C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

81 Upgrades?

Thread Tools
 
Search this Thread
 
Old Sep 15, 2011 | 10:38 PM
  #1  
MattCC81's Avatar
MattCC81
Thread Starter
Instructor
 
Joined: Apr 2011
Posts: 121
Likes: 0
Default 81 Upgrades?

Recently added cam, intake, carb, headers.
(I set money aside to finish off the exhaust, planning to go true dual. Anyone content with Mangaflow?)

Besides that I have $1500 I would also like to throw into the car.

What would be the best parts to replace for suspension and steering? Springs, shocks, and alignment have been mentioned, bushings?
Also is there any general parts I should just replace? I was thinking of replacing all the calipers and new brake pads, feel safer knowing there new.
Its a daily car. A general list of what to look/get would be awesome.

Last edited by MattCC81; Sep 16, 2011 at 12:44 AM.
Reply
Old Sep 15, 2011 | 11:12 PM
  #2  
terry82's Avatar
terry82
Le Mans Master
25 Year Member
 
Joined: Jul 2000
Posts: 6,664
Likes: 162
From: columbia city in
Default

if you have metal springs in the rear ,change to the fiberglass spring .you may need new shocks.
Reply
Old Sep 15, 2011 | 11:54 PM
  #3  
billla's Avatar
billla
Le Mans Master
Supporting Lifetime
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
Default

I would spend a little time doing a full inspection of the suspension. Many C3s are pretty tired...and just putting on upgrades when the suspension is basically shot doesn't really help. Build on a good foundation.

If the suspension is in basically good shape, then an alignment - front and rear - is job one. You'll need to find a shop that knows about C3s. Then it's shocks and springs.

Just a note - if you dig into the rear suspension, bring money I have yet tear into one of these where we didn't end up at the bare frame rails by the time we had everything out that needed work...
Reply
Old Sep 16, 2011 | 12:48 AM
  #4  
MattCC81's Avatar
MattCC81
Thread Starter
Instructor
 
Joined: Apr 2011
Posts: 121
Likes: 0
Default

Thanks, I honestly dont think I would be able to do the whole suspension. I'm actually very young and don't have much time or money to throw into it.
Reply
Old Sep 16, 2011 | 01:25 AM
  #5  
Peterbuilt's Avatar
Peterbuilt
Le Mans Master
15 Year Member
 
Joined: Aug 2006
Posts: 7,421
Likes: 1,558
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Default It's great to be young!

The exhaust it a personal choice, how quiet or loud depends on what you like and that can take up a few of that $1500.
An alignment shop can tell you if the bushings or ball joints are in need of replacement and you can spend some money on replacing a worn steering box.
How many miles on your Vette and what is new and what has been replaced?
Front wheel bearings are a DIY project but how are the rear bearings and bushings?
Drive your Vette for a while and see what may need attention now and see what may need replacing in the near or distant future before you blow the whole $1500.
Reply
Old Sep 16, 2011 | 01:36 AM
  #6  
MattCC81's Avatar
MattCC81
Thread Starter
Instructor
 
Joined: Apr 2011
Posts: 121
Likes: 0
Default

Originally Posted by petes74ttop
The exhaust it a personal choice, how quiet or loud depends on what you like and that can take up a few of that $1500.
An alignment shop can tell you if the bushings or ball joints are in need of replacement and you can spend some money on replacing a worn steering box.
How many miles on your Vette and what is new and what has been replaced?
Front wheel bearings are a DIY project but how are the rear bearings and bushings?
Drive your Vette for a while and see what may need attention now and see what may need replacing in the near or distant future before you blow the whole $1500.
The money I set aside for the exhaust wont touch the 1500, it has about 85k miles, replaced transmission th350, carb, intake, headers, cam, that is all I have done to it. The owner before me just left it in its garage, besides that the car is very bouncy and shaky on bumps, and I have loose play in my steering wheel... The car most diff needs an alignment.
Reply
Old Sep 16, 2011 | 01:58 AM
  #7  
Peterbuilt's Avatar
Peterbuilt
Le Mans Master
15 Year Member
 
Joined: Aug 2006
Posts: 7,421
Likes: 1,558
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Default

Your symptoms could be caused from anything from a bad rag joint to totally worn out suspension parts, take your time and try to diagnose everything one part at a time.
How old are your shocks?
Reply
Old Sep 16, 2011 | 09:38 AM
  #8  
81pilot's Avatar
81pilot
Drifting
 
Joined: Aug 2009
Posts: 1,635
Likes: 8
From: Enid Oklahoma
Default

Originally Posted by terry82
if you have metal springs in the rear ,change to the fiberglass spring .you may need new shocks.
Why? I have the FE7 suspension and would not ever go to a softer glass spring. Some like them some don't not a one size fits all deal.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-1

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-2

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-3

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-4

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-5

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-6

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-7

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-8

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-9

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
Old Sep 16, 2011 | 09:39 AM
  #9  
81pilot's Avatar
81pilot
Drifting
 
Joined: Aug 2009
Posts: 1,635
Likes: 8
From: Enid Oklahoma
Default

Do the duals next, so you can benefit from the other mods. As far as Magnaflow, ehh, some like em, I don't. I have true duals with chambers, no mufflers.
Reply
Old Sep 16, 2011 | 11:12 AM
  #10  
terry82's Avatar
terry82
Le Mans Master
25 Year Member
 
Joined: Jul 2000
Posts: 6,664
Likes: 162
From: columbia city in
Default

Originally Posted by 81pilot
Why? I have the FE7 suspension and would not ever go to a softer glass spring. Some like them some don't not a one size fits all deal.
if your happy with what you have ,that is good.this person is asking for suggestions.i think on a street car the fiberglass is by far better .better ride and less weight.gm also must think its better .all rear corvette springs have been fiberglass since the 82.
Reply
Old Sep 16, 2011 | 11:48 AM
  #11  
81pilot's Avatar
81pilot
Drifting
 
Joined: Aug 2009
Posts: 1,635
Likes: 8
From: Enid Oklahoma
Default

They had fiberglass in 81 as well, it was the first year for them. The FE7 Gymkhana suspension was an option. I do not think that the fiberglass spring is better on a street car especially the way I like to turn corners. Heck my other ride is a 4X4 offroad truck or motorcycle so comfort is relative. :O) But the option also came with a rear sway bar and beefier front bar and 550 lb front springs. So He may already have the glass rear spring if he does not have the Gymkhana suspension package.
Reply
Old Sep 16, 2011 | 12:09 PM
  #12  
terry82's Avatar
terry82
Le Mans Master
25 Year Member
 
Joined: Jul 2000
Posts: 6,664
Likes: 162
From: columbia city in
Default

verry good, now that you have won.i will let you help this poster from now on.
Reply
Old Sep 16, 2011 | 01:57 PM
  #13  
81pilot's Avatar
81pilot
Drifting
 
Joined: Aug 2009
Posts: 1,635
Likes: 8
From: Enid Oklahoma
Default

Originally Posted by terry82
verry good, now that you have won.i will let you help this poster from now on.
Its not Win or Lose, it is all about information. If my information can add to yours and help the OP make his OWN decision then it was a good thing, thats what forums should be about. But your original post simply stated he should get a new rear spring, I simply stated he may not and why, is that wrong? Some people make me
Reply
Old Sep 16, 2011 | 07:10 PM
  #14  
Tim81's Avatar
Tim81
Burning Brakes
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Aug 2006
Posts: 1,058
Likes: 27
From: Eastern North Carolina
Default

He said it had a TH350 auto trans. so more then likely it has a fiberglass rear spring. As far as mufflers I have shorty headers with true duals on my 81 and stock mufflers and love the sound. At first I had a set of Flowpro mufflers but they were too loud and sounded like a truck going down the street IMO. Some like em loud and some don't. I must be getting OLD
Reply
Old Sep 16, 2011 | 09:35 PM
  #15  
scottyp99's Avatar
scottyp99
Le Mans Master
15 Year Member
 
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
Default

This is the exhaust I have had on my 1980 'vette for the last 3 years, I'm pretty happy with it, and it's only 629 bucks.

http://www.corvettecentralexhaust.co...mance_dual.php


Scott
Reply
Old Sep 17, 2011 | 10:13 AM
  #16  
81pilot's Avatar
81pilot
Drifting
 
Joined: Aug 2009
Posts: 1,635
Likes: 8
From: Enid Oklahoma
Default

The transmission has no bearing on whether or not it has the gymkhana steel spring, mine is an automatic with it.
Reply
Old Sep 17, 2011 | 10:30 AM
  #17  
MN80Vette's Avatar
MN80Vette
Drifting
15 Year Member
 
Joined: Sep 2006
Posts: 1,986
Likes: 21
From: Columbus MN
Default

Originally Posted by Tim81
He said it had a TH350 auto trans. so more then likely it has a fiberglass rear spring. As far as mufflers I have shorty headers with true duals on my 81 and stock mufflers and love the sound. At first I had a set of Flowpro mufflers but they were too loud and sounded like a truck going down the street IMO. Some like em loud and some don't. I must be getting OLD
I had FloPro mufflers with true dual too. They were too loud for us, but other people thought I should get louder mufflers. Yes, we are getting old. My wife and I like to carry on a conversation at any speed.

I just finished a homemade mandrel-bent 2.5" exhaust with Magnaflow mufflers for about $800 including a little help hanging the mufflers from my local exhaust shop. PERFECT. I just posted a thread with pictures a couple of days ago on the General section. We are heading to our son's house in a few minutes to get a video so you can hear it.
Reply

Get notified of new replies

To 81 Upgrades?





All times are GMT -4. The time now is 04:27 PM.

story-0
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-1
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-2
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-3
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-4
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-5
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-6
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-7
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-8
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-9
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE