Spring rates
 

Lots of discussion on what drop springs will get folks to the level they want but with all the various combos of trucks from 63 to 72 from long bed to short bed to burb the rear weights are all over the map. Then ad moving the fuel tank to the back and other mods a 2" spring in one truck could result in 3" in another. Could we build a list of springs from the suppliers that have been checked for the rate? I have a local circle track racer with a spring checker and will check what I have here and when I get stuff. If you have checked any or have information about ones that have been checked please ad the information. I think will help the burb guys also giving an idea of what will work using truck springs.
Thoughts?
Jimmy

Re: Spring rates
 

This is for both front and rear springs.
Jimmy

Re: Spring rates
 

What, an attempt to actually engineer rather than use trial-and-error? What a concept. I tried the same thing and in short I still had to repeatedly change springs before I was happy with the whole setup. The problem is that what is sold on the aftermarket is not what you expect (sound familiar?). The larger variable is the truck you are working on.

I called several suppliers and they knew ONLY what was posted in thier catalog. When asked about spring rates, free length, coil diameter, etc. they did not know and were unwilling to find out. It was clear they were just selling someone else's product. Customer service was not in their business plan. The exception to this was Eaton Detroit Spring, who manufactures their own springs. Here is some data I compiled. As you say, maybe others can add more data from first-hand experience.

The truck you are working on is invariably different from everyone else's. There are so many variables that factor into ride height- wheelbase, body style, engine/trans, aftermarket modifications, 1/2 or 3/4 ton, mileage, usage (or rather abusive usage), etc. Wheel/tire combination is another world.

So as stated earlier, this "engineering data" got me started. Before it was perfect I still had to do some trial and error with before/after measurements before I was done.

Re: Spring rates
 

Very good info. That's the kind of information I would like to see posted. I have a couple of Springs to check once all this snow and ice goes away. This info would make it much easier to help folks with lowering plans and issues.
Jimmy

Re: Spring rates
 

Got this info from Beltech today. Got a Burb coming and trying to plan for the drop. Ads a good bit to the list.
Jimmy
Thank you for contacting Belltech. The requested information for the 65 C-10 is listed below

Front springs
#4700
Rate 1100 lbs/in
Free length 12.11"

#4702
Rate 1100 lbs/in
Free length 11.61"

Rear springs
#5352
Rate 260 lbs/in
Free length 12.01"

#5353
Rate 260 lbs/in
Free length 11.01"

#5355
Rate 260 lbs/in
Free length 9.01"

Re: Spring rates
 

Got some info from Eibach today. There C10 3 and 4 inch drop rear springs are 257 pounds per inch.
Jimmy

Re: Spring rates
 

Was doing some spring research & came across this thread from years ago so I thought I'd bring it back up so it's easier to find.

Lets see if anyone has new info to share.

Re: Spring rates
 

Want to add verable most have no idea of. Asking for part for Panel. While simular to suburban. It is lighter,No rear seats,no thirs door and hardware and no side windown. At same time weights more than truck with added wieght behind the axle. Moving tank back 12" and adding battgery weight to rear while rempoving 50 lbs off nose.

Guess can say price you pay for being different

Re: Spring rates
 

Some info on Moog front coils. These are stock replacements.


Part# Application Weight Wire dia
6082 Standard 722 lb/in .75

6102 Heavy 1015 lb/in .81

6452 843 lb/in .78

6454 1060 lb/in .82

6104 1016 lb/in .81