#4043772 - 01/17/20 11:32 AM
CVLX feels quicker after new rear springs?
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Climber
Registered: 02/23/19
Posts: 571
Loc: Little Poland, CT
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I noticed my car had some issues with sagging when people would ride in the backseat, including one incident at the Jersey shore where she bottomed out so hard that it tripped the fuel cutoff switch. That one was kinda my fault, I did have me and 5 other people in the car at the time (what up bench seats!). Anyway, I decided to swap out the rear springs last weekend to try and alleviate this issue. After I did that, the car feels much quicker, particularly off of launches. Is my brain dumb, or do the stiffer springs actually do something to cause this?
_________________________
Current Panther:
1999 Crown Victoria LX - Toreador red, 18x8 Anthracite Torq Thrust M's, 3.31's w/DuraGrip LSD, 2.25" H-pipe duals w/Magnaflow XL mufflers and 4" tips, Moroso AOS, Kenwood eXcelon KMM-X704 head unit, PPI A600/4 4-channel amplifier, PPI i650.1 monoblock amplifier, big 3 upgrade, Pioneer 6x8 2-way speakers, two 12" JBL subs in sealed enclosures, 2/2019 to present
Past Rides:
2003 Buick Regal GS Joseph Abboud edition - traded in 2/2019
1996 Lincoln Town Car Signature - rear ended and totaled 5/2016
2002 Buick Rendezvous CXL - handed down to younger brother 2/2015
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#4043786 - 01/17/20 01:00 PM
Re: CVLX feels quicker after new rear springs?
[Re: Danger2manifold]
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Rookie
Registered: 12/18/13
Posts: 86
Loc: San Luis Obispo County
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I noticed this as well when I put cargo springs in my car. It's not actually faster (I timed it, still slow as molasses), it just feels better.
_________________________
2011 Civilian Crown Victoria LX "Black Betty," 148,xxx miles.
+2001 P-71 rear sway bar
+P71 aluminum driveshaft with Fabtech spacer
+Mo's Speed shop tune, economy 87 octane + performance E85 on SCT X4
+P71 airbox+MAF (stock zip tube, keeping the resonators)
+2002 Town Car rear seats
+Curt Class III trailer hitch
+Moog Heavy duty variable rate rear cargo springs
+Munroe Gas Magnum shocks all around
+3.73 Trac-Lok from an Explorer
+Forged P71 upper control arms.
It's a former rental!
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#4043798 - 01/17/20 03:38 PM
Re: CVLX feels quicker after new rear springs?
[Re: ClayBelt]
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3 Orange Whips
Metroplectic
Registered: 10/25/05
Posts: 29128
Loc: Cleveland, OH
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Stiffer springs reduce the amount of ass dragging that the car does and increase traction (up to a point), and the lack of ass dip, nose up action on acceleration is probably why she feels faster. Bingo. Much to the same way that a car feels faster after doing an upgrade to billet control arms.
_________________________
 '91 LTD Country Squire (POTM Mar. '19, Dec. '22) | '03 Marauder (POTM Nov. '10, Jul. '20)'18 Flex EB | '92 Shadow VT1100C formerly: '02 MGM, '04 MGM, '04 MGM v2.0, '04 MM, '07 P71 (POTM Feb. '18), '04 CVLX (POTM Jun. '19), '03 SAP P71, 2010 P7B (POTM Feb. '21)
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#4043802 - 01/17/20 04:16 PM
Re: CVLX feels quicker after new rear springs?
[Re: a_d_a_m]
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I know nothing
Posting Addict
Registered: 06/05/10
Posts: 19872
Loc: I can see Detroit from here!
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Stiffer springs reduce the amount of ass dragging that the car does and increase traction (up to a point), and the lack of ass dip, nose up action on acceleration is probably why she feels faster. Bingo. Much to the same way that a car feels faster after doing an upgrade to billet control arms. Exactly. Its wasting less time and energy compressing the rear suspension, effectively putting the power down to the wheels quicker. Same thing would happen if you put in firmer shocks all the way around.
_________________________
-Steve  2006 Audi A6 ~132k miles, stock. 1998 Mercury Grand Marquis LS HPP ~100k miles, slowly acquiring modifications. 1997 Town Car Cartier ~145k miles, Ported Plenum, Gutted Airbox, Contour E-fan Retrofit, Dual exhaust with Magnaflows, cats deleted, MSD Ignition, KYB Gas-A-Justs, P71 front bar, air ride reinstated, Projector retrofit, Caddy 4-note horn retrofit, Wood rim steering wheel retrofit, holistic weight reduction as the parts fall off.. 1996 Mercury Grand Marquis GS 117,485mi. R.I.P. 7/14/12 
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#4043886 - 01/18/20 01:48 AM
Re: CVLX feels quicker after new rear springs?
[Re: Danger2manifold]
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Climber
Registered: 02/23/19
Posts: 571
Loc: Little Poland, CT
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Sweet! I plan on doing the front springs and shocks in the spring, and having someone do the rear springs and control arms. Gonna actually feel like a car instead of a hovercraft
_________________________
Current Panther:
1999 Crown Victoria LX - Toreador red, 18x8 Anthracite Torq Thrust M's, 3.31's w/DuraGrip LSD, 2.25" H-pipe duals w/Magnaflow XL mufflers and 4" tips, Moroso AOS, Kenwood eXcelon KMM-X704 head unit, PPI A600/4 4-channel amplifier, PPI i650.1 monoblock amplifier, big 3 upgrade, Pioneer 6x8 2-way speakers, two 12" JBL subs in sealed enclosures, 2/2019 to present
Past Rides:
2003 Buick Regal GS Joseph Abboud edition - traded in 2/2019
1996 Lincoln Town Car Signature - rear ended and totaled 5/2016
2002 Buick Rendezvous CXL - handed down to younger brother 2/2015
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#4043992 - 01/18/20 09:58 PM
Re: CVLX feels quicker after new rear springs?
[Re: Danger2manifold]
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Banned
Over the Hill
Registered: 10/16/01
Posts: 3474
Loc: Shenandoah Valley
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Must be them envigorated springs?
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 ________________________________________ ____________________Problems huh? Then Read THE Book. Signed : Natural Borne Neanderthal .
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#4105432 - 04/17/21 03:47 PM
Re: CVLX feels quicker after new rear springs?
[Re: Danger2manifold]
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n00b
Registered: 07/11/20
Posts: 17
Loc: Kuwait
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Do you have the acdelco part numbers by any chance for the rears and the front?
Could you post pictures of how the car sits now?
_________________________
2001 Crown Victoria P72 GCC Specs (work in progress)
2012 Chevrolet Caprice 6.0L/6L80E LS GCC Specs Bone Stock (Daily)
2005 GMC 2500 Yukon XL 4wd 8.1/4L85E 2.5 Inch Lift Kit 285/75/16s
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#4105808 - 04/21/21 12:02 PM
Re: CVLX feels quicker after new rear springs?
[Re: Danger2manifold]
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Climber
Registered: 02/23/19
Posts: 571
Loc: Little Poland, CT
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Hey magic,
Front springs were ACDelco 45H0150, rears were 45H1137. I'll get a picture up in the next day or 2 to show how the car sits, just bear in mind that there's an extra 100 LB or so of subwoofers and amplifiers in the trunk
_________________________
Current Panther:
1999 Crown Victoria LX - Toreador red, 18x8 Anthracite Torq Thrust M's, 3.31's w/DuraGrip LSD, 2.25" H-pipe duals w/Magnaflow XL mufflers and 4" tips, Moroso AOS, Kenwood eXcelon KMM-X704 head unit, PPI A600/4 4-channel amplifier, PPI i650.1 monoblock amplifier, big 3 upgrade, Pioneer 6x8 2-way speakers, two 12" JBL subs in sealed enclosures, 2/2019 to present
Past Rides:
2003 Buick Regal GS Joseph Abboud edition - traded in 2/2019
1996 Lincoln Town Car Signature - rear ended and totaled 5/2016
2002 Buick Rendezvous CXL - handed down to younger brother 2/2015
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#4108056 - 05/08/21 10:13 AM
Re: CVLX feels quicker after new rear springs?
[Re: Danger2manifold]
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n00b
Registered: 07/11/20
Posts: 17
Loc: Kuwait
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Thanks I appreciate it!
And Would love to see pictures of the car and how it sits
_________________________
2001 Crown Victoria P72 GCC Specs (work in progress)
2012 Chevrolet Caprice 6.0L/6L80E LS GCC Specs Bone Stock (Daily)
2005 GMC 2500 Yukon XL 4wd 8.1/4L85E 2.5 Inch Lift Kit 285/75/16s
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#4109274 - 05/16/21 05:45 AM
Re: CVLX feels quicker after new rear springs?
[Re: Danger2manifold]
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n00b
Registered: 07/11/20
Posts: 17
Loc: Kuwait
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Any updates?
_________________________
2001 Crown Victoria P72 GCC Specs (work in progress)
2012 Chevrolet Caprice 6.0L/6L80E LS GCC Specs Bone Stock (Daily)
2005 GMC 2500 Yukon XL 4wd 8.1/4L85E 2.5 Inch Lift Kit 285/75/16s
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#4109406 - 05/17/21 11:21 AM
Re: CVLX feels quicker after new rear springs?
[Re: magic]
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Climber
Registered: 02/23/19
Posts: 571
Loc: Little Poland, CT
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Hey magic, Sorry about that! Here's a quick photo I shot yesterday for you: Looks like thisAgain, the rear sits a little bit lower than the front, but my trunk always has about 100 lb of stuff in it, so that's more on me than the springs
_________________________
Current Panther:
1999 Crown Victoria LX - Toreador red, 18x8 Anthracite Torq Thrust M's, 3.31's w/DuraGrip LSD, 2.25" H-pipe duals w/Magnaflow XL mufflers and 4" tips, Moroso AOS, Kenwood eXcelon KMM-X704 head unit, PPI A600/4 4-channel amplifier, PPI i650.1 monoblock amplifier, big 3 upgrade, Pioneer 6x8 2-way speakers, two 12" JBL subs in sealed enclosures, 2/2019 to present
Past Rides:
2003 Buick Regal GS Joseph Abboud edition - traded in 2/2019
1996 Lincoln Town Car Signature - rear ended and totaled 5/2016
2002 Buick Rendezvous CXL - handed down to younger brother 2/2015
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#4110486 - 05/25/21 09:16 PM
Re: CVLX feels quicker after new rear springs?
[Re: Danger2manifold]
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n00b
Registered: 07/11/20
Posts: 17
Loc: Kuwait
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Thanks man!
You got one clean panther!
I went with MOOG 9046, They feel the same as NN Springs.
_________________________
2001 Crown Victoria P72 GCC Specs (work in progress)
2012 Chevrolet Caprice 6.0L/6L80E LS GCC Specs Bone Stock (Daily)
2005 GMC 2500 Yukon XL 4wd 8.1/4L85E 2.5 Inch Lift Kit 285/75/16s
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