2 sets of lowering spring and rear still is stock

Redwings1 · 10-18-2022, 10:46 PM

New 2023 ZL1, tried H & R lowering springs dropped front about 1 3/8" rear went up 1/4". Called H & R said I had the wrong spring they were for a non magneride car. I have those for sale. Bought Phastek RST PX1 springs lowered the front 1 1/2" and rear stayed the same!! What am I doing wrong? Is there some adjustment the dealer can do? The stance of the car needs to be lowered about a 1"-1 1/2" in the back to sit right. Please anyone who has lowered their ZL1 did the rear drop? Thanks Steve

cdb95z28 · 10-19-2022, 01:19 AM

Gotta time any rubber bushed joints. Front or rear. Rubber bushed joints are tightened at static ride height. If the static ride heights change the rubber bushings will be in a state of bind. They now have a slight twist that adds stiffness/rate, keeping the car from sitting in a proper neutral state.

Loosen the rubber bushed suspension joints at ride height, jounce the car, then retighten those joints. You may have too replace the various one time use torque to yield bolts at those points. Then get an alignment.

WillyZ83 · 10-21-2022, 12:20 PM

I have some eibach lowering springs if you want to buy them. It gave a good drop in the rear

Redwings1 · 10-21-2022, 02:16 PM

Maybe. I'm going to try what cdb95z28 suggested first.

10-18-2022, 10:46 PM	#1
Redwings1 Drives: 23 ZL1, 22 C8 Sold. 21 LT1 Sold Join Date: Jan 2021 Location: MI Posts: 119	2 sets of lowering spring and rear still is stock New 2023 ZL1, tried H & R lowering springs dropped front about 1 3/8" rear went up 1/4". Called H & R said I had the wrong spring they were for a non magneride car. I have those for sale. Bought Phastek RST PX1 springs lowered the front 1 1/2" and rear stayed the same!! What am I doing wrong? Is there some adjustment the dealer can do? The stance of the car needs to be lowered about a 1"-1 1/2" in the back to sit right. Please anyone who has lowered their ZL1 did the rear drop? Thanks Steve

10-19-2022, 01:19 AM	#2
cdb95z28 Drives: 2022 1SS 1LE A10 BCD WCT+PDR Join Date: Mar 2008 Location: Johnstown, PA Posts: 3,840	Gotta time any rubber bushed joints. Front or rear. Rubber bushed joints are tightened at static ride height. If the static ride heights change the rubber bushings will be in a state of bind. They now have a slight twist that adds stiffness/rate, keeping the car from sitting in a proper neutral state. Loosen the rubber bushed suspension joints at ride height, jounce the car, then retighten those joints. You may have too replace the various one time use torque to yield bolts at those points. Then get an alignment. __________________ 2022 1SS 1LE A10 BCD WCT+PDR2014 1SS 1LE NPP RECARO SIM-SOLD1995 Z28 M6 GSC PGM-SOLD1975 NOVA COUPE 300HP 350 TH350 FLASH RED-SOLD "KEEP THE FAITH"-Fbodfather

10-21-2022, 12:20 PM	#3
WillyZ83 Drives: 18 zl1 garnet red Join Date: Aug 2021 Location: TX Posts: 287	I have some eibach lowering springs if you want to buy them. It gave a good drop in the rear __________________ IG - @zl1_will 2022 zl1 740hp / 730tq stolen 2018 zl1 Maggie - 2" headers - flex fuel - lowside fuel ssytem - +30 injectors - cordes ice tank - spl rear linkage arms

10-21-2022, 02:16 PM	#4
Redwings1 Drives: 23 ZL1, 22 C8 Sold. 21 LT1 Sold Join Date: Jan 2021 Location: MI Posts: 119	Maybe. I'm going to try what cdb95z28 suggested first.

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