what do you guys think?
i already have:
BMR SFC's
Moog Front Springs (full coil cut)
UMI Wonderbar
UMI Strut Mounts
BMR STB
J&M Panhard
Energy Endlinks



Mikey

 

It depends. What do you have in mind for the car?

Quick note, you're going to have issues with front wheels being "mis-aligned" if you get the A-Arms. Seems that you need both the A-Arms & K-Member to keep stock wheel location from what I've read.

 

the lower control arms dont come with ball joints installed already? other than that it looks good.

 

oops..double post

 

its gonna be just an aggressive daily with the occasional auto-x/road race event..as well as the canyon runs we do....

and about the a-arms..i didnt know that..ill save myself $500 then..just get new A-Arm bushings
yeah they do...my bad.

 

so heres where im at...good? suggestions?

 

My personal opinion, get parts with Del-Sphere joints. They are basically a rod-end with a delrin bushing in them. Allows for rod-end articulation without all the harshness & noise of a true rod end. Poly bushings are fine when the need for smooth suspension articulation isn't really high, such as going to the grocery store or doing a drag race. But when you start doing turns, poly bushings start to bind.

Bind happens when the poly has deformed all that it can easily deform, then it starts deforming undesireably based on load. In most cases, poly deforms smoothly, but once you go past a given point in the suspensions range of motion the poly requires more force to keep deforming. And the more it deforms, the more force it needs to keep deforming. Think of the deformation to force relation as a linear relationship initially and more exponential towards the end (for you suspension experts, I know this isn't the greatest explanation, but its within the general ball-park). A rod end or Del-Sphere allows for a smooth & constant range of motion throughout the range of articulation.

This means that you're car is going to handle better and be more predictable to drive in AX/RR & canyon runs using rod ends or Del-Spheres than poly bushings.

EDIT

I just saw that you're getting sway bar & a-arm bushings, which for there applications will work just fine. Also, Spohn sells all the steering components you listed as a single kit. Saves you something like $20.

http://www.spohn.net/shop/1982-1992-...GM-F-Body.html

 

oh okay..thanks for the run down appreciate the time you took..and now i know..haha

but im just gonna wait on the A-Arms..

 

No problem. Do keep in mind though, the stock bushings on our cars are rubber and are all worn out by now. Rubber suffers the same binding issues as poly, but they yield more before binding.

Vetruck (Dean), had two great threads on suspension mechanics going until he deleted them. Perhaps its time I put my two years of FSAE work into text on suspensions. It'd help answer questions and be an easy guide for new people to follow. Dean has far more experience than me, but I'd say we're about even on the basic book knowledge.

 

yeah i talk to Dean whenever i have questions about suspension..was on the phone with him not to long ago for like 2hours just talking about springs...

i have those posts saved in word files..maybe i should re-post them?

 

Might want to ask him first about that. I've got a thread up on the subject. If he agrees, post it to my thread:

https://www.thirdgen.org/forums/susp...ml#post4932433

 

I would honestly go with the MOOG steering parts rather than the Spohn's. I had problems with the studs stripping when I installed them a second time. I believe the thread fit between the studs and supplied castle nuts is to loose. Perhaps replacing the castle nuts with higher quality pieces would fix the problem. There is nothing like buying new steering components twice in one year.