03-13-2006, 06:14 AM
Here is some of the factory specs for springs on the rear of our cars based on TRW factory replacments.... more to come...
83-88 Ford Thunderbird Turbo Coupe (Rear)
Internal Dia: 4.01†Bar Dia: .593â€
Free Height: 13.33†Spring Rate: 249 lbs/in
Load Rating: 830 lbs. Load Height: 10.0â€
79-95 Mustang GT Coupe/Convertible (Rear)
Internal Dia: 4.03†Bar Dia: .541â€
Free Height: 13.57†Spring Rate: 174 lbs/in
Load Rating: 650 lbs. Load Height: 9.63â€
78-86 LTD/Fairmont/Granada V8 (Rear)
Internal Dia: 4.01†Bar Dia: .61â€
Free Height: 12.44†Spring Rate: 275 lbs/in
Load Rating: 875 lbs. Load Height: 9.25â€
78-86 LTD/Fairmont/Marquis L4 (Rear)
Internal Dia: 4.02†Bar Dia: .565â€
Free Height: 12.75†Spring Rate: 224 lbs/in
Load Rating: 726 lbs. Load Height: 9.5â€
Here are some of the fronts....
83-88 Ford Thunderbird Turbo Coupe (Front)
Internal Dia: 3.5†Bar Dia: .64â€
Free Height: 15.19†Spring Rate: 415 lbs/in
Load Rating: 1740 lbs. Load Height: 11â€
79-93 Mustang L4 (Front)
Internal Dia: 3.5†Bar Dia: .625â€
Free Height: 14.94†Spring Rate: 383 lbs/in
Load Rating: 1500 lbs. Load Height: 11â€
79-93 Mustang GT (Front)
Internal Dia: 3.5†Bar Dia: .64â€
Free Height: 15.0†Spring Rate: 415 lbs/in
Load Rating: 1660 lbs. Load Height: 11â€
78-86 LTD/Fairmont/Granada V8 (Front)
Internal Dia: 3.5†Bar Dia: .625â€
Free Height: 15.13†Spring Rate: 383 lbs/in
Load Rating: 1580 lbs. Load Height: 11â€
78-86 LTD/Fairmont/Granada L4 (Front)
Internal Dia: 3.5†Bar Dia: .625â€
Free Height: 14.94†Spring Rate: 383 lbs/in
Load Rating: 1500 lbs. Load Height: 11â€
Here is a link for more information on springs.
http://www.miracerros.com/mustang/springs_calcs.htm
http://www.afcoracing.com/tech_pages/spring.shtml
83-88 Ford Thunderbird Turbo Coupe (Rear)
Internal Dia: 4.01†Bar Dia: .593â€
Free Height: 13.33†Spring Rate: 249 lbs/in
Load Rating: 830 lbs. Load Height: 10.0â€
79-95 Mustang GT Coupe/Convertible (Rear)
Internal Dia: 4.03†Bar Dia: .541â€
Free Height: 13.57†Spring Rate: 174 lbs/in
Load Rating: 650 lbs. Load Height: 9.63â€
78-86 LTD/Fairmont/Granada V8 (Rear)
Internal Dia: 4.01†Bar Dia: .61â€
Free Height: 12.44†Spring Rate: 275 lbs/in
Load Rating: 875 lbs. Load Height: 9.25â€
78-86 LTD/Fairmont/Marquis L4 (Rear)
Internal Dia: 4.02†Bar Dia: .565â€
Free Height: 12.75†Spring Rate: 224 lbs/in
Load Rating: 726 lbs. Load Height: 9.5â€
Here are some of the fronts....
83-88 Ford Thunderbird Turbo Coupe (Front)
Internal Dia: 3.5†Bar Dia: .64â€
Free Height: 15.19†Spring Rate: 415 lbs/in
Load Rating: 1740 lbs. Load Height: 11â€
79-93 Mustang L4 (Front)
Internal Dia: 3.5†Bar Dia: .625â€
Free Height: 14.94†Spring Rate: 383 lbs/in
Load Rating: 1500 lbs. Load Height: 11â€
79-93 Mustang GT (Front)
Internal Dia: 3.5†Bar Dia: .64â€
Free Height: 15.0†Spring Rate: 415 lbs/in
Load Rating: 1660 lbs. Load Height: 11â€
78-86 LTD/Fairmont/Granada V8 (Front)
Internal Dia: 3.5†Bar Dia: .625â€
Free Height: 15.13†Spring Rate: 383 lbs/in
Load Rating: 1580 lbs. Load Height: 11â€
78-86 LTD/Fairmont/Granada L4 (Front)
Internal Dia: 3.5†Bar Dia: .625â€
Free Height: 14.94†Spring Rate: 383 lbs/in
Load Rating: 1500 lbs. Load Height: 11â€
Here is a link for more information on springs.
http://www.miracerros.com/mustang/springs_calcs.htm
http://www.afcoracing.com/tech_pages/spring.shtml