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Old 02-13-2020, 02:11 PM   #1
SIM GhostrdrZ
 
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Z28 Suspension upgrades

I havenít seen anyone upgrading Z28 suspension. Iíve completely replaced everything on my V6, which definitely needed upgrading. But, I was wondering with all the engineers work if anyone has any luck with Z28 upgrades like solid cradle bushings or such?
Iím obviously not worried about NVH. I know the suspension is all tuned as a great set up. But just got my Z and I have solid bushings sitting around and would think aftermarket trailing or toe arms with solid bearings might improve handling even more or maybe just leave well enough alone.

Thanks
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Old 02-13-2020, 02:31 PM   #2
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The trailing arms and toe arms on the Z28 are rubber coated monoballs vs just rubber on the v6 and SS.
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Old 02-13-2020, 10:42 PM   #3
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I have the Z suspension on my '14 1LE.
Solid cradle bushings on your Z/28 would be a worthwhile upgrade. More so if you track it.
I did UMI Roto-Joint trailing arms (#2516) and Detroit Speed Engineering (DSE) adjustable toe rods (#042302).

The Z/28 has the best OE arms, bushings and joints, some of which the 1LE and ZL1 share. The OE monoballs AKA "rose joint" are similar to a spherical rod end but have a superior sealing system that keeps out water and dirt. It also has OE durability and no noise. Any arm with those rose joints are hard to beat. Yes, most OE arms are not as "strong" as aftermarket arms but the rose joint is superior. I believe any arm that has a rose joint that is replaced with poly bushing is a step down.

The OE trailing arms do not have a rose joint. It has a rubber bushing, and only on one end. The end that mounts to the cradle. But the toe rods do have the rose joint, on both ends. The Z/28 knuckle and upper control arm both have rose joints at various points. The only places the Z has rubber bushings are at one joint on the upper control arm, one joint at the knuckle where the trailing arm mounts and one joint at the lower control arm. And of those 3 joints with the rubber, 2 of them are upgraded solely for the Z/28.

I did the DSE toe rods to make adjusting rear toe easier. I do my own alignments. Those DSE toe rods have the same rose joint (maybe a different size) as the OE toe rods, so there is no loss in smooth articulation.

And I did the UMI trailing arms just to upgrade the OE trailing arm rubber bushing to a monoball/rose joint type of joint for bind free articulation.

The balance of my arms/joints are Z/28 or Z/28 equivalent, which means the 1LE also came with them. I just upgraded my front lower control arm to the Z/28 arm as it does indeed have a stiffer rubber bushing than the 1LE arm.

I would do the solid cradle bushings on your Z/28. But you probably won't notice the UMI trailing arm upgrade. It's a small change in bind reduction/wheel rate.

SIM Z/28? Awesome choice!
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Old 02-14-2020, 01:19 AM   #4
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I have Pfadt rear toe arms but only for the weight savings.

The main thing Z28s need is more camber up front. Otherwise you will destroy front tyres faster. I have Moreno V2 camber plates but there are some other options including Vorschlag.
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Old 02-15-2020, 02:53 PM   #5
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I have installed Detroit Speed Engineering adjustable sway bars front and rear, DSE front end link kit, DSE adjustable rear toe links, DSE adjustable rear trailing arms, DSE adjustable rear lower control arms and DSE rear cradle mount kit, Vorshlag camber plates.

I wanted total adjustability I could do at home or at the track. The build quality of the DSE is nice, the ride quality is more rigid and for me, more enjoyable on track.
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Old 02-18-2020, 05:14 PM   #6
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since I once upon a time did a 55mph 180 degree turn with the DSVV "stock" suspension, no roll, no squeal and came out of it at 60 mph going the opposite direction..with nary a wiggle.... something I've never done that in any other car..either a porsche 911 or my 09 Z06...


I'm at a loss as to why you'd spend loads of money on a suspension, instead of doing a stage 4 engine..as our cars OEM suspension will handle great.
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Old 02-18-2020, 05:40 PM   #7
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Quote:
Originally Posted by The_Raging_Bull View Post
since I once upon a time did a 55mph 180 degree turn with the DSVV "stock" suspension, no roll, no squeal and came out of it at 60 mph going the opposite direction..with nary a wiggle.... something I've never done that in any other car..either a porsche 911 or my 09 Z06...


I'm at a loss as to why you's spend loads of money on a suspension, instead of doing a stage 4 engine..as our cars OEM suspension will handle great.
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