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#11 |
Join Date: Jun 2009
Location: I live at Devens, one run at a time
Posts: 454
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There's something that anyone lowering their car should look at before calling it done. Not likely to be a problem on a C4 unless you're going to the modern "big wheel" look and slamming the height, but I figured it worth adding to the discussion.
From front, look at the control arms - they should still angle noticably down toward the wheel. Similarly from the back, the halfshaft should still angle down toward the wheel. Now for my bastardized description of why: This is important to keep suspension travel from changing the virtual length of the arms too much. If you go so low as to start at rest with either of these angling up, you will have pronounced changes in the virtual arm length through jounce - making some surprising dynamic alignment changes. To demonstrate this, take a ruler and grasp it at both ends, holding it horizontally. Move one end up/down 1" and notice the small change in the "x axis" distance between the two ends. Now repeat the experiment with the arm starting at a 15degree angle - much greater change in the "x axis" length for the same up/down motion. Now picture how this gets more complicated when you add a second arm of a different length. Since the tire load is on the outside of the corner, it's more predictable if you prioritize this motion in jounce than in rebound, in other words that's why you don't shoot for dead level at rest. So if you find you get odd handling after lowering the car (right when you don't want it!) this is something to look at. I should add the C4 wants some "rake" to it - keep the rear higher than the front - since the rear suspension gets more stray motion (toe change) through its' sweep. This is why performance alignments run what seems like a lot of rear toe-in, it's pre-compensation so that it's about right when heavily loaded. HTH, - Jeff Last edited by batchman; 09-26-2014 at 12:38 PM. |
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#12 | |
![]() Join Date: Feb 2011
Location: San Marcos CA
Posts: 1,786
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I recently traded springs with another guy who wanted to lower his car (I wanted the stock ride height) and both our cars rode higher for a few days. |
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#13 | |
![]() Join Date: Oct 2013
Location: Wichita Falls,Tx
Posts: 594
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Last edited by USAZR1; 09-26-2014 at 04:18 PM. |
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#14 |
Join Date: Aug 2005
Location: Scottsdale, AZ
Posts: 2,446
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You get it too low, you will be hitting, headers, spoilers, curbs, speed bumps etc
I would assume alignment needed after this http://www.vbandp.com/instructions/c...c.html?start=5 |
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#15 | |
![]() Join Date: Dec 2006
Location: Montana
Posts: 64
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As for realignment, that's needed. Even with less than 1/2" drop, the steering feels sluggish or lazy which I presume is due to being out of alignment. I'm going to follow Mike100's suggestion of driving the car a bit and giving it time to settle before I decide if it's low enough. Once I get the height where I want it, an alignment will be next. Thanks to everyone for their input |
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#16 | |
![]() Join Date: Oct 2013
Location: Wichita Falls,Tx
Posts: 594
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![]() Yes,the shop did a four-wheel alignment on our 94,when finished. |
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#17 | |
![]() Join Date: Oct 2004
Posts: 1,884
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If you've replaced any suspension components or just some bushings and hardware the 'rumble strip' will prep it for the alignment, an alignment right after the replacement of components on the same rack without a drive is foolish. Last edited by WVZR-1; 09-26-2014 at 06:12 PM. |
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#18 |
![]() ![]() Join Date: May 2007
Location: Peoria, AZ
Posts: 9,120
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Yours is lowered Phil? Never noticed. Seriously....
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__________________
GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director ![]() 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V Last edited by GOLDCYLON; 09-27-2014 at 02:13 PM. |
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#19 |
Join Date: Aug 2005
Location: Scottsdale, AZ
Posts: 2,446
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great Pic, yes mine was lowered and had some scraping issues, raised it up a bit, much better but it is still lowered some
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#20 |
![]() ![]() Join Date: May 2007
Location: Peoria, AZ
Posts: 9,120
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Honestly never noticed Phil
__________________
GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director ![]() 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V |
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