I started a thread in "General" regarding my upcoming JKU build. 2013 JK unlimited sport.
It's going to be simple, cheap and very effective. I read through that dumb ass JK-Forum thread about the stock spring part numbers and was losing my mind. It's the same question or statements 200 times. I am posting this here because I only want to go over this exact topic.
So I want to fine tune, or dial in my suspension using different spring rates. I am going to use OEM coils from whole sale mopar. They are significantly cheaper than other springs. I will fine tune the height with coil spacers from either Teraflex or Synergy.
I am looking for a very good offroad ride for spirited trail riding and mild desert-almost prerunner wannabe, based on the stock suspension.
My stock front springs are 17's and rears are 58's. Typically people are just going to the stiffest part numbers, 19's front and 60's rear just for a slight lift. I want to select them based on my suspension performance, not height. Like I said, height (whether it sits level or not) will be fixed with spacers.
So it's my understanding for this, you want softer rear spring rates and stiffer front spring rates so the ass squats when you hit a jump or whoops. (not going to actually jump it)
In the Front I was thinking about going from the stock 17's to stiffer 19's. And in the rear, going from stock 58's to softer 56's. I can't find any info on what the numbers mean or if they actually represent anything at all, other than just being a part number. I also can't find info on how big a difference there is in spring rate (or perceived ride quality) from spring to spring. Such as front 17's to front 18's. How much difference?
I am not running any aftermarket bumpers or winch, and removing the spare tire/carrier. Jeep has a hardtop. My other concern is all the info I found was 90% 3.8L Jeeps and the 3.6L is slightly lighter. So perhaps I don't want to step up to a 19?
Shocks will be Bilstein 5100's with 255/70 valving all around. Unsprung weight will only increase due to larger/heavier tires. Going to run either 33" x 10" KM2's or 32" treadwrights. Stock 16" steelies.
I will be running Teraflex 2.5" Speed Bump kit. I am trying to do this on the cheap while coming out with a unique and effective build.
Can anyone help?