Hi all,
I'm getting BMR springs installed on my car in a week or two, and am adding in cradle centering bushings at the same time. As I look into the next phase I'm planning on "locking down" the IRS. I don't want to change everything all at once so I'm looking at sensible clusters of mods to do.
BMR, FTBR, Steeda, SPL, Cortex and others offer various combos of bushing and lockouts for the IRS: cradle bushings or lockouts, diff bushings or lockouts, IRS braces, vertical links and various levels of bushing (poly, delrin, billet, spherical...). Here are some of my assumptions and my tentative plan, feedback welcome.
First question is which things to do at the same time. My thoughts are cradle/diff/bracing and vertical links, and then I'll address rear control arms later and at the same time as front control arms. Sensible or am I missing something?
For the cradle, my understanding is that there isn't much NVH risk there so going stiffer isn't a big deal, but for the diff there's more significant NVH risk, so I'm thinking I'll go a bit more aggressive on the cradle than on the diff. Also assuming vertical links aren't a significant NVH concern.
My understanding is that the bracing/lockout kits in large part cover for soft bushings because changing the bushings is a PITA.
So, what I'm thinking at the moment, with Qs:
Thanks for all input.
Chip
I'm getting BMR springs installed on my car in a week or two, and am adding in cradle centering bushings at the same time. As I look into the next phase I'm planning on "locking down" the IRS. I don't want to change everything all at once so I'm looking at sensible clusters of mods to do.
BMR, FTBR, Steeda, SPL, Cortex and others offer various combos of bushing and lockouts for the IRS: cradle bushings or lockouts, diff bushings or lockouts, IRS braces, vertical links and various levels of bushing (poly, delrin, billet, spherical...). Here are some of my assumptions and my tentative plan, feedback welcome.
First question is which things to do at the same time. My thoughts are cradle/diff/bracing and vertical links, and then I'll address rear control arms later and at the same time as front control arms. Sensible or am I missing something?
For the cradle, my understanding is that there isn't much NVH risk there so going stiffer isn't a big deal, but for the diff there's more significant NVH risk, so I'm thinking I'll go a bit more aggressive on the cradle than on the diff. Also assuming vertical links aren't a significant NVH concern.
My understanding is that the bracing/lockout kits in large part cover for soft bushings because changing the bushings is a PITA.
So, what I'm thinking at the moment, with Qs:
- Cradle centering sleeves, already ordered from BMR.
- Cradle bushing lockout kit or cradle bushings? Poly or Aluminum? I'm leaning BMR aluminum bushings.
- Diff bushing lockout or diff bushings - poly. Skip this? I'm leaning BMR poly bushings.
- Vertical links with rod/spherical ends from SPL or Cortex. Does it make sense to do these at this point?
- Do I need an IRS bracing kit (BMR or Steeda)?
- I'm leaning to waiting on lower control arms/bushings as well as sway bars and end links for next phase.
Thanks for all input.
Chip