...

Go Back   Lateral-g Forums > Technical Discussions > Chassis and Suspension
User Name
Password



Reply
 
Thread Tools Display Modes
  #1  
Old 01-30-2023, 11:09 AM
Perry Mitchell Perry Mitchell is offline
Senior Member
 
Join Date: Nov 2006
Posts: 121
Thanks: 1
Thanked 8 Times in 5 Posts
Default Coil over spring rates

I have coilover shocks on all four corners of my 67 Camaro. I think that the shocks need a different spring rate as they are very stiff. I wanted to raise the car 1 inch in the rear, but turning the adjusters up, the spring seems to get in a bind, yet, the car does not raise. Springs that are on the car now are a variable rate style with a rating of 175/350. There are two batteries and a large, heavy fuel cell in the trunk. Any suggestions?
Reply With Quote
  #2  
Old 01-30-2023, 10:42 PM
Tinker's Avatar
Tinker Tinker is offline
Lateral-g Supporting Member
 
Join Date: Apr 2009
Location: Wisconsin
Posts: 259
Thanks: 94
Thanked 69 Times in 45 Posts
Default

Is it the area of the spring, where it would be the 175 lb rate?(coils are closer spaced at free length)
It will probably stack all the lighter coils before raising the car, giving you essentially a 350 lb spring and probably a rough ride.
I am assuming this because 175 lb seems fairly light. I know I ran 225 lb on my 69 Firebird and will be switching to 275's when I get it back out.(someday lol)
__________________
Chris
1969 Firebird: injected Pontiac 462ci, T56
Reply With Quote
  #3  
Old 01-31-2023, 11:57 AM
Perry Mitchell Perry Mitchell is offline
Senior Member
 
Join Date: Nov 2006
Posts: 121
Thanks: 1
Thanked 8 Times in 5 Posts
Default

Yes, it is the lower half of the springs where the coils bind up. This leaves the upper portion of the spring with less travel to do the suspension work. I talked to QA one and explained my situation. He said the variable rate spring isnít the right choice for my car. He said with the Corvette IRS suspension, dual batteries, heavy fuel cell, and Dynamat, a 400 pound spring would be more suitable. We will see.
Reply With Quote
  #4  
Old 01-31-2023, 01:34 PM
Tinker's Avatar
Tinker Tinker is offline
Lateral-g Supporting Member
 
Join Date: Apr 2009
Location: Wisconsin
Posts: 259
Thanks: 94
Thanked 69 Times in 45 Posts
Default

I didn't know you were running IRS. Cool!
My spring rates were for 4 link rear. Hope you got it sorted out.
__________________
Chris
1969 Firebird: injected Pontiac 462ci, T56
Reply With Quote
  #5  
Old 01-31-2023, 07:44 PM
dhutton dhutton is online now
Senior Member
 
Join Date: Nov 2006
Location: Mountain Springs, Texas
Posts: 1,831
Thanks: 926
Thanked 398 Times in 223 Posts
Default

Quote:
Originally Posted by Perry Mitchell View Post
I have coilover shocks on all four corners of my 67 Camaro. I think that the shocks need a different spring rate as they are very stiff. I wanted to raise the car 1 inch in the rear, but turning the adjusters up, the spring seems to get in a bind, yet, the car does not raise. Springs that are on the car now are a variable rate style with a rating of 175/350. There are two batteries and a large, heavy fuel cell in the trunk. Any suggestions?
Are the coilover shocks fully extended? Coilover shocks need to be roughly centered in their travel at ride height.

Don
Reply With Quote
The Following 2 Users Say Thank You to dhutton For This Useful Post:
Goosesdad (02-28-2023), jarhead (02-28-2023)
  #6  
Old 01-31-2023, 08:53 PM
Perry Mitchell Perry Mitchell is offline
Senior Member
 
Join Date: Nov 2006
Posts: 121
Thanks: 1
Thanked 8 Times in 5 Posts
Default

Don. Yes, the shocks at ride height are in the middle of their travel.
Reply With Quote
The Following User Says Thank You to Perry Mitchell For This Useful Post:
dhutton (02-01-2023)
  #7  
Old 02-27-2023, 11:04 PM
David Pozzi's Avatar
David Pozzi David Pozzi is offline
Senior Member
 
Join Date: Sep 2005
Posts: 568
Thanks: 2
Thanked 57 Times in 20 Posts
Default

You could run as high as 600 - 700 lbs. 400 to 500 would be on the soft side
__________________
http://www.PozziRacing.com
Reply With Quote
The Following 2 Users Say Thank You to David Pozzi For This Useful Post:
camcojb (02-28-2023), Goosesdad (02-28-2023)
Reply

Thread Tools
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 Off

Forum Jump


All times are GMT -5. The time now is 02:28 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2023, vBulletin Solutions Inc.
Copyright Lateral-g.net