Looks good dude! Looking forward to getting out on the trail this year!
CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.
Here I go
- Thread starter Chevk587
- Start date
-
- Tags
- 383 coilovers tire carrier
Got a lot done today let’s talk spring rates ??? So at full droop set my zero preload dropped it all down and it looks like I’m about 3in above my ride height . I’m using a 250 16” spring and a 300 16in spring for a combined spring rate of 136 . I’m thinking of getting a 14” 250 and going 250 over 250 with a combined spring rate of 125 that way I’ll get 2” lower and should have enough drop to set a decent amount of preload. Any thoughts ?
also got my grille in and a lot of the tubes in I’m loving it ! Also got the bumps stops in .
also got my grille in and a lot of the tubes in I’m loving it ! Also got the bumps stops in .
It’s looking great! I haven’t had to experiment with rates and spring height, yet, but your plan makes sense to me. Fortunately, springs are relatively inexpensive. I’m running 350/400, and it set down at zero preload almost 1-1/2” lower than my target.
There’s a combo that will work.
David
There’s a combo that will work.
David
Don’t run shorter springs. Run what your shock is meant for. You just need to find the correct rate for the ride height you want with 1-3” of preload. If you measure how much your existing spring is compressing you can figure out your sprung weight and adjust from that. Filthy Motorsports has some great info and calculators on that stuff. For reference, my blazer is heavy and I’m running 250 over 350 and @Desert_K5 Rig is light running 200 over 250.
What is the issue with running a shorter spring? Just curious?
I’m definitely not an expert on this, you may be able to but you could run into coil bind.
Don't do anything with the springs until the truck is 100% completed.
For now adjust your preload or do what you need to to get the truck at the height you want to continue building at.
Once you get the truck finished, then you'll use those existing springs to calculate what springs you actually need with the correct preload and nitrogen charge.
Oh yeah, you don't want shorter springs, you want to reduce ride height with spring rate like you said. You want a 14 over 16.
For now adjust your preload or do what you need to to get the truck at the height you want to continue building at.
Once you get the truck finished, then you'll use those existing springs to calculate what springs you actually need with the correct preload and nitrogen charge.
Oh yeah, you don't want shorter springs, you want to reduce ride height with spring rate like you said. You want a 14 over 16.
They’re 16x2.5
I know what you mean about about not doing anything until it’s done I will wait . There isn’t much more to do I’ve gotta get the battery in and a little more tube but I will wait . In my rear I’m running a 14over a 16 which I’m 99% sure I talked out with ORD .
Last edited:
Then disregard my spring lengths. @Fastereddie asked the right question and I typed before asking in a rush. But you get the idea. You want 16/18 for 16" length for 90% of the applications and most likely this is what you'll use.
Ok so I watched a few vids on how to calculate the spring rates I did the math using the dual spring rate of 136 (250 over 300 ) and had a drop of 6” . 6x136=816 lbs per corner seems light to me but maybe not .
when I set my ride height I wanted to set my shock to have 7” up travel and 9 down .
Next I divided 816 by the amount of shock I wanted showing @ ride height . 16-7=9” of drop. Next I took 816 \ 9 = 90.6 so if my calculations are correct in order for me to reach my desired ride height I need a combined spring rate of 90? Seems light thoughts ?
when I set my ride height I wanted to set my shock to have 7” up travel and 9 down .
Next I divided 816 by the amount of shock I wanted showing @ ride height . 16-7=9” of drop. Next I took 816 \ 9 = 90.6 so if my calculations are correct in order for me to reach my desired ride height I need a combined spring rate of 90? Seems light thoughts ?
You forgot to calculate preload. You want preload on the springs.
Is the radiator mounted? Engine full of fluids? Exhaust completed? All wiring done? Battery, lights, etc.... Are you sitting in the truck? Dashboard in it? Interior? Etc. That stuff all adds up very fast to lots of pounds. Is the truck level, rear suspension completed, driveshafts? etc.. Wait until she's all done.
Is the radiator mounted? Engine full of fluids? Exhaust completed? All wiring done? Battery, lights, etc.... Are you sitting in the truck? Dashboard in it? Interior? Etc. That stuff all adds up very fast to lots of pounds. Is the truck level, rear suspension completed, driveshafts? etc.. Wait until she's all done.
Sounds like your on the right track. I think 90 sounds too light also. There are a few variables that can skew your measurements. Instead of using both springs to get your weight, just use your lower spring and run your secondary stop rings all the way down to stop the slider. and that will eliminate any friction of the slider etc. also do you have nitrogen in it? If not that could throw it off too. I’ll be honest, I’ve changed springs 3 times getting it right where I wanted it.
Starting down that road myself lol . Ok I’ll wait till it’s all done then go from there appreciate your guys input thank you !
Over two months and no updates?
bump!
bump!
I know what a loser I’ll post up later lol 
Shakedown run @ Prairie City yesterday
She flexy
She flexy
