4 bds/fox coilover questions
03-26-2019, 07:37 PM
#11
the 4” and 6” kits use the same drop crossmembers and components. Both are around a 4.5” drop. The only difference between the 2 kits are the different sized coil overs/strut spacers and the rear blocks. Changing those 2 things and you can go from 4 to 6 or vice versa. I had BDS give me that info but waiting on them to respond about the coil over thing.
My 6" coilovers can definitely be adjusted higher. You can go up to around 7.5" before suspension geometry starts to get extreme. (Same as if you had a 2.5" level. The coilvers set at 7.5" are 2.5" higher than the 5" diff drop). Mine are set just over 6" and my truck is level.
03-26-2019, 08:28 PM
#12
Black Trucks Matter
Thread Starter
That's correct. The main components are the same. From the year I bought my kit, the diff drop is right around 5" for both (just over 5" to be precise), so each lift kit is about 1" difference from the diff drop (-1" for the 4" and +1" for the 6").
My 6" coilovers can definitely be adjusted higher. You can go up to around 7.5" before suspension geometry starts to get extreme. (Same as if you had a 2.5" level. The coilvers set at 7.5" are 2.5" higher than the 5" diff drop). Mine are set just over 6" and my truck is level.
My 6" coilovers can definitely be adjusted higher. You can go up to around 7.5" before suspension geometry starts to get extreme. (Same as if you had a 2.5" level. The coilvers set at 7.5" are 2.5" higher than the 5" diff drop). Mine are set just over 6" and my truck is level.
03-26-2019, 09:53 PM
#13
Hmmm... not 100% sure. I'm guessing you could drop it to around the 5" area since there's a little bit of flexibility with it, but not sure about going all the way down to 4".
03-26-2019, 11:55 PM
#14
Senior Member
But again I've questioned that and didn't know what the actual specs were for each coilover as fox only does a 4"-6"
03-27-2019, 12:04 AM
#15
In looking at the Q&A section on Stage 3 for both the 4" and the 6" coilovers, several people have asked if they're interchangeable and the vendor response was always that they're not interchangeable, and that the two heights are different coilovers. That's what I would have guessed as well since they do have different Part #'s.
03-27-2019, 12:10 AM
#16
Senior Member
In looking at the Q&A section on Stage 3 for both the 4" and the 6" coilovers, several people have asked if they're interchangeable and the vendor response was always that they're not interchangeable, and that the two heights are different coilovers. That's what I would have guessed as well since they do have different Part #'s.
But I also agree that it isn't worth the cost to be the guinea pig on this. So, OP, decide what height you want 4-5" or 5-6"? Then choose appropriately.
03-27-2019, 01:20 PM
#17
Black Trucks Matter
Thread Starter
This is my response from BDS:
“Hello Brian,
Thank you for choosing BDS Suspension Systems. The 6" coilovers can be adjusted down from 6-4.5" of total lift height without diminishing the ride or performance of the coilover. The use of the 4" coilover, and increasing the preload would cause the ride to get stiffer with the ride height increase.”
after seeing this this I think maybe the 4” coilover is made more for those seeking to stay at 4” and not any higher, but then I wonder why even have the 4” unless it is simply because the 6” will only go down to 4.5”...
“Hello Brian,
Thank you for choosing BDS Suspension Systems. The 6" coilovers can be adjusted down from 6-4.5" of total lift height without diminishing the ride or performance of the coilover. The use of the 4" coilover, and increasing the preload would cause the ride to get stiffer with the ride height increase.”
after seeing this this I think maybe the 4” coilover is made more for those seeking to stay at 4” and not any higher, but then I wonder why even have the 4” unless it is simply because the 6” will only go down to 4.5”...
03-27-2019, 01:26 PM
#18
I'm sure it's partly that, and maybe something to do with the cost. You can get the 4" version for (around) a couple of hundred bucks cheaper, so if you know you don't need the extra 2", you might as well save the extra dollars.
03-27-2019, 01:31 PM
#19
Black Trucks Matter
Thread Starter
ok well then I guess its 6 for me lol. Obviously the more flexible choice.
The following users liked this post:
Florida_F150 (03-27-2019)
03-27-2019, 01:31 PM
#20
In keeping with the intent of this thread, I have a question:
If one were to purchase a 4" coil-over + rear block kit, presumably it would come with coil-overs that are adjustable from "X" to 4". But are they in fact adjustable? And what is the range of that adjustability? Could they be cranked down to 2"? 2.5"? 3"? And at the upper end, do they top out at exactly 4"? or is there actually a little more? I am curious because...
Ideally the truck would end up level with 4" coil-overs in the front and 4" blocks in the rear. But if in fact it was slightly nose-high (or the owner decided he wanted a very slight rake) could the coil-overs be cranked down 0.5" or 0.75"?
If one were to purchase a 4" coil-over + rear block kit, presumably it would come with coil-overs that are adjustable from "X" to 4". But are they in fact adjustable? And what is the range of that adjustability? Could they be cranked down to 2"? 2.5"? 3"? And at the upper end, do they top out at exactly 4"? or is there actually a little more? I am curious because...
Ideally the truck would end up level with 4" coil-overs in the front and 4" blocks in the rear. But if in fact it was slightly nose-high (or the owner decided he wanted a very slight rake) could the coil-overs be cranked down 0.5" or 0.75"?