PCMforless

Go Back   The Z28 Forums > Tech Talk > 4th Gen LT1 (1993-1997) > Suspension
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1 (permalink)  
Old 05-07-2009, 11:01 PM
Z28.com-er
 
Join Date: Nov 2007
Location: Carpentersville
Posts: 71
Car unlevel

I've got a problem that I need some expert help with. My car's rear end doesn't sit level. From the floor to the edge of the wheelwell measures 27 1/4" right, 28 on the left? The spring on the right side does look a little collapsed. Has anyone seen this problem before?
I've had the car for about a year and just noticed this a couple of weeks ago
Thanks for your help!

Names Jay, the car is a 94 convert Z28, a4, bone stock (so far)
Reply With Quote
  #2 (permalink)  
Old 05-07-2009, 11:10 PM
abiggerjimjr's Avatar
Z28.com-er
 
Join Date: Oct 2007
Location: Sacramento, CA
Posts: 614
I've heard of a car having a higher unweighted ride height on the driver's side to compensate for the weight of the driver. Not sure if that's the case on our cars....
__________________

1995 Camaro Z/28 M6 - 119kmiles, Custom Ram CAI w/ K&N air filter, ZOOM Kevlar Clutch, 3" Powerstick, KYB AGX Shocks, 1.5" lowering springs, Eagle F1's on C5 wheels
Quote:
Originally Posted by Greg Norris View Post
Having a car with great looks and no power is like stuffing a sock down your pants... its all great, till you have to perform
Reply With Quote
  #3 (permalink)  
Old 05-08-2009, 03:58 PM
Z28.com-er
 
Join Date: Apr 2009
Location: Toledo
Posts: 184
yeah Ive seen it.
My car to lol...
When I got my car the rear swung and tapped a tree from the person before me. We fixxed the quarter panell ,and everything else that went with it, but mine sitts uneven to.
Reply With Quote
  #4 (permalink)  
Old 05-08-2009, 05:07 PM
Z28.com-er
 
Join Date: Nov 2007
Location: Carpentersville
Posts: 71
I just can't see how the differece can come about. The springs are the same both sides, the spring pockets are the same too. I think I'll switch to a set of lowering springs and Bilsteins and see what happens. Thanks for your thoughts.

Jay
Reply With Quote
  #5 (permalink)  
Old 05-08-2009, 10:05 PM
abiggerjimjr's Avatar
Z28.com-er
 
Join Date: Oct 2007
Location: Sacramento, CA
Posts: 614
Quote:
Originally Posted by jgreen View Post
I just can't see how the differece can come about. The springs are the same both sides, the spring pockets are the same too. I think I'll switch to a set of lowering springs and Bilsteins and see what happens. Thanks for your thoughts.

Jay
Weight distribution is heavily involved ride height.
__________________

1995 Camaro Z/28 M6 - 119kmiles, Custom Ram CAI w/ K&N air filter, ZOOM Kevlar Clutch, 3" Powerstick, KYB AGX Shocks, 1.5" lowering springs, Eagle F1's on C5 wheels
Quote:
Originally Posted by Greg Norris View Post
Having a car with great looks and no power is like stuffing a sock down your pants... its all great, till you have to perform
Reply With Quote
  #6 (permalink)  
Old 05-09-2009, 11:22 AM
Z28.com-er
 
Join Date: Dec 2006
Location: Calgary
Posts: 505
Unbolt the bottom shock absorber bolts and push the shocks up. If they dont slowly recoil you might need replacements. If one is weaker than the other that could account for one side sitting lower.
__________________
Edelbrock tubular headers, Flowmaster catback exhaust 80 series, 30lb injectors, 58mm BBK throttlebody, K&N cold air intake, 8.5 MSD ignition wires,MSD blaser coil, MSD vented opti, trickflow heads, comp cams 1.6 roller rockers, comp cam Hydraulic roller lifters, Comp cam 7.02" pushrods, Comp cam timing chain set, 503 comp cam,Trickflow steel elbow, C5 corvette rims, CAT eliminated,LT1 edelbrock performer intake
Reply With Quote
  #7 (permalink)  
Old 05-09-2009, 01:49 PM
Z28.com-er
 
Join Date: Nov 2007
Location: Carpentersville
Posts: 71
Quote:
Originally Posted by stoggy94z View Post
Unbolt the bottom shock absorber bolts and push the shocks up. If they dont slowly recoil you might need replacements. If one is weaker than the other that could account for one side sitting lower.
Thanks, I think you might be right. The car has 69K on it and all original. That plus sitting so long every year undriven (not a Chicago winter car!) makes me want to do the suspension. Now I need to search for the best budget spring/shock package.
Reply With Quote
  #8 (permalink)  
Old 05-09-2009, 06:05 PM
abiggerjimjr's Avatar
Z28.com-er
 
Join Date: Oct 2007
Location: Sacramento, CA
Posts: 614
Quote:
Originally Posted by stoggy94z View Post
Unbolt the bottom shock absorber bolts and push the shocks up. If they dont slowly recoil you might need replacements. If one is weaker than the other that could account for one side sitting lower.
Shocks have nothing to do with ride height, only compression and decompression dampening. In other words, the shocks are only doing something while they are moving.
__________________

1995 Camaro Z/28 M6 - 119kmiles, Custom Ram CAI w/ K&N air filter, ZOOM Kevlar Clutch, 3" Powerstick, KYB AGX Shocks, 1.5" lowering springs, Eagle F1's on C5 wheels
Quote:
Originally Posted by Greg Norris View Post
Having a car with great looks and no power is like stuffing a sock down your pants... its all great, till you have to perform
Reply With Quote
  #9 (permalink)  
Old 05-09-2009, 07:41 PM
Lethalchem's Avatar
Z28.com-er
 
Join Date: Nov 2004
Location: NLR, AR
Posts: 7,107
Check your front springs and see if one of them was put in upsidedown. My old Z sat slightly off like you're describing, but I didn't think much of it. While doing some other work on the front of the car, I noticed the spring on the left was in upsidedown, which affected the opposite side rear. Flipped it over and everything was fine. Good luck. It's worth a look, since it's a free fix.
__________________

03 Cobra
99 Turbo Miata
96 Z28 (SOLD)
Reply With Quote
  #10 (permalink)  
Old 05-10-2009, 10:29 AM
Z28.com-er
 
Join Date: Dec 2006
Location: Calgary
Posts: 505
Quote:
Originally Posted by abiggerjimjr View Post
Shocks have nothing to do with ride height, only compression and decompression dampening. In other words, the shocks are only doing something while they are moving.
That is correct but if they have gas charged shock absorbers that are supposed to extend after they do their job it could play a part. If one side has a stronger charged shock absorber than the other side then there will be more force holding that side of the car up. ALSO if one shock absorber was weak for quite a while then it may have affected the installed height of the spring (by fatigue) on the side with the bad shock.

I understand the Primary purpose of the shock absorber is to help dampen spring oscillation, if they are the gas charged shock absorbers they will also play a MINOR part in ride height.
__________________
Edelbrock tubular headers, Flowmaster catback exhaust 80 series, 30lb injectors, 58mm BBK throttlebody, K&N cold air intake, 8.5 MSD ignition wires,MSD blaser coil, MSD vented opti, trickflow heads, comp cams 1.6 roller rockers, comp cam Hydraulic roller lifters, Comp cam 7.02" pushrods, Comp cam timing chain set, 503 comp cam,Trickflow steel elbow, C5 corvette rims, CAT eliminated,LT1 edelbrock performer intake
Reply With Quote
  #11 (permalink)  
Old 05-10-2009, 12:00 PM
abiggerjimjr's Avatar
Z28.com-er
 
Join Date: Oct 2007
Location: Sacramento, CA
Posts: 614
Quote:
Originally Posted by stoggy94z View Post
That is correct but if they have gas charged shock absorbers that are supposed to extend after they do their job it could play a part. If one side has a stronger charged shock absorber than the other side then there will be more force holding that side of the car up. ALSO if one shock absorber was weak for quite a while then it may have affected the installed height of the spring (by fatigue) on the side with the bad shock.

I understand the Primary purpose of the shock absorber is to help dampen spring oscillation, if they are the gas charged shock absorbers they will also play a MINOR part in ride height.
That's fair. I will concede to you on that.
__________________

1995 Camaro Z/28 M6 - 119kmiles, Custom Ram CAI w/ K&N air filter, ZOOM Kevlar Clutch, 3" Powerstick, KYB AGX Shocks, 1.5" lowering springs, Eagle F1's on C5 wheels
Quote:
Originally Posted by Greg Norris View Post
Having a car with great looks and no power is like stuffing a sock down your pants... its all great, till you have to perform
Reply With Quote
  #12 (permalink)  
Old 05-10-2009, 01:46 PM
Forgiven's Avatar
Z28.com-er
 
Join Date: Jun 2003
Location: Canada
Posts: 2,321
Some good info here. If I were trouble shooting this I'd first switch springs and shocks from one side to the other (rears are easy to do) to see if it fixes it. My car is out by about .25 -.5". It also has been in a minor accident which I figure is why. It is annoying not having it perfect, but as long as it drives true I have put it out of my mind.
__________________


What really matters is where I will spend eternity...
Reply With Quote
  #13 (permalink)  
Old 05-11-2009, 09:51 AM
Z28.com-er
 
Join Date: Nov 2007
Location: Carpentersville
Posts: 71
Thanks for all the good thoughts, guys. Right now, I'm planning for Vogtland springs and KYB shocks. Those and an adjustable PHB should tap me out for a while.

Jay
Reply With Quote
  #14 (permalink)  
Old 05-11-2009, 10:24 AM
dkishton1486's Avatar
Z28.com-er
 
Join Date: Feb 2005
Location: Boardman Ohio
Posts: 1,506
Send a message via AIM to dkishton1486 Send a message via Yahoo to dkishton1486
You dont by chance have anything in your trunk/rear compartment do you?
__________________
*95 Z28 M6 (Muff) Dont Dive Til 5. No Muff To Tough!* *Free mods* *160 t-stat**Moroso 8mm Wires**Flowmaster 3" Exhaust*
*Edelbrock TES headers and y-pipe**New LT1 Crate Engine 357**Cat delete**K&N FIPK**Moroso Solid Motor Mounts*

Reply With Quote
  #15 (permalink)  
Old 05-11-2009, 05:43 PM
Z28.com-er
 
Join Date: Nov 2007
Location: Carpentersville
Posts: 71
Quote:
Originally Posted by dkishton1486 View Post
You dont by chance have anything in your trunk/rear compartment do you?
Nope, empty!
I'm pretty sure the rr spring is colapsed.
Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -5. The time now is 01:21 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2010, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.3.0
Site and Contents Copyright © 2009-2010 Z28.com All Rights Reserved