Excessive bounce with Eibach? - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

lexlueger · 06-28-2010, 04:20 PM

Thanks for the suspension lesson guys! Now I have a better grasp on what's going on with the car. One more week and I would have bought new springs

...

JusticePete · 06-28-2010, 04:47 PM

You're welcome.

Droid6 · 06-28-2010, 09:54 PM

Quote:

Originally Posted by JusticePete

You are correct. A substantial amount of the OP's bounce is coming from uneven preloads in the bushes.

Think of it this way. If you removed your lower front control arm and set it in a vice by clamping down hard on the steel ferule bonded to the rubber bush would it hold straight. The answer would be yes. Is the jaws grip the ferule as tight as the bolt on the car you can raise of lower the arm, but with resistance. When you release it, it will spring back to where it was before you twisted the rubber around the ferule. That is why bushes must be timed to ride height.

Take your car to the alignment shop. Have the tech loosen every rotational bolt / bush in the suspension. Drive the car SLOWLY and CAREFULLY around the lot with the bolts a couple of turns loose. Put it back on the alignment lift. Without taking any weight off the wheels, tighten all the bolts. All the bushes are now timed to your new lowered ride height.

I was going to get springs as my next upgrade. Should everyone who swaps there springs do this or just those with issues. I was going to install the springs myself, besides following the instructions meticulously is the some special magic I should perform to make sure they sit right?

JusticePete · 06-28-2010, 10:25 PM

Quote:

Originally Posted by Droid6

I was going to get springs as my next upgrade. Should everyone who swaps there springs do this or just those with issues. I was going to install the springs myself, besides following the instructions meticulously is the some special magic I should perform to make sure they sit right?

The instructions plus timing the bushes will get the job done without any magic.

Droid6 · 06-28-2010, 10:55 PM

Quote:

Originally Posted by JusticePete

The instructions plus timing the bushes will get the job done without any magic.

You're a bad ass!

lexlueger · 06-28-2010, 11:04 PM

Edlocs · 06-28-2010, 11:18 PM

Quote:

Originally Posted by JusticePete

You are correct. A substantial amount of the OP's bounce is coming from uneven preloads in the bushes.

Think of it this way. If you removed your lower front control arm and set it in a vice by clamping down hard on the steel ferule bonded to the rubber bush would it hold straight. The answer would be yes. Is the jaws grip the ferule as tight as the bolt on the car you can raise of lower the arm, but with resistance. When you release it, it will spring back to where it was before you twisted the rubber around the ferule. That is why bushes must be timed to ride height.

Take your car to the alignment shop. Have the tech loosen every rotational bolt / bush in the suspension. Drive the car SLOWLY and CAREFULLY around the lot with the bolts a couple of turns loose. Put it back on the alignment lift. Without taking any weight off the wheels, tighten all the bolts. All the bushes are now timed to your new lowered ride height.

I had the eibach springs and sway bars installed and noticed extra bounce in the suspension. I always thought it was due to the lowered springs, but now I will take it to an alignment shop and ask them to do what you recommend. Thanks for advice

flht99b · 06-29-2010, 06:15 AM

" Have the tech loosen every rotational bolt / bush in the suspension. Drive the car SLOWLY and CAREFULLY around the lot with the bolts a couple of turns loose. Put it back on the alignment lift. Without taking any weight off the wheels, tighten all the bolts. All the bushes are now timed to your new lowered ride height. "

I've looked at all the sellers of lowered springs instructions and no one mentions this step. I wonder just how many folks or install shops either drop spring or coil over users actually loosened every suspension point and recenter the bushings. I was well aware of this step but this thread seems to be the first to mention it is necessary.
Ed M.

RedJewel2SS · 06-29-2010, 09:06 AM

Quote:

Originally Posted by flht99b

" Have the tech loosen every rotational bolt / bush in the suspension. Drive the car SLOWLY and CAREFULLY around the lot with the bolts a couple of turns loose. Put it back on the alignment lift. Without taking any weight off the wheels, tighten all the bolts. All the bushes are now timed to your new lowered ride height. "

I've looked at all the sellers of lowered springs instructions and no one mentions this step. I wonder just how many folks or install shops either drop spring or coil over users actually loosened every suspension point and recenter the bushings. I was well aware of this step but this thread seems to be the first to mention it is necessary.
Ed M.

i'm guessing it is just the brand of springs you got.

no offense to anyone out there but i have HEARD (not experienced) that the eibach springs are soft, like they took the stock springs and just cut an inch off.

Droid6 · 06-29-2010, 10:00 AM

Quote:

Originally Posted by RedJewel2SS

i'm guessing it is just the brand of springs you got.

no offense to anyone out there but i have HEARD (not experienced) that the eibach springs are soft, like they took the stock springs and just cut an inch off.

I saw that same quote but it was just somebody who doesn't own the springs randomly throwing it out there.

JusticePete · 06-29-2010, 10:22 AM

Quote:

Originally Posted by flht99b

" Have the tech loosen every rotational bolt / bush in the suspension. Drive the car SLOWLY and CAREFULLY around the lot with the bolts a couple of turns loose. Put it back on the alignment lift. Without taking any weight off the wheels, tighten all the bolts. All the bushes are now timed to your new lowered ride height. "

I've looked at all the sellers of lowered springs instructions and no one mentions this step. I wonder just how many folks or install shops either drop spring or coil over users actually loosened every suspension point and recenter the bushings. I was well aware of this step but this thread seems to be the first to mention it is necessary.
Ed M.

This is something that should be done whenever ride height is changed. It takes some time and effort and that is why IMO that this step is skipped. What I have not mentioned in this thread is if you skip this step it can lead to premature wear and or failure of the rubber bushes. The rear lower in control arm bush is a steel jacketed bush. It is never going to adjust by itself to the new ride height. It will only fatigue into a more relaxed state. Other bushes that are rubber could in theory eventually rotate to the proper position, but the OE design is that the ferule twist and the bush not rotate.

I cannot speak to why this is not standard operating procedure for other companies because it is the correct way to do the job.

lexlueger · 07-01-2010, 08:10 PM

Ok, got the bushings loosened and centered and..... The car is worse than ever! WTF

. Tons of lateral movement now from the rear. It feels like the rear end wants to "step-out" even at moderate speeds. What are they doing wrong!!!

JusticePete · 07-01-2010, 09:09 PM

Quote:

Originally Posted by lexlueger

Ok, got the bushings loosened and centered and..... The car is worse than ever! WTF

. Tons of lateral movement now from the rear. It feels like the rear end wants to "step-out" even at moderate speeds. What are they doing wrong!!!

Can you please post your detailed alignment specifications?

lexlueger · 07-01-2010, 11:04 PM

I do not have them.

...

06-28-2010, 04:20 PM	#15
lexlueger Drives: V10 BMW M5, Supercharged 2SS/RS Join Date: Jun 2010 Location: Charlotte NC /Brooklyn NY Posts: 2,305	Thanks for the suspension lesson guys! Now I have a better grasp on what's going on with the car. One more week and I would have bought new springs ... __________________ MAST 416 STROKER: STAGE 3 TVS 2300 CUSTOM CAM TPIS 102 TB IW 8 RIB PULLEY W/ OD COG REARS NX EXPRESS/NANO KIT KDI HEAT EXCHANGER/ROTOFAB RESERVOIR CIRCLE D 2800 TC/FLEX PLATE/ADM TRANS COOLER DSS DRIVESHAFT/1400 HP AXLES EATON TRUETRAC -LPE 3.27 GEARS DYNATECH HEADERS/MAGNAFLOW EXHAUST SQUASH RETURN STYLE FS ID 850's E85/ FLEXFUEL BMR/EIBACH SUSPENSION KILL MODE, ON.

06-28-2010, 11:04 PM	#20
lexlueger Drives: V10 BMW M5, Supercharged 2SS/RS Join Date: Jun 2010 Location: Charlotte NC /Brooklyn NY Posts: 2,305	__________________ MAST 416 STROKER: STAGE 3 TVS 2300 CUSTOM CAM TPIS 102 TB IW 8 RIB PULLEY W/ OD COG REARS NX EXPRESS/NANO KIT KDI HEAT EXCHANGER/ROTOFAB RESERVOIR CIRCLE D 2800 TC/FLEX PLATE/ADM TRANS COOLER DSS DRIVESHAFT/1400 HP AXLES EATON TRUETRAC -LPE 3.27 GEARS DYNATECH HEADERS/MAGNAFLOW EXHAUST SQUASH RETURN STYLE FS ID 850's E85/ FLEXFUEL BMR/EIBACH SUSPENSION KILL MODE, ON.

06-29-2010, 06:15 AM	#22
flht99b Drives: 2010 Camaro 2SS/RS RJT Join Date: May 2009 Location: Knoxville Posts: 1,584 View My Garage	" Have the tech loosen every rotational bolt / bush in the suspension. Drive the car SLOWLY and CAREFULLY around the lot with the bolts a couple of turns loose. Put it back on the alignment lift. Without taking any weight off the wheels, tighten all the bolts. All the bushes are now timed to your new lowered ride height. " I've looked at all the sellers of lowered springs instructions and no one mentions this step. I wonder just how many folks or install shops either drop spring or coil over users actually loosened every suspension point and recenter the bushings. I was well aware of this step but this thread seems to be the first to mention it is necessary. Ed M. __________________ RJT 2SS/RS, AAM 3.70's, MTI Sway Bars, Shifter, SS brake lines ZLI calipers, rotors/pads BMR Trailing & Toe Arms, rear cradle/diff bushes, Pedders XA's, Camber/Toe eccentrics, Radius arm inserts, GTO clutch reservoir, LS9 cam, Comp valve springs, Melling 10296 oil pump, CR5 timing chain, LS6 damper, CAI Cold Air Intake, ARH LT headers, HF cats, GMPP axle back, Elite Eng Catch Can, Black ZL1 20x10 & 2011 whls 285/35/20 & 305/35/20 General G-Max RS, 2011 Convertible spoiler, 1LE front spoiler, Lloyd "SS" Floor Mats, GM Camaro Trunk Mat, wrapped console, hand brake lever, Grant steering whl.

07-01-2010, 08:10 PM	#26
lexlueger Drives: V10 BMW M5, Supercharged 2SS/RS Join Date: Jun 2010 Location: Charlotte NC /Brooklyn NY Posts: 2,305	Ok, got the bushings loosened and centered and..... The car is worse than ever! WTF. Tons of lateral movement now from the rear. It feels like the rear end wants to "step-out" even at moderate speeds. What are they doing wrong!!! __________________ MAST 416 STROKER: STAGE 3 TVS 2300 CUSTOM CAM TPIS 102 TB IW 8 RIB PULLEY W/ OD COG REARS NX EXPRESS/NANO KIT KDI HEAT EXCHANGER/ROTOFAB RESERVOIR CIRCLE D 2800 TC/FLEX PLATE/ADM TRANS COOLER DSS DRIVESHAFT/1400 HP AXLES EATON TRUETRAC -LPE 3.27 GEARS DYNATECH HEADERS/MAGNAFLOW EXHAUST SQUASH RETURN STYLE FS ID 850's E85/ FLEXFUEL BMR/EIBACH SUSPENSION KILL MODE, ON.

07-01-2010, 11:04 PM	#28
lexlueger Drives: V10 BMW M5, Supercharged 2SS/RS Join Date: Jun 2010 Location: Charlotte NC /Brooklyn NY Posts: 2,305	I do not have them. ... __________________ MAST 416 STROKER: STAGE 3 TVS 2300 CUSTOM CAM TPIS 102 TB IW 8 RIB PULLEY W/ OD COG REARS NX EXPRESS/NANO KIT KDI HEAT EXCHANGER/ROTOFAB RESERVOIR CIRCLE D 2800 TC/FLEX PLATE/ADM TRANS COOLER DSS DRIVESHAFT/1400 HP AXLES EATON TRUETRAC -LPE 3.27 GEARS DYNATECH HEADERS/MAGNAFLOW EXHAUST SQUASH RETURN STYLE FS ID 850's E85/ FLEXFUEL BMR/EIBACH SUSPENSION KILL MODE, ON.

06-28-2010, 04:47 PM	#16
JusticePete Drives: Camaro Justice Join Date: Jun 2007 Location: Virginia Posts: 20,171	You're welcome.

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