Chevy Silverado and GMC Sierra Forum banner

Coilover adjustments

11K views 38 replies 5 participants last post by  ferraiolo1  
#1 ·
Over this past weekend, I installed some RC Vertex coilovers and rear Vertex shocks on my 17 Silverado. I originally had the stock strut and strut spacer that came with my Fabtech 6" lift. I found that when I put the new coilovers in, they dropped my truck around 1.5" down lower in the front. So, I had to adjust them to get it back up. I'm still about 1/4" lower then before, but my question is, if I keep cranking these coilovers for more lift, isnt my ride going to get stiffer ?
 
#5 ·
No it won't get stiffer. But you could run out of internal travel in the coil over itself which will equate to a poor ride. Contact rc and see if they know how much you can crank them.

For instance I know I can crank my cst coil overs 1full inch and still be within the internal travel limits. But no more.

Sent from my iPhone using Tapatalk
 
#6 ·
ferraiolo1 said:
No it won't get stiffer. But you could run out of internal travel in the coil over itself which will equate to a poor ride. Contact rc and see if they know how much you can crank them.

For instance I know I can crank my cst coil overs 1full inch and still be within the internal travel limits. But no more.

Sent from my iPhone using Tapatalk
Thanks, I will be calling them today for sure. I did measure the spacer i removed and its 7", but the kit is advertised as a 6" lift. Probably why I had to crank them up an inch.
 
#9 ·
Oh okay I understand now.

So you had just the factory struts and the fabtech spacer and then you just replaced the factory ones with the RC coilovers, gotcha.

I would have figured the coils would have come set at 2" though and you would actually be sitting nose high a tad, that's sort of odd.

Need to find out what they measure unloaded and take them out and go from there.
 
#10 ·
One would assume if you got coilover made for a 6" lift they wouldn't need to be adjusted up a lot, if at all to get 6" out of them. They should be longer overall.

At least that's how the CST coilovers are. If anything they are a hair longer since with the adjusting ring all the way up they were just a touch over what the strut spacers were.
 
#11 ·
Bradley21sanders said:
Oh okay I understand now.

So you had just the factory struts and the fabtech spacer and then you just replaced the factory ones with the RC coilovers, gotcha.

I would have figured the coils would have come set at 2" though and you would actually be sitting nose high a tad, that's sort of odd.

Need to find out what they measure unloaded and take them out and go from there.
So when I removed the old strut and spacer, I sat them next to the coilover on the floor and it was obvious they were much lower. The spacer is 7", so that is why i had to crank them. Rough Country says they come set up for there RC 6" lift, the Fabtech is a different drop.
 
#12 ·
OK, just talked to Fabtech and Rough Country.

RC says the coilovers come at there lowest setting to fit there 6" lift and in most cases have to be raised for other brand kits. They said even on there kit, sometimes it needs about 1/2" more to level the truck. I could crank them to 2" from stock and still be good.

Fabtech said even know they advertise the kit as a 6", its really a 7" lift when measuring the parts. They included a larger drop and the 7" spacer to make it easier to clear the 35" tires on these Chevy square wheel wells.
 
#14 ·
ferraiolo1 said:
No it won't get stiffer. But you could run out of internal travel in the coil over itself which will equate to a poor ride. Contact rc and see if they know how much you can crank them.

For instance I know I can crank my cst coil overs 1full inch and still be within the internal travel limits. But no more.

Sent from my iPhone using Tapatalk
what this guy said you don't have to worry about stiffness but travel.

Why not run the RC coils at 0" and leave the fabtech spacer in? One would think that a stock strut replacement ie. coilover at 0" would be a direct fit and you wouldn't have any problems? school me if im wrong..
 
#15 ·
Bradley21sanders said:
ferraiolo1 said:
No it won't get stiffer. But you could run out of internal travel in the coil over itself which will equate to a poor ride. Contact rc and see if they know how much you can crank them.

For instance I know I can crank my cst coil overs 1full inch and still be within the internal travel limits. But no more.

Sent from my iPhone using Tapatalk
what this guy said you don't have to worry about stiffness but travel.

Why not run the RC coils at 0" and leave the fabtech spacer in? One would think that a stock strut replacement ie. coilover at 0" would be a direct fit and you wouldn't have any problems? school me if im wrong..
These coilovers are for a 6" lift. What I removed was the stock strut with a 7" spacer. These set at zero with the 7" spacer would never fit.
 
#17 ·
correct, what im saying is why can you not still use those 6 or 7" spacers that came with the fabtech lift with the coilovers set at 0"? that would be essential the same as a stock strut right?
 
#18 ·
Bradley21sanders said:
correct, what im saying is why can you not still use those 6 or 7" spacers that came with the fabtech lift with the coilovers set at 0"? that would be essential the same as a stock strut right?
No, these RC coilovers are much taller then the stock strut. Set to factory they are for a 6" lift, but 1" to short for my Fabtech lift. I am thinking of cranking these all the way back down and putting a 1" Upper spacer. My guess is it will ride much better that way then cranking the spring tighter.
 
#20 ·
ferraiolo1 said:
Again, cranking the spring tighter doesn't change the stiffness unless you're bottoming our the internal travel.

But yes. Adding a spacer to them and leaving them at 0 to allow for full travel is the way to go imo

Sent from my iPhone using Tapatalk
Yes, I just think having them at 0 has to be the best option and use a lower or upper 1.5" spacer. Should I get a round upper spacer or just the 2 bolt lower spacer under the leg ?
 
#22 ·
You're way overthinking it. These struts are designed to be adjustable from 6-7.5". Meaning at 7.5" of height you'll still utilize its full travel capability. The ride will be the same at 6" or 7.5.

You bought them for their adjustability and now you're gonna set em at zero and spend more money on a spacer to achieve the desired height? Just adjust the strut. You said you only got a half inch or so to go.
 
#23 ·
I understand, but RC is saying where I am at is max. I was measuring above the jam nut but they are saying measure above the spring nut, not the jam nut which I am right at 2". So, being that I need another 1/2" I would be going past the max setting. The ride feels worse then my other set up and I can only think it's because of maxing these out. I am just trying different options. I am not happy with these so far.
 
#25 ·
You're going to trigger jacoby with that talk!

Rc gets those coil overs from Asia. Which is why customer service doesn't know much about them.

There is a reason they are half the price of other companies.

Buy the spacer and run them since I'm sure you can't return them.

Sent from my iPhone using Tapatalk
 
#26 ·
I'll be honest, I only paid $500 for these from a guy local that only ran them for about 1000 miles, then he sold the truck and put the original strut and spacer back on. So I figured why not give them a try. I want to try these at the lowest setting and see what changes. If it's the same then I will just live with it or sell them.

I also got the rear vertex shocks and added those first. I can say those made a Huge difference in the ride, major improvement