03-15-2011 | #11 | |
Join Date: Aug 2006
Location: McLean, VA
Posts: 3,725
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Re: Ride and suspension questions
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Glad to hear all is well. Jim and I have replaced rear bushings with poly versions. In my case those were four dog bone bushings (trailing arms), struts (the member w/ camber adjustment under the diff) and shock uppers. Make the long story short, after the work backg off the Jim's lift ramp , as the rear whels hit the draive way we both heard a distint snap one time and figured out it was poly binding unloading as the rear went into compression hitting the driveway. Then I realized combination of different material (rubber originally) resulted in different pivot location. Factory rubber bushings looked like they were bonded to inside of the barrel and, like one of the post, pivot seemed to be between the bolt and the metal sleeve inside the rubber bushing. For the poly, pivot actually occurs between poly outer and inside barrel of aluminum extrusions. I ended up removing dogbones and structs and re-applying thick layer of sillicone grease (I bought an extra jar of this stuff. What comes in the package just wasn't enough) and reinstalling. I hope sharing my experience helps. |
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03-24-2011 | #12 | |
Join Date: May 2010
Location: Japan
Posts: 3,588
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Re: Ride and suspension questions
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Thanks again and take care.
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Craig "ZR-1 NO KA 'OI" "ZR-1 ICHIBAN" 1995 #228 Black/Black with Dunn Heads ZR-1 owner since September 2003 ZR-1 Net Registry Founding Member #0074 NCM Lifetime Member #2048 |
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03-24-2011 | #13 |
Join Date: May 2007
Location: Peoria, AZ
Posts: 9,155
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Re: Ride and suspension questions
Reading this on the rear shocks Craig (Hanging in the air) yeah it maybe time to replace those. I do not suggest the morocca valving unless you are planning on x-crossing the car. I also ditched the rear trailing arms (Dog bones) for the Banski Heim Traing arms. A hell of an improvement. When I went to coil overs we had to use a Guldstrand front sway bar relocator set up. If I remember the poly bushing were too "FAT" and had to be ground down a little for freedom of movement. Im wondering if your issue up front is binding causing a dampening or bouncing response?
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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 |
03-24-2011 | #14 | |
Join Date: May 2010
Location: Japan
Posts: 3,588
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Re: Ride and suspension questions
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__________________
Craig "ZR-1 NO KA 'OI" "ZR-1 ICHIBAN" 1995 #228 Black/Black with Dunn Heads ZR-1 owner since September 2003 ZR-1 Net Registry Founding Member #0074 NCM Lifetime Member #2048 |
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03-24-2011 | #15 | |
Join Date: May 2007
Location: Peoria, AZ
Posts: 9,155
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Re: Ride and suspension questions
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No sweat yep I bought the right size as well but for some reason they needed to go on the Weight Control Program lol. The trailing arm mod is really some thing you have to consider if you go to coil overs as the rear dog bones would need to be shaved as well to allow for clearance. It gets a little tight in there with the hypercoil springs in the way. Carters rear adaptor plate may have solved this problem but I am not sure as he didnt finsh in time for my project. Mine (rears) were installed the old school way by notching forward in order to allow the top hats freedom to clear. BTW Craig glad to hear you are all right.
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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; 03-24-2011 at 10:55 PM. |
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03-26-2011 | #16 | |
Join Date: May 2010
Location: Japan
Posts: 3,588
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Re: Ride and suspension questions
Quote:
__________________
Craig "ZR-1 NO KA 'OI" "ZR-1 ICHIBAN" 1995 #228 Black/Black with Dunn Heads ZR-1 owner since September 2003 ZR-1 Net Registry Founding Member #0074 NCM Lifetime Member #2048 |
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03-26-2011 | #17 |
Join Date: Aug 2008
Location: Houston 90 Red ZR-1
Posts: 2,320
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Re: Ride and suspension questions
I did a complete poly rebushing with the Prothane kit of the entire car front to back. I absolutely loveit love it love it. It is a stiffer ride. But not a bouncy springy feeling ride at all. Its a more planted feel with much less body roll around corners. Im not even running the Bilstiens. Im running KYB's which is nothing special. Bilsteins and actuators are in a box.
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03-26-2011 | #18 | |
Join Date: May 2010
Location: Japan
Posts: 3,588
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Re: Ride and suspension questions
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__________________
Craig "ZR-1 NO KA 'OI" "ZR-1 ICHIBAN" 1995 #228 Black/Black with Dunn Heads ZR-1 owner since September 2003 ZR-1 Net Registry Founding Member #0074 NCM Lifetime Member #2048 |
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03-27-2011 | #19 |
Join Date: Dec 2004
Location: Jacksonville, FL USA
Posts: 4,645
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Re: Ride and suspension questions
Craig, I put a poly sway bar kit, ends & frame mounts, in my car when I replaced the A-arms with NOS units. The result was more energy transmitted to the frame because the poly bushings do little to absorb any road harshness.
The first thing I noticed when I drove it is yes the response is crisp, but the bad roads where I live are coming thru the chassis more. It feels like it darts and it feels like it bounces the whole car more. When I get to smooth road it feels great & steering response is precise. However there is still a go kart bounce & harshness that I can feel. The issue is that the poly does nothing to absorb it is too rigid so it transmits...Dave McLellan talks about this in the suspension/chassis chapter in his book. That's why it's not OEM. Any rigid ( or more rigid ) bushing system will transmit energy to the chassis with a negative effect on ride and it will require more work from the driver to pay attention. The rubber absorbs most of the junk that would make us have to concentrate more on what the car is responding to...the extra energy input. That bit I got from the guys at VB&P when I inquired about their heim jointed suspension parts. This is also consistent with what Dave says in his book. just my two cents.... Tom
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1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member |
04-01-2011 | #20 | |
Join Date: May 2010
Location: Japan
Posts: 3,588
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Re: Ride and suspension questions
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Thanks for taking the time to share your experience. Gosh, I hate to think what I am experiencing is normal when doing the poly bushings mod. I'll check it all out when it arrives and maybe on the better roads here in Japan it won't seem so bad. It does handle and feel much better for sure and no regrets about that part. I knew I would be giving up comfort and just hope parts don't start falling off the Z since it seems to rattle much more now too. Take care, Craig
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Craig "ZR-1 NO KA 'OI" "ZR-1 ICHIBAN" 1995 #228 Black/Black with Dunn Heads ZR-1 owner since September 2003 ZR-1 Net Registry Founding Member #0074 NCM Lifetime Member #2048 |
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