FIX ILEAN (she leans too much) - Page 2 - ZR-1 Net Registry Forums

Paul Workman · 10-14-2014

A very interesting topic! LEAN is a common enough occurrence with these cars to warrant a TECH article. A teensy bit to a major list, seems MOST have a little. I myself have dealt with it on my 95, and now I've got a wee bit on the Z. A comprehensive article would be oh so good. Brett???? (JK...sorta)

IF someone(s) want to PM me with the nuts and bolts (so to speak) of a process for leveling these cars, I will be more than happy to write it up (about all I can contribute to this topic, unfortunately).

Any volunteers??

Karl · 10-14-2014

I am about 1/2" higher on the passenger side. Seems like coil overs are the cure.

I personally hate that!

We Gone · 10-14-2014

My 93 has 1/4 inch difference, higher on the right. The 91 was the same but I made an adjustment to the rear spring bolts (I have the longer bolts with the nylon lock nut) I had to tighten the left up about an inch to get it level.

I'm sure this may upset the cars stability in some way due to the torsional twist on the frame and I may not leave it.

Note: All measurements were done to body panels and not to the FSM trim height locations.

USAZR1 · 10-14-2014

Our 94 was a little higher on the right front before I installed the VB&P adjustable spring. With its threaded adjusters on each side,ride height on either side is easy to change & fine-tune. I also installed a pair of 11" long 14mm rear spring bolts that I purchased at my local Fastenal store,for $24/pair.
Presently have the front ride height at 26 1/2" and the rear at 27".

batchman · 10-14-2014

With the stock setup (ie no front C5 style adjusters) if you lower the right rear you will primarily raise the left front - adjustment works in an "X".

HTH,
- Jeff

BigIke · 10-14-2014

Well... I believe the issue is in the back; when i lowered the back the front lowered substantially. I went to Fastenall today in Conroe and thought I needed a 9" bolt, they only had 8" and 10".

Anyone know how long the stock bolts are? If the 10" will work I'll go back tomorrow and buy it.

I know this is not the FIX, however, I think this will get me by and stop being so lopsided, mine leans a lot.

Blue Flame Restorations · 10-14-2014

I believe you are only fixing a symptom of the real issue by experimenting with bolts. The lean is there for a reason.

Check that rear spring, especially at each of the center mounting area. There is a good chance that the spring is fractured and failing, which could lead to an unsafe condition.

Food for thought.

BigIke · 10-14-2014

I absolutely get that, but i don't see/feel any issues externally..

Blue Flame Restorations · 10-14-2014

You may have to un-mount the spring to get a full inspection. You only have bushings and the spring itself that would cause this condition. Other than these items, you would have to have a suspension component failure happening.

Not sure if an internal rear shock failure would cause your condition.

John Boothby · 10-14-2014

I had my rear torsion bar links and bushings replaced and it seemed to have leveled the rear.

10-14-2014	#11
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,493	Re: FIX ILEAN (she leans too much) A very interesting topic! LEAN is a common enough occurrence with these cars to warrant a TECH article. A teensy bit to a major list, seems MOST have a little. I myself have dealt with it on my 95, and now I've got a wee bit on the Z. A comprehensive article would be oh so good. Brett???? (JK...sorta) IF someone(s) want to PM me with the nuts and bolts (so to speak) of a process for leveling these cars, I will be more than happy to write it up (about all I can contribute to this topic, unfortunately). Any volunteers?? __________________ Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry Last edited by Paul Workman; 10-14-2014 at 08:34 AM.

10-14-2014	#12
Karl Join Date: May 2013 Location: Chicago Posts: 980	Re: FIX ILEAN (she leans too much) I am about 1/2" higher on the passenger side. Seems like coil overs are the cure. I personally hate that! __________________ 1993 ZR-1 #211 Yellow On Beige Beast #2 1992 ZR-1 #427 Black On Black Sold 1985 L98 Blue On Blue Sold

10-14-2014	#13
We Gone Join Date: Apr 2004 Location: ATL. GA. Posts: 2,170	Re: FIX ILEAN (she leans too much) My 93 has 1/4 inch difference, higher on the right. The 91 was the same but I made an adjustment to the rear spring bolts (I have the longer bolts with the nylon lock nut) I had to tighten the left up about an inch to get it level. I'm sure this may upset the cars stability in some way due to the torsional twist on the frame and I may not leave it. Note: All measurements were done to body panels and not to the FSM trim height locations. __________________ Steve 1990 Steel Blue/Black #2355 1990 Red/Red #1473 1991 Quasar /Black #118 Sold 1991 Turquoise/Black #766 Parted Out 1993 Yellow/White #179 Sold 1990 Black/Gray #1361 Headers/4:10s Sold

10-14-2014	#14
USAZR1 Join Date: Oct 2013 Location: Wichita Falls,Tx Posts: 604	Re: FIX ILEAN (she leans too much) Our 94 was a little higher on the right front before I installed the VB&P adjustable spring. With its threaded adjusters on each side,ride height on either side is easy to change & fine-tune. I also installed a pair of 11" long 14mm rear spring bolts that I purchased at my local Fastenal store,for $24/pair. Presently have the front ride height at 26 1/2" and the rear at 27". __________________ Clint & Sherry 1994 ZR-1 White/Red #152 (sold) 1991 ZR-1 Callaway Aerobody #1332 (sold) 1990 ZR-1 Red/Red #952 (sold) 2002 Z06 Torch Red/Mod Red widebody

10-14-2014	#15
batchman Join Date: Jun 2009 Location: I live at Devens, one run at a time Posts: 455	Re: FIX ILEAN (she leans too much) With the stock setup (ie no front C5 style adjusters) if you lower the right rear you will primarily raise the left front - adjustment works in an "X". HTH, - Jeff __________________ [I]91 ZR-1 #1840, autocrossing in SCCA BSP. FIC S/S's DRM chip/Watson/Borla/lid/LW batt&headlights, springs, shocks, pads & lines, quick rack & Turn One, camber brace, 32/22mm sways, A/C halfway deleted 17x11 & 12 CCW's, 315 & 335 Hoosier A6s [/I]

10-14-2014	#16
BigIke Join Date: Aug 2014 Location: Montgomery TX Posts: 263	Re: FIX ILEAN (she leans too much) Well... I believe the issue is in the back; when i lowered the back the front lowered substantially. I went to Fastenall today in Conroe and thought I needed a 9" bolt, they only had 8" and 10". Anyone know how long the stock bolts are? If the 10" will work I'll go back tomorrow and buy it. I know this is not the FIX, however, I think this will get me by and stop being so lopsided, mine leans a lot. __________________ 1991 White ZRJuan #1616 Mileage: 56K Sept-14 -- 113k May-18!!! God Damn I Love This Car!

10-14-2014	#17
Blue Flame Restorations Join Date: Feb 2010 Location: Pendleton, IN Posts: 3,904	Re: FIX ILEAN (she leans too much) I believe you are only fixing a symptom of the real issue by experimenting with bolts. The lean is there for a reason. Check that rear spring, especially at each of the center mounting area. There is a good chance that the spring is fractured and failing, which could lead to an unsafe condition. Food for thought. __________________ 1988 KOH Prototype EX5023 sold 1990 ZR-1 #444 Convertible 1990 ZR-1 Black #966 1991 ZR-1 Quazar Blue #296 1957 Duntov SS Project

10-14-2014	#20
John Boothby Join Date: Jul 2005 Location: Las Vegas, Nevada Posts: 777	Re: FIX ILEAN (she leans too much) I had my rear torsion bar links and bushings replaced and it seemed to have leveled the rear. __________________ JB 1990 #148 Red/Saddle Haibeck AYBKG5 Chip/RC Engineering/Flowmasters/K&N/Samco/Fuzzy Dice :cheers: