07-05-2019, 02:17 PM | #1 |
Drives: 18 Black ZL1-1LE Join Date: Jun 2017
Location: Kennesaw, Ga
Posts: 201
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Softer rear spring on 18 ZL1-1LE
Guys has anyone changed or researched a softer spring for the rear of the ZLE . I think that it is sprung a bit hard in the rear and with a softer rear spring might not pogo over rough tracks. I also think it might improve traction out of corners with a little more squat to the rear. Thoughts ? I do not want to upset the balance of the car but it seems just sprung heavier than needed in the rear the front feels about perfect to me .
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07-05-2019, 10:05 PM | #2 |
Drives: 19' ZL1 1LE Join Date: Nov 2015
Location: Houston,Tx
Posts: 128
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The softer rear spring will more than likely induce more understeer. It's surprising to me that you're lacking rear grip. I run with all the nannies turned off and I am blown away by how this car puts the power down.
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07-06-2019, 08:48 AM | #3 |
Drives: gas powered Join Date: Jan 2019
Location: TN
Posts: 315
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I think hes talking when the car hits a single big bump the rear seams to pogo stick like he said.
It can be an eye opener on a normal highway. The exit ramp to my work has one big undualtion that even at 70 my head hits the ceiling with my seatbelt on. I dont think I would want to hit it at 100. |
07-06-2019, 01:57 PM | #4 | |
Drives: 19' ZL1 1LE Join Date: Nov 2015
Location: Houston,Tx
Posts: 128
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Quote:
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07-06-2019, 04:52 PM | #5 | |
Drives: 22' Porsche PDK GT4 Join Date: Mar 2018
Location: Bay Area
Posts: 2,013
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Quote:
The faster you go, the better they should be, that is the whole purpose of a racing derived shock. My previous M3 on Ohlin R/T coilovers was similar. Rather harsh on big bumps on the freeway, but anytime I pushed it hard into triple digit speeds it felt even more composed. It's the whole reason for their existence, to excel at track speeds and keep the car stable.
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Current:
22' Porsche PDK GT4 (MCS 2-way remote dampers) Previous: 18' NFG 2SS 1LE (ZL1 1LE solid rear cradle bushings & Corsa Exhaust) 16' F80 M3 (Ohlin R/T Coilovers) 13' Audi TTRS (APR Stage 1, MSS Springs) 09' C6 Z06 08' E90 M3 06' 335i (KW V2 Coilovers) 03' C5 Z06 |
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07-06-2019, 04:53 PM | #6 | |
Drives: 18 Black ZL1-1LE Join Date: Jun 2017
Location: Kennesaw, Ga
Posts: 201
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Quote:
I think the back can skate and perhaps a softer rear might be helpful and also allow a bit more weight transfer to help off corner traction. Thanks for the input guys |
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07-07-2019, 06:47 AM | #7 |
corner barstool sitter
Drives: 08 Mustang GT, 19 WRX Join Date: Jul 2012
Location: Eastern Time Zone
Posts: 6,990
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A softer rear won't increase "weight transfer" . . . if anything it'll reduce it a little because allowing the rear to drop further under acceleration works to lower the car's (sprung mass) CG relative to where it ends up with stiffer rear springs. Nose rise remains about the same, so you're not getting any compensating effect there.
What you're best off hoping for is that having more rear compliance eases the shock of hitting sharp little bumps and losing traction that way. Think in terms of "controlled give" and "losing less traction" here. Norm
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'08 GT coupe 5M (the occasional track toy)
'19 WRX 6M (the family sedan . . . seriously) |
07-07-2019, 07:52 AM | #8 |
Drives: 2021 Crush ZL1 1LE Join Date: Oct 2009
Location: Sierra Vista, AZ
Posts: 1,119
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Just a thought from a novice - have you tried to adjust the sway bar?
Never felt an issue with my ZL1 1LE. The rebound damping is phenomenal. Car just sticks to the road.
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2021 Crush ZL1 1LE |
07-07-2019, 01:20 PM | #9 | |
Drives: 18 Black ZL1-1LE Join Date: Jun 2017
Location: Kennesaw, Ga
Posts: 201
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Quote:
Maybe it’s at the best compromise now ? |
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08-06-2019, 10:15 PM | #10 |
Drives: truck Join Date: Oct 2010
Location: cali
Posts: 64
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You ever try changing anything? I would be interested to see what a rear swaybar adjustment would do since it basically has a direct affect on spring rates under compression.
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08-06-2019, 10:50 PM | #11 |
Who Needs to KNOW?
Drives: 18 ZLE Join Date: May 2018
Location: Left Side of the Moon
Posts: 1,770
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There is very little travel in back - that's what hurts. No distance to soak up the bumps.
If possible, try softer tire. Ps4S for daily = awesome!
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