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Alignment and Noise after Installing Coilovers

Hi everyone. Got the Z as my first sports car about a year and a half ago and just now started getting into mods. I've tried searching around and found

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Old 06-18-2017, 04:03 PM   #1 (permalink)
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Default Alignment and Noise after Installing Coilovers

Hi everyone. Got the Z as my first sports car about a year and a half ago and just now started getting into mods. I've tried searching around and found some good info, but I'm still unable to fully figure out exactly whats going on.

The first issue I'm having is the alignment. After a friend of mine installed Top Speed Pro 1 coilovers and rear camber arms, I took it to a local NTB next door to get it aligned. They were able to the toe back to spec, but even with the new adjustable camber arm, the tech was convinced that they couldn't do much with it at all. From what I've read, typically you want to stay in spec regardless. However the tech said the cambers fine given that its a lowered car. This is my first time getting into the mod scene so I have no baseline or prior knowledge. Thoughts on this? Facts? Attached my alignment results for reference.

The second issue I'm having is that after installing the coilovers, I can hear sounds coming from the rear. The sound is like hearing the car drive over gravel, but its constant. Has anyone had experience on how to fix this or what could be causing this noise? The friend that installed it with me double checked for things to be tightened, but maybe he missed something?

The intake and full CBE was fun, but the suspension so far has been more of a pain. I'm inclined to sell these coilovers and just go back to stock and save for Tein's, BC's, or KW's instead.

Thanks for anyone's help in advance!

-Matt
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Old 06-18-2017, 08:27 PM   #2 (permalink)
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The alignment tech is an idiot!
You got way too much rear camber unless you do trackdays daily. Or like wearing the inside of your tires out.
Take it to someone else who does lower cars.
What camber arms you have?
The noise you hear could be a spring binding up. Or something is rubbing.
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Old 06-18-2017, 10:20 PM   #3 (permalink)
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Yeap, that alignment guy is an idiot. You need to find a quality shop. That ain't it. As far as the noise in the rear. The most common issue is you did not put enough preload into it. Sounds like you need to tighten up on the shock and make it shorter to correct the issue.
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Old 06-18-2017, 10:44 PM   #4 (permalink)
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Op, a few of places I've used are Cobb Plano (now called Growler Motor Lab), Bobby Garett's Frame and Alignment, and last but not least Dallas Frame and Alignment. The last two are old school type places.

Not all alignment techs are equally skilled. Gotta go to guys that deal with highly adjustible parts.
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Old 06-19-2017, 12:01 AM   #5 (permalink)
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Thanks guys! I don't know what the hell I was thinking going to an NTB for something like this. I'll give Cobbs a call and see what they can do for me. Always awesome to see a local opinion.


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Old 06-19-2017, 07:28 AM   #6 (permalink)
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Some of these guys do not know the proper procedures in aligning a car. A dead give away is if the tech doesn't set the tire pressures before starting. I actually had a tech argue with me that he knew what he what doing. Needless to say that was the end of the alignment at that shop.
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Old 06-19-2017, 09:37 AM   #7 (permalink)
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FWIW, you may need to add new toes bolts with your new camber arms.
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