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@  Marchi1 : (13 January 2021 - 12:20 AM)

I think we can do that

@  ejguillot : (01 January 2021 - 07:29 PM)

Happy New Year all! Let's keep this board alive for 2021.

@  dezldave961 : (26 November 2020 - 07:26 PM)

Same. While having my GTP from 02-14, I built it for a buddy in 09 and bought it from him in 16. Going all out now while we're still on partial shutdown. Great way to pass the time.

@  ejguillot : (19 November 2020 - 08:36 PM)

Welcome back earth1. I'm still sticking by my project regal, even if it has been a garage queen for the last couple of years.

@  earth1 : (18 November 2020 - 03:27 PM)

I want to thank those who run this site for their dedication and for keeping this site going through the years. To have a really good Regal GS, one has to have an extraordinary level of dedication to the car that includes a long-term commitment to it, and not just a passing fancy. Similarly, to the people that keep this site going through the years had to have a similar level of dedication and commitment to keeping it going. I just want to tip my hat, pay my sincere respect to this level of commitment, and say thank you. I will try to contribute what I can. I know that these cars are 20+ years old now and a lot of people have moved on from them, but I want to be counted as one of the ones that stuck with them for the long-term. I hope to see others that love their Regals be active here in this site, and for the Regal community to support each other. Count me in.

@  earth1 : (16 November 2020 - 07:49 PM)

I finally remembered my password and can get logged in. I have missed posting to this forum. Lots of things to add here from my own Regal GSE project.

@  ejguillot : (20 October 2020 - 03:32 PM)

Well, welcome back!

@  Marchi1 : (13 October 2020 - 11:58 PM)

Holy Crap I got in...finally remembered my login

@  dezldave961 : (08 October 2020 - 02:13 PM)

:peeks around the corner:

@  ejguillot : (06 October 2020 - 01:41 PM)

Glad to hear there are still lurkers around.

@  buck531 : (05 October 2020 - 12:15 AM)

sup turd buckets?

@  de.regal : (04 October 2020 - 10:50 PM)

Still lurk every day

@  tpivette : (03 October 2020 - 02:32 AM)

Sucks these forums are as vacant as they are... oh well, there's still the faithful like us!

@  kevandkaye : (27 September 2020 - 02:40 AM)

Yet still, we lurk. :o

@  ejguillot : (27 September 2020 - 01:08 AM)

Yeah, Facebook took over and killed forums.

@  dezldave961 : (26 September 2020 - 03:24 AM)

Ya, most of the original wave of active members have changed vehicles to something (probably) less mod-friendly, with the occasional person in an LS or Hemi that they do some bolt-ons to. Kinda sad that forums faded.

@  ejguillot : (23 September 2020 - 09:02 PM)

Finally updated my signature to match my current Buick.

@  ejguillot : (10 September 2020 - 03:20 AM)

Things are terminally quiet around here...

@  sky72lark : (07 August 2020 - 12:38 AM)

:orcs-buttshake:

@  dezldave961 : (29 July 2020 - 04:06 AM)

Just became a moderator on 3800Pro, so that's fun. I know it's gone thru a couple hands since Intense got sold, then that guy sold the forum. Not sure what that'll help, but it's something.


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Suspension upgrades


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15 replies to this topic

#1 deezdad

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Posted 07 December 2020 - 12:36 AM

Hello everyone, I have a stock 100k mile 04 gs that's been garaged sitting for a couple years, would like to go thru it over the winter tune up, fluids etc and figured it would be a good time to go thru the suspension .. what should I replace and from where? Not looking to do anything crazy just an improvement over the worn stock parts maybe slightly lower with new 17" wheels & tires, some bracing etc. Just really don't know where to begin I haven't been here too much but do appreciate & look forward to your input, thanks -Dan
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#2 ejguillot

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Posted 07 December 2020 - 06:17 PM

There are a lot of things to look at:

 

Condition of shocks?

Any squeaks or rattles?

Any rusty parts?

 

There are a lot of areas that can be improved, depending on budget.


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#3 deezdad

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Posted 08 December 2020 - 01:14 AM

Probly didn't word things very well.. I'm gonna go head and replace the stock suspension parts wether it needs it or not just curious what u guys recommend for upgrades over stock
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#4 ejguillot

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Posted 11 December 2020 - 06:10 PM

Here are a few standard recommendations that I have done to my Regal (check previous posts for more details): 

Throwing in brake upgrades as well.

 

Rear suspension:

Replace the standard trailing arm (U shaped open channel) with a boxed trailing arm, for increased stiffness

Install a strut tower brace across the rear strut towers

Replaced springs with ones from an Olds Intrigue (reportedly 40% stiffer than Regal GS springs)

KYB GR-2/Excel-G shocks

GM Performance Parts rear sway bar (Thicker than stock)

 

Front suspension:

Replaced the subframe with one from an 02 Impala (Aluminum, about 25 lbs lighter than the stock steel one)'

Replaced the subframe bushings with new ones (old ones were shot and mushy)

New lower control arms (Moog, meant for a Grand Prix GTP, different part # than the ones for a Regal. I presume it's stiffer bushings.)

Install a strut tower brace across the front strut towers (99 and newer usually have this standard)

Replaced springs with ones from an Olds Intrigue (reportedly 40% stiffer than Regal GS springs)

KYB GR-2/Excel-G shocks

GM Performance Parts front sway bar (Thicker than stock)

Replaced front brakes with setup from 98-02 Camaro/Firebird (from 11" single piston to 12" dual piston).  Look up F body brake upgrade

 

Search the forums for more details and howtos.


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#5 Marchi1

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Posted 11 December 2020 - 06:58 PM

All of that above would keep you at stock ride height. If you want to go lower I have been running a set of Vogtland Springs on AGX struts with a pair of spring blockers in the rear since 2010, and love the ride.

 

I also would recommend the brake upgrade but pop for the extra on stainless steel lines for all four corners as well.

 

On a side note I may have some parts available soon for this.....



#6 OhMyGS

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Posted 12 December 2020 - 02:01 AM

All this done here as well with some variation. SSC lowering springs, AGX struts, BMR trailing arms, strut tower braces front/rear, GP LCR, larger stabilizer bars front/rear, largest available for rear to help with under steer. Still rockin' the steel cradle though.
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#7 ejguillot

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Posted 12 December 2020 - 08:04 PM

All correct about the stock ride height.  I didn't want to sacrifice ground clearance or suspension travel, there are some large speed bumps around where I live.  For shocks and struts, 2 other options to consider:

 

Stock height: Apparently GM sells a quick strut meant for the Impala police package cop cars.  Haven't found a part number yet, after years of searching.

Lowered/adjustable: You can still get the KYB AGX strut and lowering springs from ZZPerfomance, but the combo for all 4 corners will cost $899.  I would forget about that, spend less than $100 more, and get a full coilover setup from ZZP. See here:  https://zzperformanc...-coilovers-3800

Advantages of the coilover setup: pick your ride height, and can be adjusted after install.  Shock components are rebuildable, and parts for such are available for sale.


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#8 deezdad

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Posted 12 December 2020 - 09:25 PM

Those coil overs look nice, what is the swift spring upgrade that one of the reviewers was talking about?
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#9 ejguillot

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Posted 14 December 2020 - 08:25 PM

That I don't know.  I might be interested myself.


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#10 Marchi1

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Posted 15 December 2020 - 12:23 PM

If you want something that handles well and is stock ride height get the Bilstein set-up for the GXP Grand Prix. Solid suspension and ride height is actually unchanged.

 

The swift spring upgrade is for a higher spring rate. The ones that normally come with these are a fairly soft spring.



#11 ejguillot

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Posted 15 December 2020 - 04:32 PM

Wonder what the full price of the Bilstein setup is. A quick look at Rockauto shows the front shocks at $179 each, figure the rears are about the same, add springs and other bits and you're at the same price as the ZZP coilovers.


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#12 dezldave961

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Posted 17 December 2020 - 06:58 PM

The BC Racing coilovers (from ZZP or direct from BC) are definitely the way to go if you decide to spend any significant amount on upgrades, and BC has gotten big in the aftermarket, so maintenance/replacement/custom spring & shock options will be around for a while.  I may do Impala rears to get thru winter/spring (if a local yard has some) as I street-test the new setup, and set aside money for the BC's to dial in for different uses next year.  I had Intrigue rears (similar style back then) on my GTP for a long time, and it was a significant boost of 1-2".

 

My GXP is a fun OEM handling car, but I am eager to see what some upgrades beyond Bilsteins offer on the Regal.  Already did Dorman trailing arms and F/R strut braces (nice brackets from Don Rome and old ZZP ones).  Not trying to turn this boat into anything special, but the GXP has pampered me in these rolling VA hills the past couple years.


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#13 ejguillot

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Posted 18 December 2020 - 05:33 PM

I'm with Dave on this one.  Have the same Dorman trailing arms and F/R STB's.  My current shocks and springs have 100K on them, and they're all worn out.  So I'm looking really hard at the ZZP/BC coilovers.


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#14 Wildcat

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Posted 06 January 2021 - 10:37 PM

The bearings may already have been done once by 100k miles, but if they have not then you might include the price of new unit-bearing assemblies in your budget.

My originals were absolutely toast at 70k miles, and my "cheap" replacements were toast at 150k miles. To the point that they made that telltale noise like worn out snow tires, and the car is wandering more and more.

In my case I can't separate the failing bearings for the not-so-great tires this time, but even with good tires you could feel a difference when the new bearings went in the first time.

 

I have Bilstein on the rear only, because at the time that was the only one available. They offered Sport and Touring models, and all that remained were the touring. Which worked out fine. AGX on the front. And I must say, that the '04 struts from the factory were fantastic! But they eventually wore out and I had to look for a replacement. A member here had the full GMPP Koni lowering strut kit he was selling, and you might check into that if you think they're still viable after all these years sitting on the shelf.

 

All of the mods the others are talking about you can feel by the seat of your pants. The strut tower braces were probably the biggest surprise to me. Very noticeable improvement.

But the best of all was the big-brake swap. I have the aluminum caliper Camaro brakes with Powerstop slotted rotors and they all just fit inside my stock Abboud wheels. The difference in braking feel was even more than I expected. Not only more powerful, but also smoother at the limit. And when the anti-lock checks in, it's much more subdued and you don't get the same oscillations and clunks and bumps as with the stock brakes. BIG improvement in my book. Well worth the minimal extra cost of doing business, if you're doing brakes anyway.

 

Good luck

 

paul


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#15 dezldave961

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Posted 11 January 2021 - 01:20 AM

ZZP just hinted at a new suspension product release for 3800/W-body folks soon (guessing either more coil-over items, control arm upgrades again, or even better), so hopefully that along with some things they fell behind on re-stocking from their fabricated parts are available as spring/summer rolls around.


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#16 ejguillot

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Posted 12 January 2021 - 09:38 PM

That's good news, that at least one merchant is developing new products for our platform.


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