06-03-2020, 04:03 AM | #183 | |
Drives: Camaro ZL1 2018 AT10 Join Date: Jan 2019
Location: Poland
Posts: 11
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Quote:
Right now main problem is that the OEM ZL1 1LE rear cradle bushings are out of stock... (checked here https://www.gmperformancemotor.com/parts/84341929.html and https://wildhammermotorsports.com/ca...ssis-upgrades/ ). Wildhummer wrote me that even need wait for that part 6+ months... Then maybe somebody from you could help me get this part ? Or... BMR also have some this rear cradle bushings but in 3 options: https://www.bmrsuspension.com/?page=...=121&catid=472 What do you think ? |
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06-05-2020, 10:15 AM | #184 |
Drives: 2013 C6Z06 Join Date: Nov 2016
Location: PA
Posts: 1,577
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The BMR lockout kit greatly improves the rear end and installation is way less involved. Well worthwhile mod!
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06-06-2020, 11:28 AM | #185 | |
Geoff
Drives: 2020 ZL1 Green Join Date: May 2013
Location: Houston
Posts: 1,720
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This post has been SUPER helpful. I very much appreciate OP's honesty and candidness with his evaluation of the changes made to his car.
Apologies for bringing this up again, I see JCunningham's point however it is opposite to the instructions from GM. GM Performance specifically states to install the lower bushing first. I don't have my kit yet, still back-ordered, and don't know what the "nub" is that is causing the bushings not to touch both top/bottom of the cradle. Folks that have these installed and you followed the instructions, have you seen your alignment change or the cradle settle towards the upper bushing? Quote:
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06-06-2020, 12:05 PM | #186 | |
Drives: 2017 2SS M6 Join Date: Jun 2013
Location: WNY
Posts: 7,070
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Quote:
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real ZL1 wheels and brakes, 285/305 Michelin Pilot Super Sports, Pray ported Intake manifold, Soler Throttle Body, Rotofab intake, EFI Tuning Flex fuel kit, full American Racing Headers Exhaust, 1 7/8" w/ cats H pipe and mufflers. Full 1LE suspension, with BMR adjustable sway bars and links, GM aluminum cradle bushings, Hurst shifter with lighter reverse spring, TWM shifter knob, Tick level 1 transmission. I should have bought a ZL1
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06-06-2020, 12:42 PM | #187 | |
Drives: '17 ZL1 Join Date: Jul 2016
Location: Fairmont, WV
Posts: 1,558
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Quote:
This falls perfectly in line with my experience. You guys act like 1/16" difference in height between the cradle and body is going to be some major problem. My gap is opposite the instructions and I absolutely run the crap out of my car on the track. It hasn't moved a fraction. I could just as easily post some bogus theory about how the bushing would move the other direction. The assumption that the bushings will move within the cradle is wrong. It's a theoretical problem that doesn't happen. The cradle bushings aren't going to move...either direction...whether the gap is on the bottom or top... IT DOESN'T MOVE. If they could move, they would design them differently. Honestly, I regret posting the video trying to help people. No good deed goes unpunished I guess. If you're installing these, feel free to choose whatever method you want. A person can still use the method I posted and get the gap whichever side they choose. By all means, follow the directions, but if you screw up as I did, IT MAKES ZERO DIFFERENCE! Just make sure you get them all the same.
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Last edited by travislambert; 06-06-2020 at 09:52 PM. |
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06-06-2020, 01:48 PM | #188 |
Geoff
Drives: 2020 ZL1 Green Join Date: May 2013
Location: Houston
Posts: 1,720
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Thx Travis. Sameness is common sense.........not necessarily common
KISS, keep it simple
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06-06-2020, 11:58 PM | #189 |
Drives: 2017 2SS M6 Join Date: Jun 2013
Location: WNY
Posts: 7,070
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you and your authority have no idea what they're talking about. to many ****ing retards on this form that have no mechanical sense at all. If i can move those bushings down with a few wacks of a hammer they're going to eventually move and your cradles going to be crooked. but its your car so who gives a ****. This is a reason professionals dont come on forums.
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real ZL1 wheels and brakes, 285/305 Michelin Pilot Super Sports, Pray ported Intake manifold, Soler Throttle Body, Rotofab intake, EFI Tuning Flex fuel kit, full American Racing Headers Exhaust, 1 7/8" w/ cats H pipe and mufflers. Full 1LE suspension, with BMR adjustable sway bars and links, GM aluminum cradle bushings, Hurst shifter with lighter reverse spring, TWM shifter knob, Tick level 1 transmission. I should have bought a ZL1
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06-07-2020, 07:05 AM | #190 | |
Drives: '17 ZL1 Join Date: Jul 2016
Location: Fairmont, WV
Posts: 1,558
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Quote:
You're simply wrong about this, so please stop posting bogus theories on my thread. Go start a new thread and post all of the bad info you want. I won't intervene. The bushings don't move. You just have a theory with no evidence...I have the real-world tested counterexample to your theory in my garage. It would literally take something as severe as a car accident to get them to move. In a car accident, it isn't going to make a difference whether you put that negligible gap on the top or bottom, it could move either way. Even if they did move, the movement of the bushing alone isn't going to change the alignment. Anything that would impact the alignment in any meaningful way is self-contained within the cradle. Even if the bushings moved on just one side and not the other, which again, they don't move, the cradle's relationship to the ground, the toe, the camber, the sway bar, nothing changes because it's all self-contained within the cradle assembly. The only suspension pieces that bridge the gap between the cradle and body are the the shocks and springs. Again assuming the bushings move, which they don't, a 1/16" side-to-side difference in the compression of the springs and shocks isn't going to make any difference. There's probably more delta than that naturally just due to the fact that the weight of the car isn't perfectly distributed. If you think about the weight distribution differences between drivers of different weight, or even the difference between passenger/no passenger, it's easy to see the compression of the springs and shocks is going to differ by more than 1/16" side-to-side.
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Last edited by travislambert; 06-07-2020 at 08:13 AM. |
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06-07-2020, 09:32 AM | #191 | ||
Drives: 2017 1SS 1LE Join Date: Jun 2016
Location: Detroit, MI
Posts: 1,001
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Quote:
If you do manage to get enough energy transferred to vertically moce the cradle on the mounts like that, there's likely a) some suspension component that's binding that or otherwise damaged and requires replacing, b) hit something so hard that other suspension components are likely damaged, or c) something hit the cradle directly. Any of these scenarios would be known to the driver if they pay any attention to how their vehicle feels normally and would require at least an alignment check if not an actual alignment. The change in instructions doesn't invalidate the old instructions, it was probably just done to make the cradle more robust to moving in situations like this and it might as well be done that way since it's free. It's also better in terms of tolerances since the only tolerance you have between the cradle and body is the thickness of the upper flange rather than the stack of tolerances through the entire bushing, but in actuality is negligible.
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2017 SS 1LE.
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06-08-2020, 08:34 AM | #192 |
Drives: Hyper Blue 2016 2SS 6M Join Date: Sep 2017
Location: North Ga
Posts: 1,786
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I installed the solid bushings a few weeks ago. For what it's worth, I installed the top bushings flush with the cradle. I was very surprised that my alignment was still spot on. I knew the car felt fine, but was certainly surprised that the alignment was unaffected.
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Baby Blue
2016 Hyper Blue 2SS/6m/MRC/NPP/Silver Rally stripes/ZL1 wheels & brakes/GForce DS and axles/ZLE Cradle Bushings/FE4 ARB front & rear/SEMA Grill/Rotofab dry/95mm TB/Magnuson 2300/Full LT4 fuel system/JMS boost-a-pump/E85 Sensor/Ported CID heads from LME/Cammotion PD cam/Thompson Motorsports forged shortblock/catted Kooks 1 7/8 headers /JRE remote tuned |
06-15-2020, 11:30 PM | #193 |
Drives: Chevrolet Camaro, Ford Mustang Join Date: Oct 2019
Location: AZ
Posts: 388
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3 questions:
What is the difference between the BMR Delrin and the BMR Lock out? From the pics, the lock out kit seems to still use rubber bushings? So would the delirin setup be most preferred for the track? What about whichever is best from BMR vs. GM Solid Cradle Bushing Kit? Which is best? If converting a ZL1 with factory MRC shocks, what do you need to do if swapping to a 1LE DSSV shock setup? Do they make cancellors for the MRC Electronics? Best regards, Dave
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2022 SS 1LE - Vivid Orange - SCCA CAM-C & Optima Ultimate Street Car GT
Katech, MSD, QA1, Hurst, Anderson Composites, ProParts USA Custom Suspension, MFR Engineering, Forgeline Wheels, G-Loc Brakes, Nine Lives Racing, MTX Audio, Penske Rapid Repair |
06-16-2020, 08:37 AM | #194 | |
Drives: 2017 1SS 1LE Join Date: Jun 2016
Location: Detroit, MI
Posts: 1,001
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Quote:
2) I'd argue GMs are the better choice than delrin for quality. Not only did GM fully test the Al on the ZL1 1LE (while BMR likely did not), aluminum has higher strength even though it's not quite as stiff IIRC. From a driving perspective, both would be a significant improvement over the stock bushings and I doubt many would be able to feel the stiffness difference between the two materials. 3) Yes, there are resistors you can buy to fake out the damper controller. Here's one example: https://www.phastekperformance.com/a...6-401002-n.htm
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2017 SS 1LE.
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06-16-2020, 10:42 AM | #195 |
Drives: '17 ZL1 Join Date: Jul 2016
Location: Fairmont, WV
Posts: 1,558
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I have the KW kit for the MRC delete. I was pretty impressed by the quality and I've never had a single hiccup with it.
https://wildhammermotorsports.com/ca...w-suspensions/
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07-03-2020, 10:55 AM | #196 |
Drives: Chevrolet Camaro, Ford Mustang Join Date: Oct 2019
Location: AZ
Posts: 388
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I just got the 1LE aluminum bushing cradle kit, from GM. Took about 1 month to get. Instructions still say bottom bushing first. I’d like to see a copy and version number of a different set of instructions.
Here’s my pic, which just arrived new yesterday. Best Regards, Dave
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2022 SS 1LE - Vivid Orange - SCCA CAM-C & Optima Ultimate Street Car GT
Katech, MSD, QA1, Hurst, Anderson Composites, ProParts USA Custom Suspension, MFR Engineering, Forgeline Wheels, G-Loc Brakes, Nine Lives Racing, MTX Audio, Penske Rapid Repair |
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