Uneven ride height, stock suspension - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

DrivingisReligion · 01-10-2023, 06:10 PM

I have been noticing the rear left sitting lower than rear right for some time now, not much but definitely noticeable. So I raised the car on stands all 4 corners, perfectly flat ground even used a level to make sure the bubble is at dead center all 4 corners. Removed the wheels off, started measuring multiple times every corner, fender to hub and rotor. Front left and right match as expected. Rear left hub assembly measures .25inch higher then rear right, that means with wheels on, rear left is .25inch lower than right. Pulled rear shocks out, measured them, they are perfectly even. Now remeasured(In different ways I can imagine) the fender to hub/rotor without shocks and still the left hangs .25 inch higher then right. So spring rate is a non issue.

Did I hit something hard and bend a suspension component? Any guesses what could it be? I can fix this problem by getting coilovers and adjusting rear left coilovers .25 inch longer than rear right and make the ride height even all 4 corners but I would like to really address the root of this issue. Thanks in advance.

Edit: also the alignment is clean, no pulling and no uneven tire wear. "Scratchingmyhead.gif"

strat61caster · 01-10-2023, 07:09 PM

Fenders aren’t necessarily even left to right, measure the pinch welds and I bet a lot of the discrepancy goes away. Having an even alignment points to this maybe not being a suspension issue.

Also make sure springs are fully seated in their pockets on the dampers.

Turdinator · 01-10-2023, 10:21 PM

.25" is not a huge amount. I totally get that it would bug you but at the end of the day I wouldn't worry too much about a small difference.

That said, as mentioned check how the springs seat and maybe even swap the left and right springs to see if the height difference changes side.

Racecomp Engineering · 01-11-2023, 10:28 AM

Stock suspension usually isn't perfectly even. 1/4 inch is maybe a little more than usual but I've definitely seen it.

- Andrew

162blade · 01-12-2023, 10:35 AM

Quote:

Originally Posted by Racecomp Engineering

Stock suspension usually isn't perfectly even. 1/4 inch is maybe a little more than usual but I've definitely seen it.

- Andrew

Andrew,

I have the same issue with my SS1 coilovers on my 23 BRZ. Driver's rear has 15mm more threads showing to achieve a level height.

Is this, ok? I don't want to hurt the performance of the setup if there is an issue.

Racecomp Engineering · 01-12-2023, 11:32 AM

Quote:

Originally Posted by 162blade

Andrew,

I have the same issue with my SS1 coilovers on my 23 BRZ. Driver's rear has 15mm more threads showing to achieve a level height.

Is this, ok? I don't want to hurt the performance of the setup if there is an issue.

100% okay. Corner weights are not equal left and right.

If you google for corner weights on a stock or modified BRZ/86 you'll see numbers all over the place depending on driver weight, how much fuel, whether swaybars are still attached, what day the car was built (jk), and so on.

- Andrew

dragoontwo · 01-12-2023, 11:42 AM

Quote:

Originally Posted by Racecomp Engineering

100% okay. Corner weights are not equal left and right.

If you google for corner weights on a stock or modified BRZ/86 you'll see numbers all over the place depending on driver weight, how much fuel, whether swaybars are still attached, what day the car was built (jk), and so on.

- Andrew

Sake cans discarded vary in panel location and quantity depending on day.

x808drifter · 01-13-2023, 06:47 AM

Weather or not you let one go in the car or got out before hand.

01-10-2023, 06:10 PM	#1
DrivingisReligion Sleeper Join Date: Jan 2015 Drives: WRB_BRZ Location: STL Posts: 25 Thanks: 10 Thanked 3 Times in 2 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Uneven ride height, stock suspension I have been noticing the rear left sitting lower than rear right for some time now, not much but definitely noticeable. So I raised the car on stands all 4 corners, perfectly flat ground even used a level to make sure the bubble is at dead center all 4 corners. Removed the wheels off, started measuring multiple times every corner, fender to hub and rotor. Front left and right match as expected. Rear left hub assembly measures .25inch higher then rear right, that means with wheels on, rear left is .25inch lower than right. Pulled rear shocks out, measured them, they are perfectly even. Now remeasured(In different ways I can imagine) the fender to hub/rotor without shocks and still the left hangs .25 inch higher then right. So spring rate is a non issue. Did I hit something hard and bend a suspension component? Any guesses what could it be? I can fix this problem by getting coilovers and adjusting rear left coilovers .25 inch longer than rear right and make the ride height even all 4 corners but I would like to really address the root of this issue. Thanks in advance. Edit: also the alignment is clean, no pulling and no uneven tire wear. "Scratchingmyhead.gif"

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01-11-2023, 10:28 AM	#4
Racecomp Engineering Join Date: Nov 2011 Drives: 2016 BRZ, 2012 Paris Di2 & 2018 STI Location: Severn, MD Posts: 5,520 Thanks: 3,542 Thanked 7,415 Times in 3,033 Posts Mentioned: 311 Post(s) Tagged: 9 Thread(s)	Stock suspension usually isn't perfectly even. 1/4 inch is maybe a little more than usual but I've definitely seen it. - Andrew

01-13-2023, 06:47 AM	#8
x808drifter LMGTFY Join Date: Mar 2016 Drives: 13 FRS, 91 Miata Location: Lava Town, HI Posts: 2,776 Thanks: 5,561 Thanked 3,650 Times in 1,625 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	Weather or not you let one go in the car or got out before hand.

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