upper or lower control arms what do they do and do i need them

stanggt00 · Mar 5, 2004

whats more important upper or lower control arms and do i need the adjustable ones or are fix arms just as good

can some one tell me if i get a set of uppers and lowers what they will do for the car

i have the car lowers and i was thinking of getting the subfames but some one told me i should look in to getting control arms just want to check with u guys on that first

03Sleeper · Mar 5, 2004

Well I got a set of D&D Upper and Lower and the end result was Tighter rear end and NO wheel hop!
I know my 60' will drop!
as for fixed or adj. I say fixed I read that most people who have adj. don't even know what the hell to do with them?
Not joking I mean it's better then stock but I'm not sure you need anything more then Fixed ,Unless you are going to race the car every weekend at a diffrent track and NEED to dail it in.When I took the rear and uppers out I was shocked how flemsy they seemed! I was glad to put something ROCK soild in there!

01GT eibach · Mar 5, 2004

The rear control arms are integral ingredient of the car's suspension geometry. The lowers are especially key as they provide the lower mounting point for the rear springs, and also the rear sway bar. The reason the stock arms suck is that they are made of a cheap stamped u-shaped metal that flexes unbelievably bad. The uppers are not as important ... HOWEVER, the uppers are not that expensive and easy to change, so you might as well do them, too. The type you get has a lot to with your application. Drag racers are looking alot at the type that get you the best weight transfer and hooking of the rear tires ... I can not help you with any suggestions there. My car is purely a motivated street car, so adjustability is not a requirement for either upper or lowers. But I did opt ... and I am R E A L L Y glad I did ... for adjustable "weight jacker" type lowers to allow some tweaking of the rear ride height. As my springs have settled, this has turned out to be a nice feature. The handling difference after the new arms is extraordinary, especially when tied to a new heavier rear sway bar -- as the LCA's are the mounting points for the sway bar, the handling improvements are ... in my experience ... pretty dramatic. I really love my car's handling ... it is a lot of fun in twisty roads.

Regarding sub-frame connectors ... yep, get them and get them now. They are critical upgrade required for our aged chaisis. The car should come stock with them.

2000GT · Mar 5, 2004

01GT eibach said:
The rear control arms are integral ingredient of the car's suspension geometry. The lowers are especially key as they provide the lower mounting point for the rear springs, and also the rear sway bar. The reason the stock arms suck is that they are made of a cheap stamped u-shaped metal that flexes unbelievably bad. The uppers are not as important ... HOWEVER, the uppers are not that expensive and easy to change, so you might as well do them, too. The type you get has a lot to with your application. Drag racers are looking alot at the type that get you the best weight transfer and hooking of the rear tires ... I can not help you with any suggestions there. My car is purely a motivated street car, so adjustability is not a requirement for either upper or lowers. But I did opt ... and I am R E A L L Y glad I did ... for adjustable "weight jacker" type lowers to allow some tweaking of the rear ride height. As my springs have settled, this has turned out to be a nice feature. The handling difference after the new arms is extraordinary, especially when tied to a new heavier rear sway bar -- as the LCA's are the mounting points for the sway bar, the handling improvements are ... in my experience ... pretty dramatic. I really love my car's handling ... it is a lot of fun in twisty roads.

Regarding sub-frame connectors ... yep, get them and get them now. They are critical upgrade required for our aged chaisis. The car should come stock with them.

Did road noise and vibration increase with your LCA's?

JonJon · Mar 5, 2004

LCA's were nice, cheap and easy to install. Wheel hop way down and rear end feels more planted on launches

01GT eibach · Mar 5, 2004

2000GT said:
Did road noise and vibration increase with your LCA's?

I never detected any noise or vibration change. Regarding ride harshness ... I originally put in Granatelli weight jacker LCA's w/ aluminum spherical bushings. Wow, there was a big increase in ride harshness. Overall, the ride with the Granatelli's was okay, except it got to be real tiring on bad roads. As I put a premium on drivability, I ripped out the Granatellis in favor of the Pro3i's with poly bushings. That really softened things up alot from the Granatellis. The Pro3i arms probably don't ride exactly as soft as stock arms, but they're definitely in the ballpark -- but the handling improvement over the stock arms was night and day.

03gtmustang · Mar 5, 2004

Anyone have instructions on how to install upper and lower rca's?

2000GT · Mar 5, 2004

01GT eibach said:
I never detected any noise or vibration change. Regarding ride harshness ... I originally put in Granatelli weight jacker LCA's w/ aluminum spherical bushings. Wow, there was a big increase in ride harshness. Overall, the ride with the Granatelli's was okay, except it got to be real tiring on bad roads. As I put a premium on drivability, I ripped out the Granatellis in favor of the Pro3i's with poly bushings. That really softened things up alot from the Granatellis. The Pro3i arms probably don't ride exactly as soft as stock arms, but they're definitely in the ballpark -- but the handling improvement over the stock arms was night and day.

Thanks.

gtrackd02 · Mar 5, 2004

Hmmmmm, tomorow my car is goin in for steeda upper and lower ca's... steel uppers aluminum lowers.... Also some bbk longtubes.. and a tune... anyway I was wondering since i already have full lenth subs.. how much of a difference will i notice with the ca's?

stanggt00 · Mar 6, 2004

thxs guys for the input
i ordered the adj. upper control arms from jdperformance for 135 and i will be getting the lower adj control arms also because the car is lowered

subframes goin next saturday

i am hoping with this combo and my tokicos my 60'ft will get better
and i will get a more planted feel and not an ass sliding side ways feel like the car is in stock form

gtrackd02 · Mar 6, 2004

stanggt00 said:
thxs guys for the input
i ordered the adj. upper control arms from jdperformance for 135 and i will be getting the lower adj control arms also because the car is lowered

subframes goin next saturday

i am hoping with this combo and my tokicos my 60'ft will get better
and i will get a more planted feel and not an ass sliding side ways feel like the car is in stock form

You said it.......I was thinking the exact same thing...Sick of spinnin first thru third..lol

01GT eibach · Mar 6, 2004

gtrackd02 said:
... since i already have full lenth subs, how much of a difference will i notice with the ca's?

H U G E

upper or lower control arms what do they do and do i need them

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