Just Installed Eibach Lowering Springs...Mistake?

Brax_on_Brax · 08-14-2014, 10:50 PM

Hey guys,

So a couple of days ago I had Eibach Pro-Kit lowering springs installed on the Z. From my understanding and the given specs, they were suppose to lower the front end 1' lower than the rear to keep it even (9' front,8' rear). However, after the install, it seems as though the rear is much noticabley lower than the front? I checked the last three numbers on the springs (001 for fronts and 002 for rears) and they match up. I've driven it for the past couple days to get it to settle before the alignment but it does not seem like it settled at all. Anyone know of a possible cause for this? Or is this normal and I'm just paranoid..

Before and After Pictures...

kenchan · 08-14-2014, 11:52 PM

did you take any height measurements before lowering?

also, are you just seeing more neg camber on the rear which makes it appear lower
than it really its?

lastly why did you not run swifts?

wheee! · 08-14-2014, 11:55 PM

+1 for the Swifts..... best performance spring that also lowers...

Brax_on_Brax · 08-15-2014, 12:02 AM

Stupidly, no i did not take before measurements but yes the rear is still slightly cambered. I originally was going to go with Swift but after some research i chose Eibach due to them being lighter than the swifts, the amount of history and seniority, investments in technology, and positive feedback from others.

wheee! · 08-15-2014, 12:05 AM

Quote:

Originally Posted by Brax_on_Brax

Stupidly, no i did not take before measurements but yes the rear is still slightly cambered. I originally was going to go with Swift but after some research i chose Eibach due to them being lighter than the swifts, the amount of history and seniority, investments in technology, and positive feedback from others.

Wait, you confuse me... after all that you still bought the Eibachs????

Brax_on_Brax · 08-15-2014, 12:11 AM

Yes, I did. But regardless, the issue isn't with the springs, it's with the height. They are suppose to be even and they are not. Car drivers great, but i just can't get over the height difference.

wheee! · 08-15-2014, 12:18 AM

They might still settle a bit and even out like you want them too....

All the local guys that had lowering springs before the Swifts came out (H&R, Eibach, Tein), changed them for Swifts.... mainly for handling improvements. Only thing better IMHO is coil overs.

kenchan · 08-15-2014, 12:19 AM

Quote:

Originally Posted by Brax_on_Brax

Yes, I did. But regardless, the issue isn't with the springs, it's with the height. They are suppose to be even and they are not. Car drivers great, but i just can't get over the height difference.

that's a confusing statement cause if it wasnt for the springs the car would sit correctly at stock height.

and how much was the weight difference between the swifts? i seriously doubt you're going to feel any difference unless over 50lbs which im pretty sure it
wasn't.

regardless, it's not the end of the world. you can make spacers and raise the rear if you want.

Brax_on_Brax · 08-15-2014, 12:29 AM

The swifts were a couple pounds heavier than the eibachs. I know that overall, that is enough weight to affect anything that we can feel but I figured that the stock shocks would be super sensitive to change in weight. I apologize if I'm being contradictive or confusing. I've never lowered my car before so this was all new to me. Only if i knew this prior..

Brax_on_Brax · 08-15-2014, 12:35 AM

that is not** enough

SmokeEater27 · 08-15-2014, 10:24 AM

OP Im not a suspension pro but I think it might be the negative camber in the rear making it seem lower then it is, like Kenchan said above. An aligment should help sit the sidewall more upright instead of sunken into the fender as it sits now. The suspension from the little bit of knowledge I have should have more of a "raked" (unless you want to be slammed) look. This allows the front to sit lower then the rear to allow the rear to compensate for the drop it naturally gets from acceleration. Im running the ARK GT-S springs personally and I have a 1.40' drop Front and 1.20' drop rear and had the same issue with bad camber at first but alignment and spacers make it sit alot better now.

kenchan · 08-15-2014, 10:30 AM

Quote:

Originally Posted by Brax_on_Brax

The swifts were a couple pounds heavier than the eibachs. I know that overall, that is enough weight to affect anything that we can feel but I figured that the stock shocks would be super sensitive to change in weight. I apologize if I'm being contradictive or confusing. I've never lowered my car before so this was all new to me. Only if i knew this prior..

the spring rates and allowed stroke will determine how well your stock
dampers match the springs. swift has been very good about this... mores so
than eibach.

but you can raise the rear a tad if you dont like the tanabe-boat-look.

by making spacers to fit above the rear spring mount.

Gurps · 08-15-2014, 01:23 PM

I have had Eibachs on my car for over a year and love them.

I chose them because they had a mild drop.

As for sitting lower in the back, something is wrong. My car sits lower in the front and does not have the boat look. I had a full alignment and camber kit installed to bring back to factory specs. That could be the issue. But I can assure you it should not sit like that.

Brax_on_Brax · 08-16-2014, 08:35 AM

Well got it all handled yesterday. After an alignment, I found out that the only issue with the drop was that the rear wheels were -3.1 cambered. I ordered camber bolts (align kit) that will add 3' camber to each side, therefore eliminating tire wear and most importantly, evening out the front and back due to the raise wheels. Thanks everyone for your help and input.

Super Werty · 08-16-2014, 08:59 AM

You will need to toe bolts as well if you want zero negative camber. Trust me I have the same eibach springs.

08-14-2014, 11:55 PM	#3 (permalink)
wheee! A True Z Fanatic Join Date: Sep 2009 Location: Mod Capital of Canada Age: 57 Posts: 7,354 Drives: cars. lots of cars. Rep Power: 40182	+1 for the Swifts..... best performance spring that also lowers... __________________ H&R / Stillen / Berk / HKS / Swift / Michelin / UpRev / SPC / Amuse Rep / Seibon / Fringe XVO / TWM / more... My Journal

08-15-2014, 12:18 AM	#7 (permalink)
wheee! A True Z Fanatic Join Date: Sep 2009 Location: Mod Capital of Canada Age: 57 Posts: 7,354 Drives: cars. lots of cars. Rep Power: 40182	They might still settle a bit and even out like you want them too.... All the local guys that had lowering springs before the Swifts came out (H&R, Eibach, Tein), changed them for Swifts.... mainly for handling improvements. Only thing better IMHO is coil overs. kenchan likes this. __________________ H&R / Stillen / Berk / HKS / Swift / Michelin / UpRev / SPC / Amuse Rep / Seibon / Fringe XVO / TWM / more... My Journal

08-15-2014, 10:24 AM	#11 (permalink)
SmokeEater27 Base Member Join Date: Apr 2013 Location: Orlando, FL Posts: 144 Drives: Like OJ In A Bronco Rep Power: 12	OP Im not a suspension pro but I think it might be the negative camber in the rear making it seem lower then it is, like Kenchan said above. An aligment should help sit the sidewall more upright instead of sunken into the fender as it sits now. The suspension from the little bit of knowledge I have should have more of a "raked" (unless you want to be slammed) look. This allows the front to sit lower then the rear to allow the rear to compensate for the drop it naturally gets from acceleration. Im running the ARK GT-S springs personally and I have a 1.40' drop Front and 1.20' drop rear and had the same issue with bad camber at first but alignment and spacers make it sit alot better now. __________________ LLUMAR TINT 15% l ARK GT-S SPRINGS l STILLEN GEN 3 C.A.I l MOMO SHIFTER l Z1 SPACERS 20MM (F)/25MM (R).....STILL LOADING

08-16-2014, 08:59 AM	#15 (permalink)
Super Werty Track Member Join Date: Jul 2013 Location: AZ Posts: 668 Drives: '13 Sport Rep Power: 13	You will need to toe bolts as well if you want zero negative camber. Trust me I have the same eibach springs. __________________ The Build Last edited by Super Werty; 08-16-2014 at 12:25 PM.

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08-14-2014, 11:52 PM	#2 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	did you take any height measurements before lowering? also, are you just seeing more neg camber on the rear which makes it appear lower than it really its? lastly why did you not run swifts?

08-15-2014, 12:02 AM	#4 (permalink)
Brax_on_Brax Base Member Join Date: Feb 2014 Location: Naples, FL Posts: 16 Drives: 11' 370z Rep Power: 11	Stupidly, no i did not take before measurements but yes the rear is still slightly cambered. I originally was going to go with Swift but after some research i chose Eibach due to them being lighter than the swifts, the amount of history and seniority, investments in technology, and positive feedback from others.

08-15-2014, 12:11 AM	#6 (permalink)
Brax_on_Brax Base Member Join Date: Feb 2014 Location: Naples, FL Posts: 16 Drives: 11' 370z Rep Power: 11	Yes, I did. But regardless, the issue isn't with the springs, it's with the height. They are suppose to be even and they are not. Car drivers great, but i just can't get over the height difference.

08-15-2014, 12:29 AM	#9 (permalink)
Brax_on_Brax Base Member Join Date: Feb 2014 Location: Naples, FL Posts: 16 Drives: 11' 370z Rep Power: 11	The swifts were a couple pounds heavier than the eibachs. I know that overall, that is enough weight to affect anything that we can feel but I figured that the stock shocks would be super sensitive to change in weight. I apologize if I'm being contradictive or confusing. I've never lowered my car before so this was all new to me. Only if i knew this prior..

08-15-2014, 12:35 AM	#10 (permalink)
Brax_on_Brax Base Member Join Date: Feb 2014 Location: Naples, FL Posts: 16 Drives: 11' 370z Rep Power: 11	that is not** enough

08-15-2014, 01:23 PM	#13 (permalink)
Gurps Base Member Join Date: Aug 2011 Location: Vancouver Posts: 93 Drives: Nissan Rep Power: 14	I have had Eibachs on my car for over a year and love them. I chose them because they had a mild drop. As for sitting lower in the back, something is wrong. My car sits lower in the front and does not have the boat look. I had a full alignment and camber kit installed to bring back to factory specs. That could be the issue. But I can assure you it should not sit like that.

08-16-2014, 08:35 AM	#14 (permalink)
Brax_on_Brax Base Member Join Date: Feb 2014 Location: Naples, FL Posts: 16 Drives: 11' 370z Rep Power: 11	Well got it all handled yesterday. After an alignment, I found out that the only issue with the drop was that the rear wheels were -3.1 cambered. I ordered camber bolts (align kit) that will add 3' camber to each side, therefore eliminating tire wear and most importantly, evening out the front and back due to the raise wheels. Thanks everyone for your help and input.