Lowered Z28~

[richard grimsley]

I just picked up a “15 Z28 and was looking into upgrade potentials. Has anyone placed lowering springs on their Z?
If so, pictures and or dropped by how much?

[pat_t]

Seen a few lowered slightly on proper expensive race coilovers.

Not seen any dropped on springs on the Multimatic DSSV Dampers. Probably because unless you had a set of Z/28-spec springs custom wound it would be a handling downgrade!

I'm looking into a way of lowering mine a few mm at the front, but it means modifying the strut, so it won't be for everyone!

[Smokin19]

With a 3" exhaust on mine I don't think I could possibly be any lower without hitting everything on the road.

[cdb95z28]

A member here on the forums, aris, has installed the Detroit Speed Kit 1 on his Z/28. Search for him, he has some info within some posts. I have the Z suspension on my ‘14 1LE and I use 19” wheels for the track. I wish I could lower it and not lose any performance. I actually ran a set of BMR 1” drop springs with the DSSVs 2 years ago. I believe it was a step down, but I did not have the optimum anti roll bar package either. Plus, my track skills have got a lot better since them. A few vendors have sworn the DSE Speed Kit 1 is a great setup on the Z, but I need more proof of the track performance.

[cdb95z28]

Also, the DSSVs have less compression travel (and rebound travel). So reducing travel with drop springs will mean the car is on the bumpstops more. There are many dynamic factors here.

[aris]

Originally Posted by cdb95z28

Also, the DSSVs have less compression travel (and rebound travel). So reducing travel with drop springs will mean the car is on the bumpstops more. There are many dynamic factors here.

cdb is correct that I have installed the DSE speed 1 kit on my car. The kit lowers the car just under an inch all around (I think .75"s). I'm also running moreno camber plates.



I've never felt the car bottom out on the bump stops on the track, but its entirely possible that it could occur on a bumpy road. Hasn't been an issue for me.

It's bizarre to me how controversial running different spring and sway bar rates is, but to each his own. It's an afternoon of work to go back and forth between different springs and sway bars.

There are obviously many factors at play, including improvements in my own skill level, but I experienced a net improvement in performance (based on average lap times at Thunderhill's 3 mile course) between the car stock and the car modified with the speed 1 kit and the camber plates. I found the car was a little more predictable and that turn in greatly improved (probably mostly due to the camber plates).

We'll see how long I leave the suspension as is. I like experimenting with different setups, so it's more than likely that I'll eventually switch to something else.

[D2M]

Lowered slightly over 1 in.

[69L48Z27]

Originally Posted by D2M

Lowered slightly over 1 in.

How was it lowered?

[D2M]

Originally Posted by 69L48Z27

How was it lowered?

My car is retired from track duty. I installed Pedders Supercar coilovers with my existing Moreno camber plates as they do not require drilling the rear floor for dampening adjustment access and are the adjustment knobs are easy to get to..

[OneBadZ/28]

Originally Posted by D2M

Lowered slightly over 1 in.

Dude that looks great! I have a hard enough time managing mine at stock height but DAMN that looks good-strong work........

[1970judge]

Originally Posted by aris

cdb is correct that I have installed the DSE speed 1 kit on my car. The kit lowers the car just under an inch all around (I think .75"s). I'm also running moreno camber plates.



I've never felt the car bottom out on the bump stops on the track, but its entirely possible that it could occur on a bumpy road. Hasn't been an issue for me.

It's bizarre to me how controversial running different spring and sway bar rates is, but to each his own. It's an afternoon of work to go back and forth between different springs and sway bars.

There are obviously many factors at play, including improvements in my own skill level, but I experienced a net improvement in performance (based on average lap times at Thunderhill's 3 mile course) between the car stock and the car modified with the speed 1 kit and the camber plates. I found the car was a little more predictable and that turn in greatly improved (probably mostly due to the camber plates).

We'll see how long I leave the suspension as is. I like experimenting with different setups, so it's more than likely that I'll eventually switch to something else.

You have my attention... Is Moreno still making the plates? Also, just to verify what kit # did you buy? I was just looking at their kit window shopping. This one? 033021 https://www.detroitspeed.com/2010-20...up#tab-reviews

[Spyglass]

D2M, Your car is straight up fire. Love the stance.

[Jeff71]

Originally Posted by 1970judge

You have my attention... Is Moreno still making the plates? Also, just to verify what kit # did you buy? I was just looking at their kit window shopping. This one? 033021 https://www.detroitspeed.com/2010-20...up#tab-reviews

Gen5diy is supposed to be offering remakes of the Moreno units, see here:
https://www.camaro5.com/forums/showthread.php?t=526292

Also, it looks like the DSE speed kit PN: 033023 would be the one for 14-15 Z/28's, however, aris could have used one of the others I suppose.

[aris]

Originally Posted by Jeff71

Gen5diy is supposed to be offering remakes of the Moreno units, see here:
https://www.camaro5.com/forums/showthread.php?t=526292

Also, it looks like the DSE speed kit PN: 033023 would be the one for 14-15 Z/28's, however, aris could have used one of the others I suppose.

Nope, you're right - the correct kit is 033023

https://www.detroitspeed.com/2010-20...up#tab-reviews

Spring rates are similar to stock Z/28, but the sway bars are much larger/heavier duty. I also upgraded the sway bar bushings and brackets that came with the speed 1 kit with delrin bushings and billet brackets.