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Topic: Spring rates & drop - FYI (Read 17309 times) previous topic - next topic

Spring rates & drop - FYI

I stole this from somewhere - the front springs information should be applicable to our cars since '94-'04 are similar weight. The rear spring info is for informational purposes only as they are too short for our heavy rear cars!

11.96 @ 118 MPH old 306 KB; 428W coming soon.

Spring rates & drop - FYI

Reply #1
Quote
'94-'04 are similar weight.
If only it was that easy.
The chart doesn't mention the springs' heights (installed or not).
Eg: Putting in a 500lb 18" won't lower a car that originally had a 500lb 15" installed.
Death awaits you all with nasty, big, pointy teeth.

1988 5.0 Bird, mostly stock, partly not, now gone to T-Bird heaven.
1990 Volvo 740GL. 114 tire-shredding horsies, baby!

Spring rates & drop - FYI

Reply #2
nice table. all the spring rate numbers i know off the top of my head look right, but i still wonder what sources they used to compile the info.

AFAIK the KB rates werent published anyplace, and i never heard them give an answer when asked outright. the front drop wasnt 2" either, more like 1.5"
gumby - beauty may fade, but stupid is forever!

Spring rates & drop - FYI

Reply #3
Quote from: MasterBlaster;178036
If only it was that easy.
The chart doesn't mention the springs' heights (installed or not).
Eg: Putting in a 500lb 18" won't lower a car that originally had a 500lb 15" installed.


I should have mentioned that these would be V8 to V8 and reported drops on a SN95 Mustang. Drops may be similar on Fox V8 vehicles based on extensive research here and on CoolCats. I'll be reporting back on the Mach1 springs when I get them this Friday.
11.96 @ 118 MPH old 306 KB; 428W coming soon.

Spring rates & drop - FYI

Reply #4
I don't know what rates came stock, but replacement Moog shocks are 249 lbs/in. Cargo coils are 340 lbs/in.

Stock wheel rates are about 20% stiffer in the rear.

Spring rates & drop - FYI

Reply #5
Quote from: JeremyB;178074
I don't know what rates came stock, but replacement Moog shocks are 249 lbs/in. Cargo coils are 340 lbs/in.

Stock wheel rates are about 20% stiffer in the rear.


I said I was talking about front only - the rears are for informational purposes only!

I thought everyone understood that the Mustang rears are too short and bind up early.
11.96 @ 118 MPH old 306 KB; 428W coming soon.

Spring rates & drop - FYI

Reply #6
Aye, I missed that part. I thought that would be in the title.

Spring rates & drop - FYI

Reply #7
Quote from: JeremyB;178154
Aye, I missed that part. I thought that would be in the title.


That's OK - I'm used to people yelling at me without having even read the entire post - lol :hick:

BTW, I have an Excel spreadsheet that I made that picture from and I will be updating it as I receive more information. Your photochop is appreciated but will be superceded in the future. Also, I edited the O/P to make it clear that the rears are for informational purposes only. I won't be removing the rears info as some folks like me who are using adjustable rear lower control arms may still want to experiment with the shorter springs (i.e. - I can't get the fenders closer than 3.5" from the tops of the tires now!)
11.96 @ 118 MPH old 306 KB; 428W coming soon.

Spring rates & drop - FYI

Reply #8
Quote from: Cougar5.0;178309
That's OK - I'm used to people yelling at me without having even read the entire post - lol :hick:

Yeah, that's what I get when I try to apply presentation standards from work to internet forums. :(

Graphics normally convey the main point of a slide (or post in this case), the text is complimentary. I still should have caught it. I'm turning to the person I made fun of when I started working.

Spring rates & drop - FYI

Reply #9
The "real" info that chart is also missing (aside from the heights) is load ratings. 

It is a good listing though.
Long live the 4-eyes!  - '83 Tbird Turbo

Spring rates & drop - FYI

Reply #10
Quote from: Chuck W;178315
The "real" info that chart is also missing (aside from the heights) is load ratings. 

It is a good listing though.


Yep, true - I was planning on adding columns for that later though at this point I am only aware of a few of the ratings - if you know of a place to find this info, let me know. Once again, the fronts are mostly similar so there is definite useful info there either way. The rears are another story.
11.96 @ 118 MPH old 306 KB; 428W coming soon.


Spring rates & drop - FYI

Reply #12
Can I run Fox body Mustang Coil Overs in my TC.

Spring rates & drop - FYI

Reply #13
so, what exactly do you do for rear springs then.  I'm thinking of getting some stiffer springs for autox, and almost bought the motorsport c springs till I found this

88 t-bird tc - 14.97 @ 90  IHI 18 psi + k+n filter...so far - NOW HX-35 @25psi - 12.75@112    348rwhp/395rwtq
78 F-150 - 11.61@120 on 175shot N20 - 12.55@110 on motor - 5200# race weight:hick:

Spring rates & drop - FYI

Reply #14
I'm following Kingcars lead and will hopefully be installing my front springs this week....or next week at the latest....I hope. I really am tired of the 4x4 look up front. For the fun of it,I'll measure the distance between the tire and fender.I think it's about 2 feet.LOL.
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..