Guldstrand mod ??

[68BNUT]

OK 1 question for you guys. If I get a set of aftermarket upper A-arms do I still need to do the G-strand mod???? This is on a 68 camaro.
Thanks

[dennis68]

Yep, aftermarket arms don't do much if anything for improving roll center height or camber gain. Do the mod.

[harshman]

Yah, that’s the question that I want answered. What do those high priced arms do for the geometry of the suspension anyways? It seems that I have yet to get a firm answer backed up by before and after tests. I have fabed many things from scratch and know that the materials used in the arms are worth all of about $25 each at the most. I guess I’m a tad bit skeptical and have yet to hear some tech to back these things up.

[ViperBlue68]

Yah, that’s the question that I want answered. What do those high priced arms do for the geometry of the suspension anyways? It seems that I have yet to get a firm answer backed up by before and after tests. I have fabed many things from scratch and know that the materials used in the arms are worth all of about $25 each at the most. I guess I’m a tad bit skeptical and have yet to hear some tech to back these things up.

I wish the prices reflected that........but then again capitalism is the american way lol

[Steve1968LS2]

Yah, that’s the question that I want answered. What do those high priced arms do for the geometry of the suspension anyways? It seems that I have yet to get a firm answer backed up by before and after tests. I have fabed many things from scratch and know that the materials used in the arms are worth all of about $25 each at the most. I guess I’m a tad bit skeptical and have yet to hear some tech to back these things up.

Wouldn't that be a great challenge.. a stock subframe with Guldstrand mod vs a stock subframe with upper lower arms vs an aftermarket subframe with aftermarket arms..

Oh wait.. we had that thread already ;)

Well they sure look purty.. and they are sometimes lighter..

[harshman]

Wouldn't that be a great challenge.. a stock subframe with Guldstrand mod vs a stock subframe with upper lower arms vs an aftermarket subframe with aftermarket arms..

Oh wait.. we had that thread already ;)

Well they sure look purty.. and they are sometimes lighter..

We are beggin’ for it, now dos PHR have the balls to test it? Proving their advertisers wrong is a big thing indeed. It would be a very simple thing to do. Perform the skidpad and slalom test to a stockish car. Next install upper and lower control arms and do the same test. Next remove the aftermarket and install the stamped arms with the g-mod and test. I don’t think it is that hard to do, I just don’t know if any magazine is up for the challenge. I'll even let you use my car to test 'em.

[TitoJones]

Andy, We at ATS have done this test already. Chicane started it, and Baz67 finished it. We are debating on whether or not to release it to a mag, or keep it for ourselves.

Tyler

[baz67]

Justin, I would and I am going to do the Guldstrand mod with my GW arms. Like Dennis says it improves more complex front suspension geometry variants.

Harshman, the tubular UCAs are stronger and have a lot more static caster built in than stock UCAs.

Brian

[Tom Welch]

I too, have issues with the tubular control arms, If the stock arms are in good condition how are the aftermarket offerings THAT much better? I understand more caster but I do not understand how they could be much stronger that the stock arms. I also know that the tubes do look good. Smokey Yunick used modified stock arms didnt he? How about Mark Donahue? I know that they developed and raced long ago but has control arm design really advanced that much? I wonder. They cant be bad but how much better?

[ilovefirstgens]

Heres my understanding, there are different designs of tubular arms, and the usefullnes of the guldstrand mod depends on shich you went with I would contact the manufacturer, or do some poking around the suspension area of camaros.net as I am sure it has been discussed there. alsocheck out this site http://ourworld.compuserve.com/homep...suspension.htm

[68BNUT]

I was under the assumption that the after market arms are stronger and had more adjustability. So Im guessing that doing the g-strand mod and getting after market uppers would make for a potent suspension upgrade. Now if I could just figure out what kind of bushings to go with definetly dont want solids but now im hearing mixed reviews on poly bushings,, thinking of maybe just going back with stock rubber bushings?? Any thoughts on that combo would be apreciated.

[Ralph LoGrasso]

Justin,

What UCA's are you looking into? If you have any interest in Detroit Speed, just use their coilover kit with their arms. It relocates the mounting points similar to the G-mod, but it's optimized to work with their arm design. DSE arms come with Delrin bushings.

[68BNUT]

Ill check in to the dse and the coilovers do the upper coilover mounts need to be welded in?? or is it direct bolt on?? are the delrin bushings solids??? im assuming so since its close to del-a-lum, Ive had a 95 Z28 and a 99 C5 I just wondering if solid bushings will make the ride stiffer than that kind of sport suspension??

[baz67]

Justin, you do want to run a del-a-lum type bushing. Rubber has too much complience in a racing aplication.

Brian

[Ralph LoGrasso]

Justin,

The coilover kit, constitues the old mounts being cut off, and new mounts being welded into place. It is not a bolt in. Delrin bushings are solid, I believe. I'm not sure how harsh the car would ride with them. I would think that a harsh ride would be more dependent on spring rates. Del-a-lum is made of Delrin and aluminum if I remember correctly.

[68BNUT]

yeah I did some research on the dse stuff It looks real good maybe a little good for my wallet, What I would ultimatly like to do is get a decent set of uca's do the g-mod and then do coil-overs and just weld in some kinda reinforcements on the lower arms. do the poly bushings still squeek like the used too?? never had a set just always here the storys.
Thanks for all your guys input, Its time to get some front suspension on the thing im tired of hearin the tire rub when I hit the incline to fast in the drive way and the ball joint poppin when im pullin out!

[dennis68]

I run 750 lbs springs, solid steel bushings in the upper arms and Teflon bushings in the lower arms. It rides smoother than most cars of it's vintage.

Del-a-lums are simply GW's version of teflon lined bushings that are available from dozens of other sources. I prefer the steel shell/Teflon bushings so the shells can be welded to the arms.

[harshman]

Stronger they are not. However they are lighter. As far as static caster – how much of a gain is there to justify $600? Howe Racing and many others make arms as well but they are $50 each and some are infinitely adjustable. If these arms are that much better, where is the data? Where is the test mule with numbers to back it up? I’m not saying that there isn’t one; I just have yet to see it.

[jannes_z-28]

The guldstrand basically does two things.

1. It raises the rollcenter

2. It increases the caster

The UCA's only does the #2 in some cases, the most of them does it.

Jan

[baz67]

...If these arms are that much better, where is the data? Where is the test mule with numbers to back it up? I’m not saying that there isn’t one; I just have yet to see it.

I am doing exactly that as we speak. I am about done. I am just redoing some of the measurements to varify the data. Some of it is interesting indeed.

One thing to keep in mind with the QA1 conversion is that you should beef up the LCA. By using that conversion you put all of the weight and stresses of the front end on the two bolts holding shock to the LCA.

Brian