Suspension and Chassis Questions about your suspension? Need chassis advice?

Do LCA's aid in cornering?

Thread Tools
 
Search this Thread
 
Old Jan 20, 2003 | 02:21 PM
  #1  
Eric's85TA's Avatar
Thread Starter
Senior Member
iTrader: (4)
 
Joined: Mar 2001
Posts: 999
Likes: 0
From: Nebraska
Car: 1985 Trans Am
Engine: 400
Transmission: 700R4
Axle/Gears: 3.70
Do LCA's aid in cornering?

I am looking at getting a set of Lakewood LCA's from Summit while I'm redoing the rest of my suspension, instead of just chanign the bushings on my old ones. My car seems to hook up pretty well, so I don't really need them for straight line acceleration. I kind of figures bushings are $40, so why not just spend $87 and get all new, better arms. Also, are there any detriments to installing them? Does the car ride rougher, and is there more road noise?

Thanks,

Eric
Reply
Old Jan 21, 2003 | 02:28 PM
  #2  
Eric's85TA's Avatar
Thread Starter
Senior Member
iTrader: (4)
 
Joined: Mar 2001
Posts: 999
Likes: 0
From: Nebraska
Car: 1985 Trans Am
Engine: 400
Transmission: 700R4
Axle/Gears: 3.70
TTT
Reply
Old Jan 21, 2003 | 05:30 PM
  #3  
REVLIMIT's Avatar
Supreme Member
 
Joined: Nov 1999
Posts: 1,253
Likes: 1
From: Hawaii
Car: 1984 Chevy Camaro
Engine: Built L98
Transmission: T-56 6 speed
the car will ride allitle rougher not that much. And the road noise will increase alittle bit but not that much. But the difference in handling will be noticable and will make up for the ride comfort loss.
Reply
Old Jan 21, 2003 | 06:37 PM
  #4  
mrr23's Avatar
Supreme Member
 
Joined: Oct 2001
Posts: 1,392
Likes: 4
From: orlando, fl usa
Car: 1986 pontiac TA
Engine: 360 HSR
Transmission: 700r4 3300 yank converter
Axle/Gears: 3.27 9 bolt
not anymore road noise than normal. will greatly reduce oversteer. also get the lakewood adjustable panhard rod.
Reply
Old Jan 21, 2003 | 08:14 PM
  #5  
Justins86bird's Avatar
TGO Supporter
 
Joined: Jul 1999
Posts: 3,838
Likes: 4
From: Another world, some other time
Car: 86 LG4 & 92 TBI Firebird
Engine: The Mighty 305!
Transmission: 700R4
Axle/Gears: 3.42
If your really into hard and fast cornering, you might want to consider a rod end LCA, which offers a bind free operation.
Reply
Old Jan 23, 2003 | 05:24 AM
  #6  
Pukka's Avatar
Supreme Member
 
Joined: Jul 2000
Posts: 1,341
Likes: 0
From: Where the chicks absolutely LOVE the V-8 rumble!
Car: 92 RS - Fully Restored w/Custom Int
Engine: LO3 with some mods
Transmission: T-5
Axle/Gears: 3.42 Richmond
LCA's didn't help me with cornering, just straight line traction.

The panhard rod helped improve cornering by giving me better traction when accelerating out of a turn.
Reply
Old Jan 23, 2003 | 09:13 AM
  #7  
MdFormula350's Avatar
TGO Supporter
 
Joined: Nov 2001
Posts: 11,634
Likes: 3
From: Maryland; USA
a combination of both with yield good results in straight line and corning..

keep that rear end planted and centered!
Reply
Old Jan 23, 2003 | 09:27 AM
  #8  
Dewey316's Avatar
Supreme Member
 
Joined: Mar 2001
Posts: 6,577
Likes: 0
From: Portland, OR www.cascadecrew.org
Car: 1990 Camaro RS
Engine: Juiced 5.0 TBI - 300rwhp
Transmission: T5
Axle/Gears: 3.42 Eaton Posi, 10 Bolt
lca's well also really help the car bite on the exit of the corners, the more traction you have , the harder you can get on the throttle coming off the corner, the faster you go!
Reply
Old Jan 23, 2003 | 10:20 AM
  #9  
Matt87GTA's Avatar
Supreme Member
 
Joined: Mar 2001
Posts: 2,047
Likes: 0
From: The State of Hockey
Car: 1987 Trans Am GTA
Engine: Miniram'd 383, 24X LS1 PCM
Transmission: TH700R4, 4200 stall
Axle/Gears: 9", 4.33:1
The common misconception is that the LCA itself and its bushings need to be stiffer so they can't flex to create better handling. What you actually want is for the rear axle to be free of bind but stay planted in proper alignment under the car as much as possible during suspension movement. Poly bushings actually are a hinderence when it comes to handling since they create a lot of bind during movement of the suspension.

When you think about the way the car moves on its suspension you can see that the rear axle does not stay level under the car in the corners or even during hard launches (the body is actually the moving part and the axle is staying on the ground, but you get the idea). This means that if the joints that connect the LCAs and PHR to the car have a rubber or poly bushing they will flex under load and then unload when the load decreases or goes away. This deflection in the joint can adversly effect the springs and shocks attempts to keep the rear axle planted. Plus the material of the bushing creates bind in the system. On the street this is no bid deal because you aren't pushing the suspension to its limits. Go to the track and start pushing the car and these things may put you in the weeds eventually. What you want is consistency and that is where the heim joints come in (spherical bearings). It is true that the poly bushings reduce play in the joints since they are stiffer than the OEM rubber bushings, but a heim joint is basically solid (until it wears out) which means it is infinitely stiffer than a poly bushing - plus they allow the joint to be bind free. Now it is up to the springs and shocks to control the suspension which is something that can actually be controlled and tuned..... If you want to make the car handle better, go with the heim joints .
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Jorlain
Tech / General Engine
6
Oct 8, 2015 01:57 AM
oil pan 4
Fabrication
2
Oct 6, 2015 11:56 AM
bschmale66853
Signature Pictures and PhotoShop Requests
0
Sep 30, 2015 08:11 PM
codeysabatini
Interior Parts for Sale
4
Sep 20, 2015 11:36 AM
okfoz
History / Originality
6
Sep 15, 2015 05:22 PM




All times are GMT -5. The time now is 01:11 AM.