Coil spring question?

bronc67 · Feb 2, 2011

I got a '67 bronco and im tryin 4 link the rear of it with coil springs. So my question is what coil springs should I use or what spring rate would be suitable. There is basically nothing in the back of it but roll cage and a fuel tank, the bed and all that is cut out. Oh and the rear axle is a ford 9. Thanks

zukkev · Feb 2, 2011

Really need to know the weight of the rear of your rig, and its intended use before anyone can recommend anything...even then it's still a guess-as one's suggestion may be too soft, and the next not soft enough...

Damnyankee · Feb 2, 2011

hell, id start with some Heep coils, as its similar size, weight.. ect.
if they are too soft, get some progressive rate U100 coils

bronc67 · Feb 2, 2011

Gotcha. Well thanks, I was lookin at some Heep TJ rear coils and thinkin about tryin those out. So, maybe I'll give that a shot.

JesterFab · Feb 2, 2011

xj rear coils

I used 6" lift XJ coild on my toyota truggy. It flexed very well for just guessing on the coils, all i had was cage and gas tank right behind cab. I would definately start there. Should work very well. Also is it strictly offroad, or both. That may make a difference in choics. May want a stabilizer bar if using it on the street.

boardbysled · Feb 2, 2011

Since I kinda ****ed up this thread, I'll add some tech.

You can get your spring rate dialed in, here is a chart telling you how to calculate a spring rate of both a coil and a leaf spring.

180518_188261487860993_100000314301973_510825_6335305_n.jpg

Damnyankee · Feb 2, 2011

Lamar said:
Dear Damnyankee;
Our friend, Bronc67 is making a serious inquiry, therefore why don't you backyard mechanics back off of from this topic and let a professional take care of things? Thank you.
Your friend;
LAMAR

this makes it hard not to bite.

bronk67, sorry for the hijack.
the xj idea isn't bad, but if you don't have a cage, or run a hard top.. i think they may be too stiff, but worth a try if you can get a free or cheap set
:beer:

bronc67 · Feb 2, 2011

Alright well I appreciate all the responses relevant or not:redneck:. Thanks for the chart boardbysled. I think I'm gonna give the TJ's a try I got a buddy who's got a set, at least that will be a starting point.