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#1 |
![]() Join Date: Nov 2010
Location: Omaha
Posts: 402
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Adjusting the ride height on my new to me Admiral Blue ZR-1 with DRM coilovers and FX3 shocks. Any suggestions for best height for good ride comfort? Scott had it super low, which looked great, but had some pretty significant bounce on bumps. It was not even 1 finger between the front tires & fender, and barely over 1 finger between the rear tires & fender. I've brought the front up to 2 fingers between the fender and tire, and the rear is between 2-3 (just over 2 on the left, full 3 on the right). The ride is better, but still has some noticeable bounce on bumps, I'm thinking I probably need to go a little higher in front, call it 2.5 fingers, and maybe 3.5 finger widths on the rear. Thoughts or suggestions?
Ride height when I bought it: After first adjustment:
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Evan
2023 70th C8 HTC, 94 Admiral Blue ZR-1 SOLD - 2012 Carlisle Blue Metallic ZR1 - 800HP SOLD - Steel Blue 91 391cid ZR-1 #391 SOLD - Black 91 ZR-1 |
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#2 |
![]() Join Date: May 2010
Location: Japan
Posts: 3,572
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I am watching this post as I am planning to finally get mine done after all these years. Same setup, but not sure what spring rates you are running? Mine are 425 front and 250 rear as recommended by Randy for my use. I cannot go too low and want a decent ride. I do not have a stock front bumper and have my custom carbon fiber ARP front splitter to protect.
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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 ![]() Last edited by HAWAIIZR-1; 08-08-2023 at 07:42 AM. |
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#3 |
![]() Join Date: Nov 2010
Location: Omaha
Posts: 402
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Not sure on the spring rate, they seem fairly soft and if I remember correctly 425/250 was the common spring rate for DRMs. The problem with going too low is the car becomes really "bouncy" on bumps. I went a little too low on the previous steel blue car, and just lived with it. Scott had this one all the way down, and it was noticeably worse for the bounce. Options are either go with a stiffer spring or raise it back up. Going with a stiffer spring and running low should really be matched by changing shocks to something designed for the shorter travel. This isn't going to be a track car (at least not often), so I'd rather keep the FX3 and raise it back up to a height where it's comfortable. It may take me a few weeks, but I'll keep updating here so you can see my results.
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Evan
2023 70th C8 HTC, 94 Admiral Blue ZR-1 SOLD - 2012 Carlisle Blue Metallic ZR1 - 800HP SOLD - Steel Blue 91 391cid ZR-1 #391 SOLD - Black 91 ZR-1 |
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#4 |
![]() Join Date: May 2010
Location: Japan
Posts: 3,572
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Thanks Evan! It sounds like a pain in the arse to dial it in a get it right where one wants it with a lot of patience. Hopefully someone else with the same setup with chime in. I really want to install my set.
Sent from my iPhone using ZR-1 Net Registry
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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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#5 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,697
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IIRC, mine are 425/300. Also, using 18/19? wheels helps give the car a ?raked? look w/o the necessity of lowering too far.
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX Last edited by XfireZ51; 03-08-2024 at 02:02 PM. |
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#6 |
![]() Join Date: Aug 2012
Location: Ellicott City, MD
Posts: 1,676
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Sitting perfect!
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Charlie __________ Dredgeguy WAZOO Member 1992 Bright Red/Black ZR1 #246 Dana 4:10 gears Polished LT5 by Haibeck Polished Fikse FM5's with Michelin Pilot Sport 2 Stainless Works headers and cats with Corsa |
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#7 |
![]() Join Date: Jan 2012
Location: Florence, SC
Posts: 1,343
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My 94 is on QA1's. The rears are 425, can't remember the fronts. I've got about 1.5 fingers front and back. She's stiff but not bad. A little bounce over rough spots. Very comfortable over all.
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Jim Zorgias ![]() 1994 ZR-1 Admiral Blue/Black #245 1996 Callaway Supernatural 450 1990 Callaway Supernatural 490 / CR-1 #7 |
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#8 |
![]() Join Date: Aug 2013
Location: Philadelphia, PA
Posts: 81
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I originally had 275lb springs on the rear per Randy's recommendation. But I have the car cranked pretty low so I was on the bump stops too often. I changed to 350lb springs and it rides much better.
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#9 |
![]() Join Date: Aug 2018
Location: Finksburg, MD
Posts: 244
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I'll get new measurements tomorrow but when I talked to different people with lowered ZR1/Callaways about ride height, I was told:
Front: 25 3/4- 26" Rear: 26 5/16-27" Im pretty sure Im lower in both regards but im also running Ridetech coilovers. Front geometry should be the same (Ridetech shocks are Fox units made for this kit) and rear geometry is mounted differently from what I understand. I've got no issues with bump or rebound and could likely go lower without detriment in ride quality but wanted to be able to clear a speed bump in my neighborhood.
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1994 #353 "Bluey" Last edited by Prez1967; 08-17-2023 at 05:32 PM. |
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#10 |
![]() Join Date: Nov 2010
Location: Omaha
Posts: 402
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Adjusted the rears up some more, I'm now right at 5" to the frame rail in front and right at 5.25-5.5" at the rear. The ride is better but still has some bounce, but nothing near as bad as it was before. I may just have to do stiffer rear springs as I really don't want to go any higher. Of course, I could just pull the whole setup and replace with VanSteel's DA4 max lowering setup.
![]() Rear coilover after adjusting: ![]()
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Evan
2023 70th C8 HTC, 94 Admiral Blue ZR-1 SOLD - 2012 Carlisle Blue Metallic ZR1 - 800HP SOLD - Steel Blue 91 391cid ZR-1 #391 SOLD - Black 91 ZR-1 Last edited by EvanZR1; 08-17-2023 at 07:23 PM. |
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