Moparchat - Home of MOPAR enthusiasts worldwide!



Go Back   Moparchat - Home of MOPAR enthusiasts worldwide! > Technical Forums > Performance Talk

Click here to search for Mopar cars and parts for sale.


Reply
 
Thread Tools Display Modes
  #1  
Old 11-21-2004, 05:39 PM
JussBob JussBob is offline
This account disabled due to bad email address!
 
Join Date: Jan 2003
Location: McHenry IL
Posts: 23
Default 3600 lb S/S Springs on 68 B Body

I need some info on installing S/S springs on my 68 RR. I want to get the 3600 lb springs because I don't want the rear setting up too high, but the rear shackles need to be relocated. Can anyone tell me whats involved in relocating the shackles, and where do they get relocated to? Can I use the stock shackles or will I need different ones? Any tips and info will be greatly appreciated.
Thanks, Bob
Reply With Quote
  #2  
Old 11-21-2004, 08:45 PM
dwc43's Avatar
dwc43 dwc43 is offline
Banned
 
Join Date: Sep 2002
Location: Shelbyville,Tn.
Age: 54
Posts: 23,987
Biggrin

You can't use the 3600 lb springs cause the car weighs too much. You need the 3800 lb springs for proper height and handling. YOu don't need to relocate the shackles at all. The stock ones are fine. You do the the front spring hanger extension which is two inches longer than yours. These springs are based of the A body and are two inches shorter on the front segment of hte main spring, so that's why you need the hanger.
Reply With Quote
  #3  
Old 11-21-2004, 11:10 PM
rumblefish360's Avatar
rumblefish360 rumblefish360 is offline
Moparchat Bronze member
 
Join Date: May 2000
Location: C
Age: 57
Posts: 11,120
Default

Wrong bro, Some where in this grey matter it says somewhere in the MoPar book to relocate the springs foward 1 inch I think it was. Redrill the hole through the frame. I'm sure of it.
I have not been down this road so I can not truly help in this area. You'll need the MoPar chassiss book to be sure what they want you to do. OR a been there done that guy.
Reply With Quote
  #4  
Old 11-22-2004, 08:42 AM
dwc43's Avatar
dwc43 dwc43 is offline
Banned
 
Join Date: Sep 2002
Location: Shelbyville,Tn.
Age: 54
Posts: 23,987
Biggrin

It's in the chasis book and it says to do that "IF" the rear shcakles are ever in a forward facing angle after it is lifted in the rear for more weight transfere. I've used as much as an 8" shackle and have yet to have to move a shackle mount. As long as they hang straight down or to the rear they are o.k.
Reply With Quote
  #5  
Old 11-23-2004, 12:28 AM
BelvedereII's Avatar
BelvedereII BelvedereII is offline
Inactive User
 
Join Date: Apr 2004
Location: Omaha Nebraska
Posts: 197
Default

I've cross-referenced the 2002 MP parts catalog with an old MP chassis book. All of the PN's in the 2002 catalog dial in at 125 lbs/in except the pro gas/Super gas bracked car set (PN's end in 863/864) and Original 1968 Hemi SS set (002/003) that both come in at 160 in/lb. Those last, plus several others, are listed as requiring rear shackle relocation for B-bodies.

I put the 3400lb car weight springs (456/457) on a '67 Barracuda and they took the shackle fully to the rear, must have been binding under heavy load and really tightened that car up, a 273/4v automatic ride.

On my '67 B-body I first installed the "OE" XHD set sold via the catalog. Sez "Lighter cars may sit higher than stock". 'Tweren't so for me. Measured the wheelwell trim at the center attaching screw and no change. Taking advice from a Mopar guru, I swapped them out for a pair of right-side springs, the P3690456, using the MP adaptors. The adaptors have two sets of holes drilled for the front eye bolt, starting with the top set I found ok pinion angle and the car sat at the same height. Switching to the lower set of holes, car went up maybe 1.5" and pinion angle is good. I didn't want my car to look jacked up, and it sits just right. Stiff springs they are, and my car with them and a small block/727 combination weighed right at 3500lbs on the local scale. Again, the catalog cross-referenced to the old Chassis manual shows the "3800lb" springs as having the same 125 in/lbs rate as the "3400lb" springs. Don't know if they're arched higher or what. Catalog says vehicle will not be level at standstill with S/S sets; despite both springs being "righties" with the same number of leaves instead of a right-side bias as in the sets, my car does tilt a bit. Mine are made in Mexico, so-marked.

My next step will likely be torsion bars. Originally a 318 car, mine leans a good bit in the turns. Haven't scraped off a mirror or door handle yet, and drag racing will be primary, but I'd like to take turns a BIT more smoothly!
Reply With Quote
  #6  
Old 11-23-2004, 08:35 AM
dwc43's Avatar
dwc43 dwc43 is offline
Banned
 
Join Date: Sep 2002
Location: Shelbyville,Tn.
Age: 54
Posts: 23,987
Biggrin

Here's the reason for the extra holes in the front mount. IF you use the upper hole and raise the rear of the car to stock height or more, you will gain more forward bite. Using the lower hole (closer to the road) will decrease forward bite or traction.

You need to run right and lefts. IT will effect handling and launches at the strip as well. I've never had to move that shackle on any car, yet. For proper handling stay soft on the springs and T bars, no more than one size up from stock, use large sway bars and an agressive shock package. Over the counter shocks just wont cut it.
Reply With Quote
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

Similar Threads
Thread Thread Starter Forum Replies Last Post
A Body springs pishta Performance Talk 6 11-12-2007 06:29 PM
75 B body springs Jhnybgd Performance Talk 3 11-10-2005 11:40 AM
a body springs JohnnyDees Performance Talk 14 01-16-2004 02:11 AM
SS Springs on E-Body Fly Boy Performance Talk 2 03-18-2001 08:18 PM
ss springs on a body 440don Performance Talk 1 01-17-2001 12:34 PM




All times are GMT -4. The time now is 03:58 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
. . . . .