Megan coilovers leave a lot to be desired in the way of handling. Sure the ride is compliant, but my Eibach/stock strut combo handled better than my coilovers out of the box. The culprit here is the odd spring rates the companies mentioned above provide with their kits(all have the same rates btw). 6k front/3k rear only makes sense if the you want to promote understeer. The higher spring rate in the front diminishes grip. When you go to crank it into a turn, the car continues to go in a straight line instead of following the desired path.
I've found an option that is working well for me so far. I purchased a set of Eibach ERS springs through ground-control.com They are a ground-control spec'd spring with their own p#. They are 6" tall, 2.50" id, and 300lb/in(5.3k). Still not ideal for ultimate handling, but not out of the range of damping control of the shocks. The ride is stiffer, but the handling trade-off is worth it.
Here is the GC spring compaired to the Megan Racing. The Megan one is 7" vs. 6" for the GC.
This length and rate has worked out well in regards to ride height. The car sits at exactly at the same ride height as before with zero adjustment to the coilovers. Even though the Megan springs are an inch taller, their lower spring rate allows them to sag more than the Eibach.
The only downside is that even with the shocks adjusted to the their shortest length, the Eibachs do not touch the threaded perch when the rear suspension is at full droop. What this means is there is a potential for the spring and threaded perch to fall out in the event of the rear wheels not touching the ground. For example jumping a collapsed bridge to get away from the "Law".
To combat this, I came up with a simple solution.
I used a 2.5" hole saw to cut out two 2.5" aluminum circles. I drilled out the pilot holes to 7/16", and got two 3" long 7/16" bolts/nuts/washers to attach everything to the vehicle.
Here are the components on the table.
Put the 7/16" bolt through the hole in the chassis, like this:
Put the threaded collar and aluminum circle over the bolt and install the nut, and tighten.
Here you can see the space between the perch and spring at full droop. Not going anywhere now!
I've found an option that is working well for me so far. I purchased a set of Eibach ERS springs through ground-control.com They are a ground-control spec'd spring with their own p#. They are 6" tall, 2.50" id, and 300lb/in(5.3k). Still not ideal for ultimate handling, but not out of the range of damping control of the shocks. The ride is stiffer, but the handling trade-off is worth it.
Here is the GC spring compaired to the Megan Racing. The Megan one is 7" vs. 6" for the GC.
This length and rate has worked out well in regards to ride height. The car sits at exactly at the same ride height as before with zero adjustment to the coilovers. Even though the Megan springs are an inch taller, their lower spring rate allows them to sag more than the Eibach.
The only downside is that even with the shocks adjusted to the their shortest length, the Eibachs do not touch the threaded perch when the rear suspension is at full droop. What this means is there is a potential for the spring and threaded perch to fall out in the event of the rear wheels not touching the ground. For example jumping a collapsed bridge to get away from the "Law".
To combat this, I came up with a simple solution.
I used a 2.5" hole saw to cut out two 2.5" aluminum circles. I drilled out the pilot holes to 7/16", and got two 3" long 7/16" bolts/nuts/washers to attach everything to the vehicle.
Here are the components on the table.
Put the 7/16" bolt through the hole in the chassis, like this:
Put the threaded collar and aluminum circle over the bolt and install the nut, and tighten.
Here you can see the space between the perch and spring at full droop. Not going anywhere now!
Last edited:
