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03-09-2013, 01:36 PM
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#1
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11 Second Club
Join Date: Feb 2008
Location: Edison, NJ
Posts: 4,620
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Lowering springs
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1999 Z28 Convertible. 6 speed swap, wide cowl hood, full hockey stripes, and a whining 10 bolt.
2008 Sierra Vortec Max. 6.2 swapped, headers, Magnaflow catback, GMPP CAI, NHT optioned tow package.
2006 GTO, 11.48 @ 118.3
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03-09-2013, 08:32 PM
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#2
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Join Date: Oct 2009
Location: West Milford
Posts: 1,026
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I've had a lot of different spring manufacturers and have always come back to eibachs. Springs are an integral part of your suspension..things like compression rates/rebound etc aren't to be taken lightly. There's a reason why eibachs or a quality manufacturer are $320 +/-. Personally i wouldn't buy these, i've had cheap ones that didn't site in the perch index 100% due to what appears to be quality..up to you.
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1991 Camaro
1992 L98/ttop Firehawk tribute (sold)
2006 Srt-10 Viper
2012 z-71
2011 Equinox (family vehicle)
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03-09-2013, 09:26 PM
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#3
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Join Date: Jun 2011
Location: Manahawkin New Jersey
Posts: 608
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Quote:
Originally Posted by 1320B4U
I've had a lot of different spring manufacturers and have always come back to eibachs. Springs are an integral part of your suspension..things like compression rates/rebound etc aren't to be taken lightly. There's a reason why eibachs or a quality manufacturer are $320 +/-. Personally i wouldn't buy these, i've had cheap ones that didn't site in the perch index 100% due to what appears to be quality..up to you.
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I agree. These f-bodies dont have the smoothest ride to begin with. I personally like BMR, but eibach pros, or stranos, are what everyone in most cases are using. Also the ride quilty gets alittle better with them as well.
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97' Z28, M6 w/ golen engines 396 Lt1, rpm transmission level 6 t56, moser 12 bolt eaton posi w/ 4.11 gears, Hooker super comp long tube headers ory-pipe, slp loudmouth 1 .Full BMR suspension, Bilstein shocks. Torqhead 24x conversion.
02' SS, M6 BMR lowering springs, adj. pan-hard bar, Bilstein shocks. Lt1 front end conversion. Ford 9"
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03-10-2013, 04:04 AM
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#4
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Join Date: May 2008
Posts: 817
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350F & 250R spring rate...
so they lower the car 1.3" and barely add any rate up front (softer than a factory 1le spring) yet more than double the rate in the rear (to beyond almost any name brand spring for these cars)
I personally like a spring rate on the softer side for the rear of these cars, after numerous sets of springs. Here's a list of some rates just to give you an idea, my experience has been that linear springs ride nicer and feel more predictable in general over progressive springs
http://www.angelfire.com/my/fastcar/suspension.html
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|2000 Trans Am|T56 swap|Bolt Ons| Suspension|
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03-10-2013, 12:31 PM
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#5
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11 Second Club
Join Date: Feb 2008
Location: Edison, NJ
Posts: 4,620
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Quote:
Originally Posted by creeper
350F & 250R spring rate...
so they lower the car 1.3" and barely add any rate up front (softer than a factory 1le spring) yet more than double the rate in the rear (to beyond almost any name brand spring for these cars)
I personally like a spring rate on the softer side for the rear of these cars, after numerous sets of springs. Here's a list of some rates just to give you an idea, my experience has been that linear springs ride nicer and feel more predictable in general over progressive springs
http://www.angelfire.com/my/fastcar/suspension.html |
For the $45 that I spent on them, I will give the fronts a shot and probably just do the hose mod in the rear...
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1999 Z28 Convertible. 6 speed swap, wide cowl hood, full hockey stripes, and a whining 10 bolt.
2008 Sierra Vortec Max. 6.2 swapped, headers, Magnaflow catback, GMPP CAI, NHT optioned tow package.
2006 GTO, 11.48 @ 118.3
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03-10-2013, 04:04 PM
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#6
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Power Member
Join Date: Oct 2007
Location: Milford NJ
Posts: 1,526
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The problem is 250 for the rear spring rate it too much for a f body with a stock rear roll height. Chances are the car will oversteer pretty bad with that setup.
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03-10-2013, 04:45 PM
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#7
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Join Date: May 2008
Posts: 817
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Quote:
Originally Posted by NJ Torque
For the $45 that I spent on them, I will give the fronts a shot and probably just do the hose mod in the rear...
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Not a bad deal, but sometimes the cheaper springs end up with a more extreme drop than what is advertised, and/or sag over time. Also only adding 50# of rate probably won't compensate for the reduced travel, so you'll be hitting the stops more, but it will probably still ride pretty decent.
then again for $45 less than $45 you could have cut a coil from the stock spring, which by the equation...
k = (G*d^4)/(64*R^3*N)
k = spring rate
G = modulus of elasticity (material property)
d = wire diameter
R = mean radius of helix
N = number of coils
...would have yielded a spring rate in the 340 range anyway
either way, post pictures of the drop when done and do a review!
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|2000 Trans Am|T56 swap|Bolt Ons| Suspension|
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03-11-2013, 11:57 PM
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#8
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Join Date: Aug 2011
Location: Beachwood, NJ
Posts: 406
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I have the same springs and have yet to install them. Definitely post pics asap!
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'97 TA 5.7L/A4
sold
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03-13-2013, 09:16 PM
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#9
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Join Date: Dec 2009
Location: milltown
Posts: 1,497
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i just got eibach pros and bilstein shocks and struts, once they settle in i will post some pics, right now im looking at about an inch drop hoping to fall down another half inch
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2002 Camaro Sunset Orange Mettalic, V6, 5spd, bilstein HD shocks and struts, eibach pro lowering kit, eibach f/r sway bars, lakewood PHB, UMI 2 point subframe connectors, energy suspensions poly master bushing kit
daily econobox and first car
1986 IROC-Z, T56, MGW shifter, Heads, Cam, Holley Stealth Ram 350, t-top, tubular LCA with relo brackets, adjustable PHB, belltech sway bars, ground control weight jacks, SLP mid length headers, 3in w/borla XR1, RIP 3 10 bolts, 12.7 @ 109 so far.. atleast its faster than stock  SOLD
1971 Camaro LS3/T56/9in, cam only and still carbed, RIP 2 10 bolts, 11.62@121
03 Blazer 2 door - salt sponge
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03-14-2013, 12:04 AM
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#10
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Join Date: Dec 2012
Location: North Jersey
Posts: 222
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I bought the Bilstein kit. Came with Eibach springs that lowered the car 1". I also replaced all the chasis components. That kit is one of the best for the money. Car rides like New again.
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2002 N.H.R.A. Edition. M6 Full SLP exhaust, heads, cam, intake,maf, k&n filter, Bilstein shocks, Eibach springs, to much to list
1999 Z28 A4 upgraded brakes, cat back, computrr tune, Vette wheels. Bunch of little stuff
1994. Z28 A4 Full exhaust including SLP Long tubes, 3" ORY pipe, 3 in cat back, CAI, chip, maf,BMR A Arms, Panhard rod, torque arm,. Bilstein shocks, Eibach springs, transmission more, including street shift kit.
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06-03-2013, 01:46 PM
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#11
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^^^Lover of bad cars^^^ Meet Coordinator
Join Date: Aug 2007
Location: Whitehouse Station
Posts: 2,276
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I love my strano/koni set up... car handles sooooooooo much better
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1986 Honda VFR750 - 89.3HP to the wheel
2017 SS M6 - Mods: Nothing Yet.
2026 Tesla Model Y - lol
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06-15-2014, 10:58 PM
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#12
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11 Second Club
Join Date: Feb 2008
Location: Edison, NJ
Posts: 4,620
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Update; These were installed in a friends 2001 Z28 with OEM Bilsteins... Front drop was about 2" rear about 1"(did the hose mod, broght it down another 1/2"
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1999 Z28 Convertible. 6 speed swap, wide cowl hood, full hockey stripes, and a whining 10 bolt.
2008 Sierra Vortec Max. 6.2 swapped, headers, Magnaflow catback, GMPP CAI, NHT optioned tow package.
2006 GTO, 11.48 @ 118.3
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06-25-2014, 12:48 PM
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#13
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Join Date: Nov 2005
Location: Edison
Posts: 7,856
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Was this what you were doing to the black camaro a few weeks ago?
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1984 Firebird
2000 Z28
2023 Tacoma
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06-25-2014, 12:50 PM
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#14
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11 Second Club
Join Date: Feb 2008
Location: Edison, NJ
Posts: 4,620
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Quote:
Originally Posted by WayFast84
Was this what you were doing to the black camaro a few weeks ago?
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Possibly. And a slew of other things as well.
__________________
1999 Z28 Convertible. 6 speed swap, wide cowl hood, full hockey stripes, and a whining 10 bolt.
2008 Sierra Vortec Max. 6.2 swapped, headers, Magnaflow catback, GMPP CAI, NHT optioned tow package.
2006 GTO, 11.48 @ 118.3
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06-25-2014, 12:57 PM
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#15
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Join Date: Nov 2005
Location: Edison
Posts: 7,856
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Nice. I would've stopped by but I was running late to work.
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1984 Firebird
2000 Z28
2023 Tacoma
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08-01-2014, 04:53 PM
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#16
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13 Second Club
Join Date: Aug 2006
Location: Edison, NJ
Posts: 887
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I went through Eibach, and Hotchkis with adustable shocks were really bad when hitting bumps. The car sounded like it was going to rock apart. The Stranos springs were my last ones and I absolutely loved them but the car was just too low and damaging everything underneath. I have the SLP springs now which raised the car but I am just not happy with the new handling as the stranos and AGX shocks really kept the car grounded. I think I will change to new shocks to see if that improves it.
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08-01-2014, 05:41 PM
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#17
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^^^Lover of bad cars^^^ Meet Coordinator
Join Date: Aug 2007
Location: Whitehouse Station
Posts: 2,276
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I don't have clearance issues with my stranos
__________________
1986 Honda VFR750 - 89.3HP to the wheel
2017 SS M6 - Mods: Nothing Yet.
2026 Tesla Model Y - lol
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08-04-2014, 08:09 AM
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#18
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13 Second Club
Join Date: Aug 2006
Location: Edison, NJ
Posts: 887
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Quote:
Originally Posted by ThoR294
I don't have clearance issues with my stranos
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Im running big headers, and my turbo piping runs below as well. And if I switch to a Supercharger that also runs underneath also. I put a spike right through my header last year. I have all new equipment now and not chancing destroying it all. If you have all factory underneath then there isnt much to worry about.
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08-04-2014, 09:27 AM
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#19
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Sliderule / Moderator
Join Date: Oct 2004
Location: Catawissa PA
Posts: 2,294
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How low are you wanting to go? I have the SLP level II springs, they dropped the car about 3/4".
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93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada
1) Build it
2) Race it
3) Break it
4) Repeat!!!
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2001 Firebird, Formula M6 purchased brand new.
