dukeboy_318 said

A few people have been asking me about my rear suspension, i should have the thing installed in the coming weeks as i get free time from 2 kids under the age of 3, so pics will be uploaded as I go. In the short term, I thought i'd discuss why I chose the kit I'm going to use. I'll also try to answer any questions you may have. Keep in mind, I dont claim to be nor am I a suspension expert. I have a working and practical knowledge is all.

Now before I get into why I chose or decided against one kit or another, this is just my opinion, what works for me may not suit your needs or vise versa. This post is not design, meant or implied to sell or not sell a kit. I am merely stating my reasons upfront for my choice, I am not putting down any other kit or maker. I am listing the retail prices by each as well. But mainly because cost does play into every decision. What I will do, is attempt to thoroughly explain my choice, I will answer any questions to the best of my knowledge, however what I will not do, I repeat, what I'm not going to do is to debate one maker over the other, as what happened the last time I posted my front kit. If you wanna turn something into a mud slinging contest, go join Hillary's or Donald's campaign team. Also, I promise to have typos, it happens, especially with autocorrect haha. If you are good with that, continue reading, if not, dont bother reading on.

First I listed some requirements:

Had to be adjustable and suitable for road racing, drag racing, street
Had to be easily tunable with multiple tuning features
Be cost efficent, bang for buck
Use at minimum dual adjusting shocks
Allow for the maximum width tires possible without backing halving
Ajustable ride height
Allow for corner balancing the car
Allow me to keep my rear seat

So lets look at my options:
Mopar SS springs, sway bar and Dual adjusting shocks.
RMS Street Lynx
QA1 6 Link
Magnum Force Pro Link
Control Freak 4 Link (parallel with pan hard)
Custom

Option 1: Mopar SS Springs, rear sway kit and dual adjusting shocks(vikings, qa1?)

Pros:
Tried and true long time upgrade for Mopars
Cheapest option
Easiest to install

Cons:
No adjustability other than the shocks
Only 2 spring rate options
Requires a spring relocation kit to fit wider tires
No ride height adjustment
Cannot corner balance

Cost: 920 with shocks, sway and springs( not counting relocation kit)

Decision: No go, must have more adjustment

Option 2: RMS Street Lynx

Pros:
Popular upgrade.
Some tuning features
Dual adjusting Coil Overs

Cons:
Trianugluated 4 Link means limited adjustability.
No Sway Bar
Requires spring relocation kit to get wider tires

Cost: 1995
Decison: No Go, while it has some adjustability, very limited with a triangulated 4 link.

Option 3: QA1 6 link

Pros:
Adjustable Coil overs(3 options)
Bolt in
Adjustable rid height(1 in +/-)
Sway bar

Cons:
Bind central, just dont see how this works to improve handling let alone without binding
Expensive, most expensive of any kits
Heaviest option, the added parts to make this a 6 link add weight.
No need for 2 rear ward links
Keeps the roll center in the high, non adjustable position
Uses stock locations to bolt in, not compatible with inboard relaction kits meaning wider tires arent possible.

Cost: 2995.00(Single adjustable coilovers); 3195 (dual adjusting); 3895 (4 way adjustable)

Decision: No go, too expensive and just offers no real advantages in performance or tuning over a 4 link.

Option 4: Magnum Force Pro-Link

Pros:
Adjustable in alot of areas but roll center and ride height are not
Choice of panhard bar or watts link.
Mounts inboard of frame to allow much wilder tires

Cons:
Location of watts link puts the roll center high above the rear axle, chosing the panhard would help this but panhard isnt adjustable
Roll center is high and non adjustable.
Doesnt come powder coated but they will for an extra 500 bucks
2nd most expensive kit
Magnum force's reputation
No Sway bar option

Cost: 2574 bare with dual adjusting coil over shocks, 3069 powdercoated with same coil overs

Decision: No Go, high roll center would actually work against my front suspension, creating an unpredictable roll in high speed corners


Option 5: Control Freak Rear suspension Parallel 4 Link with Panhard bar

Pros:
Adjustable with pan hard(though limited on the panhard)
Dual Adjustable coil overs standard.
Parallel 4 link allows for road racing, drag racing and street driving.
Adjustable ride height
Sway bar option(329+)
Allows wider tires
Complete, powder coated ready to go kit

Cons:
Very hard to think of any here, so I had to split hairs.
While the panhard bar is adjustable, I'd prefer slots to get a finer tune on the panhard bar but I'm splitting hairs so i wont count this in my decision.
The pan hard bar allows the rear to move slightly along a curve bias, therefore, while wider tires are allowed, still need to run some clearance to ensure they dont rub the frame or quarters.

Cost: 1899 without sway bar, 2228 with sway bar

Decision: Go, adding to the consider list. With only one negative I can find with it, definity fits the bill for what I need.

For option 6, Originally I started out to design and build my own. While I can fab and weld and have the tools to do so, my skills aren't up to the level I trust enough with my life or the lives of those with me. Since I lack fabrication skills to this level, I decided to give Carl Gerst a call, give him my requirements and see if he could come up with something that would work. When I called, I spoke with him for over an hour, came to learn that he had already been working on a rear system for the past several months and that it was almost ready to go public with it after a few more tests. As he rattled off the features he was building into it, I was stunned. I just didnt think it'd be possible to fit all that into an A body.

Option 6: GTS Dominator Series 4 link with Watts link

Pros:

Adjustable links, links feature different height and angle options allowing a user to fine tune the links to the driver and track
Adjustable ride height
High travel, dual adjustable coil over shocks.
Links mount inboard of frame and allows for much wider tires than stock
Watts link is centered in the rear of the axle, just behind it and features 8 inches of adjustable roll center adjustment
Watts links are also tunable.
Very cost effective, cheapest of the adjustable 4 links with sway bars thus far., 3rd overall in price behind Option 1 and 2.
Sway bar included
Watts link allows the rear to move up and down straight, meaning less clearance needed for the tires, allows just that much more tire or to use spacers to help tune track width.

Cons:
Very hard to come up with any here
So much adjustment, I'll probably get myself in trouble lol

Decision: Go, add to consider list. I may be biased after having his front kit, but this rear kit knocked my socks off.

The sheer amount of adjustment is amazing. This kit will allow me to fine tune my car not only to my liking, but to the track.

Final Thoughts:

This was a tough call between the Control Freak And the GTS. Both of these kits met all my requirements and then some.

Both had very few to no cons. Price being about the same, the GTS does have the most adjustability as well but this ultimately boiled down to having a matching setup plus the uniqueness and tunability of the GTS. So I went with the GTS Dominator Series

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abodyjoe said

also not being able to run a wider tire without mini tub on the triangular 4 link is wrong. you can go wider then with leaf springs no doubt... i was running a 275/50-17 (damn close to 11" wide) on the rear of my dart with a triangular 4 link. quite a bit wider then a 225/50-17 (close to 9" wide) that is super close to the leaf springs. thats a pretty good difference.. no?

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abodyjoe said

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and now ya say you can use the spring re-location kit... see the issue? your first post says you can't use a spring re-location. this post right off the rms site clearly states that you can use a relocation kit.


look i'm not trying to bust your balls here. its a neat looking kit that i hope works well for you. but some of your information is clearly wrong and you are posting it here as fact. makes me question the accuracy of the information on the other kits you posted about. all that does is hurt your credibility and makes you look like a gts commercial. do ya see where i'm coming from here?




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abodyjoe said

ok i see ya fixed the original post.. thank you for doing so.. the proper information is critical..

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