C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

lower a 89

Thread Tools
 
Search this Thread
 
Old Sep 20, 2021 | 04:52 PM
  #1  
BUCKSFAN's Avatar
BUCKSFAN
Thread Starter
Pro
15 Year Member
 
Joined: Jul 2005
Posts: 547
Likes: 21
Default lower a 89

ok guys any help here would be great, I am trying to find a way to lower the car it sits way too high on the stock wheels. I really don't want to go coil overs as it could cause driveline vibrations. I am really at a loss here and could use some help. Has anyone lowered theirs and what did you. as you can see it needs some help, thanks ahead of time

do.
Reply
Old Sep 20, 2021 | 05:12 PM
  #2  
Tom400CFI's Avatar
Tom400CFI
Team Owner
Pro Mechanic
20 Year Member
 
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Default

To lower the rear, unscrew the nuts on the spring bolts. If the spring bolts don't offer enough length, there are longer ones for sale from most vendors. I made some out of Grade 8 rebar.

To lower the front, trim the rubber pads under the center and/or outer spring perches. I don't think that your car sits too high...but I know it's a matter of opinion.
Reply
Old Sep 20, 2021 | 05:43 PM
  #3  
KMS88Cal#16's Avatar
KMS88Cal#16
Pro
Photogenic
Liked
Loved
Community Favorite
 
Joined: Dec 2017
Posts: 534
Likes: 162
From: Omaha, NE
Default Lowering

Your convertible has an x-brace under it, which makes it have 1 1/4” less ground clearance than the coupes. Speed bumps aren’t friendly for a std height corvette and less for a Vert with the x-brace. It’s your car to do with what you want. I have an 88 Vert and I wouldn’t lower it. Your car looks great! Have fun cruising in it. Top down of coarse! Kevin
Reply
Old Sep 20, 2021 | 06:35 PM
  #4  
cv67's Avatar
cv67
Team Owner
15 Year Member
 
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Default

Learned about that cross brace the hard way also. Many that lower these cars wind up raising them back up due to clearance issues.
Looks great but it stops there. How would adjustable coil overs give you vibrations? It will be easier to raise or lower if the mood hits ya
Reply
Old Sep 21, 2021 | 05:41 AM
  #5  
BUCKSFAN's Avatar
BUCKSFAN
Thread Starter
Pro
15 Year Member
 
Joined: Jul 2005
Posts: 547
Likes: 21
Default

thank you,
Reply
Old Sep 21, 2021 | 06:46 AM
  #6  
Phobos84's Avatar
Phobos84
Melting Slicks
Supporting Lifetime
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2002
Posts: 2,884
Likes: 767
From: Sligo PA
Default

I couldn't imagine lowering a convertible with the X brace. I put coil overs on the front of my 84 coup and longer bolts in the back. I got it set in my garage to the perfect height. It looked awesome. The fact was when I went to drive it to the alignment shop I couldn't get it out of my own driveway. I had to bring it back in the garage and lift it up another inch. It still looks good. But not as low as I would like.
Reply
Old Sep 21, 2021 | 07:37 AM
  #7  
Dredgeguy's Avatar
Dredgeguy
Racer
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2012
Posts: 401
Likes: 161
From: Ellicott City MD
Default

Vendors sell the 1-2" lowering bolts for the rear. I lowered mine 1.5" just in the rear, kept the front standard and it looks better now and still have decent ground clearance. The bolts are inexpensive and you can do the change in less than 30 minutes. If you do not like the results, just change it back.

Last edited by Dredgeguy; Sep 21, 2021 at 07:39 AM. Reason: Added more information
Reply
Old Sep 21, 2021 | 08:58 AM
  #8  
Tom400CFI's Avatar
Tom400CFI
Team Owner
Pro Mechanic
20 Year Member
 
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Default

You don't have to change it back...just crank the nuts back UP, on the new lowering bolts (if you get 'em).
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!

 Michael S. Palmer
story-1

5 Best & 5 Worst Corvette Daily Drivers

 Joe Kucinski
story-2

The Headlights of Every Corvette Generation Explained

 Joe Kucinski
story-3

5 Best & 5 Most Overrated Corvette Track Packages of All Time!

 Joe Kucinski
story-4

Every 2027 Corvette Engine Explained

 Joe Kucinski
story-5

Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

 Verdad Gallardo
story-6

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-7

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-8

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-9

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
Old Sep 21, 2021 | 04:38 PM
  #9  
Phobos84's Avatar
Phobos84
Melting Slicks
Supporting Lifetime
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2002
Posts: 2,884
Likes: 767
From: Sligo PA
Default

Originally Posted by Tom400CFI
You don't have to change it back...just crank the nuts back UP, on the new lowering bolts (if you get 'em).

That's the nice thing with doing coil overs in the front. If you ever get sick of scraping on every speed bump and pot hole you can just adjust it up more.
Reply
Old Sep 21, 2021 | 07:43 PM
  #10  
Tom400CFI's Avatar
Tom400CFI
Team Owner
Pro Mechanic
20 Year Member
 
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Default

I'm sure that you could shim the stock front spring, too.

The nice thing about coil overs is easy access to off the shelf spring rates. That's about it.
Reply
Old Sep 21, 2021 | 09:42 PM
  #11  
Kevova's Avatar
Kevova
Le Mans Master
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2013
Posts: 6,192
Likes: 750
From: near the thumb in the mitten
Default

Verts actually sit higher than coupes to compensate for x brace. I have a lowered coupe and hesitant to install x brace. I would only have 3-3.5 inches of ground clearance.
Reply

Get notified of new replies

To lower a 89





All times are GMT -4. The time now is 08:55 PM.

story-0
2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!

Slideshow: Is the 2027 Chevrolet Silverado 1500 the best Silverado yet?

By Michael S. Palmer | 2026-06-16 08:01:12


VIEW MORE
story-1
5 Best & 5 Worst Corvette Daily Drivers

Slideshow: 5 best and 5 worst Corvette daily drivers

By Joe Kucinski | 2026-06-15 10:32:13


VIEW MORE
story-2
The Headlights of Every Corvette Generation Explained

Slideshow: The headlights of every Corvette generation explained

By Joe Kucinski | 2026-06-15 10:17:14


VIEW MORE
story-3
5 Best & 5 Most Overrated Corvette Track Packages of All Time!

Slideshow: The 5 best and 5 most overrated Corvette track packages ever.

By Joe Kucinski | 2026-06-09 12:46:45


VIEW MORE
story-4
Every 2027 Corvette Engine Explained

Slideshow: Every 2027 Corvette engine explained

By Joe Kucinski | 2026-06-09 12:16:31


VIEW MORE
story-5
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.

By Verdad Gallardo | 2026-06-08 19:53:43


VIEW MORE
story-6
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-7
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-8
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-9
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE