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Tech Area => General Buick Tech => Topic started by: Steve Wood on September 24 2012, 10:28:45 AM

Title: Standard Rear vs Variable Rate cargo rear springs
Post by: Steve Wood on September 24 2012, 10:28:45 AM

Anyone ever compare the ride height between the two?  Also how is the handling affected between the two?

Thinking about replacing the Eibachs on the rear of my GN to get a little more clearance above the 28" tire when I have a passenger while going down a bumpy road

Title: Re: Standard Rear vs Variable Rate cargo rear springs
Post by: Steve Wood on September 24 2012, 11:55:45 AM

never mind, I think I will use the standard spring

Title: Re: Standard Rear vs Variable Rate cargo rear springs
Post by: Scott87 on September 24 2012, 12:09:56 PM

What was the finding that persuaded your decision?

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Title: Re: Standard Rear vs Variable Rate cargo rear springs
Post by: Steve Wood on September 24 2012, 12:11:44 PM

better launches according to some

Title: Re: Standard Rear vs Variable Rate cargo rear springs
Post by: Steve Wood on September 24 2012, 12:12:53 PM

still trying to figure out which is the best part number for the moog, tho :D  Do not want lower than stock ride height

so far it looks like the 5379

Title: Re: Standard Rear vs Variable Rate cargo rear springs
Post by: daveismissing on September 24 2012, 10:08:11 PM

Where is this database of spring specs that you guys peruse?

Title: Re: Standard Rear vs Variable Rate cargo rear springs
Post by: Steve Wood on September 24 2012, 10:51:13 PM

Peruse, abuse, whatever

Here is one....   http://jeffd.50megs.com/Moog_Spring_Page.htm (http://jeffd.50megs.com/Moog_Spring_Page.htm)
I think there is similar on the monte site and gbody sites...

Or you can dumb it down on rock auto

Title: Re: Standard Rear vs Variable Rate cargo rear springs
Post by: TRICKSIXPA on September 27 2012, 05:06:19 PM

I took my Eibachs off after I redid the rear suspension my 28s where sitting awful close went with the Moog Cargo coils variable weight. As long as there is a good bar on the back car will be fine. I stayed Variable weight since the Eibachs were a variable weight spring too. just wanted to pick the car up a couple of inches. Took the Eibach off the front when I redid the front supension too.

Title: Re: Standard Rear vs Variable Rate cargo rear springs
Post by: Steve Wood on September 27 2012, 05:57:40 PM

Yeah, the Eibachs are variable and they seemed to work fine.   If one is trying to be technical, most shocks are valved for a linear spring rate and the variable springs also tend to unload the suspension more abruptly than does a linear wound spring after launch.

In the back of my head, I keep thinking the springs on the other car are variable rate but I might be wrong.  It has no problem with the tires even with someone in the back seat.  At any rate, spring or not, I sent $42 for a pair of standard replacements to the Rock.

Eibachs still on the front at this point.  For sure they resist weight transfer

Title: Re: Standard Rear vs Variable Rate cargo rear springs
Post by: motorhead on September 27 2012, 08:18:05 PM

I use standard springs from a Celebrity wagon... I've seen springs from a Fox body Mustang used as well.

Title: Re: Standard Rear vs Variable Rate cargo rear springs
Post by: Steve Wood on September 28 2012, 10:56:39 AM

Was wrong...other car has linear springs on it...got the replacements in this morning