Mine is 14 front and rear with 5.5" up on both ends. No cutting the hood or the tub. 200 - 300 springs on both ends as the weight with the 103 wheelbase is 100 lbs lighter in the rear than the front. Perfect ride and feel for me
Everyone to post here has their rates backwards.
No offense, its a very common misconception to go with lighter rates in the rear, and is accpetable for PURE crawlers.
For what we do, onroad/offroad, trail riding, hill climbing, technical crawling, etc etc, you want a slightly higher rate in the rear.
Some express it as a ratio compared to the front.
For example, a ratio of 1.2 would look as follows.
Front combined rate of 100 x 1.2 = 120lbs/inch rear rate.
Baja commonly uses a 1.6 ratio.
Pure crawlers use around 0.90
KOH and and other mixed application crowd favor something in the middle around 1.2
So take inlines front rate of 350/225 and calc the combined rate.
350 x 225
350 + 225
Multiply x 1.2 for the rear comes to 164.34
Now you essentially experiment with numbers until your get your desired rate, of a close approximation of it.
Lets try 375/275
I get 158.65 lbs/inch
You can fine tune from there.
Once you have that dialed in, you want to valve your rear shocks slightly lower then your front. Unless you have a perfect 50/50 bias, then you could leave them equal.
The softer valving will help with smother running over mid and high speed terrain, but the higher spring weight will support weight transitions better.
When we climb, hit whoops, accell on corner, so much weight is tranfered to the rear of the vehicle. The additional spring rate back there helps compansate for that weight transfer.
Thats why the Baja run such a high ratio. If they didnt, the back end would sink to hard every time they went into a whoop, and then the front end would lurch forward after. Basically turning the truck into a bucking bronco.
If you make those subtle changes to your set up, you will feel a noticeable difference in handling and performance.
Just as an example, when my good freind competed at KOH, he had a tuning day with King. He runs a 1.2 spring ratio, and equal valving front and rear.
All king did was dial down the rear valving by about 1 setting, and Joey grabbed about 10-15mph more through the same section.
Essentially this is the basics of a good all around setup.