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Sinking Corvette?!!?!

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Old Jul 30, 2014 | 04:39 PM
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Default Sinking Corvette?!!?!

Roughly one year ago I decided to go with a set of HRE wheels at a local speed shop. In addition to the new wheels and tires, they also lowered my car on the stock bolts, which finished the look nicely, but I feel like the car is lower now than last summer! Is it possible the car is dropping gradually over time or is it my imagination? Has anyone else observed this occuring on their lowered corvettes?
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Old Jul 30, 2014 | 04:50 PM
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Yes, it seems they all do, my father 2005 did and my 2009 with 18k on it has. I used to be able to put a jack under it with pucks to lift it, now I have to pull up a little on the fenders to get the jack under there.
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Old Jul 30, 2014 | 04:51 PM
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Originally Posted by Velocita
Roughly one year ago I decided to go with a set of HRE wheels at a local speed shop. In addition to the new wheels and tires, they also lowered my car on the stock bolts, which finished the look nicely, but I feel like the car is lower now than last summer! Is it possible the car is dropping gradually over time or is it my imagination? Has anyone else observed this occuring on their lowered corvettes?
Check the lowering bolts and make.sure they are not loose other than that I don't see how your car could slowly be sinking.
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Old Jul 30, 2014 | 06:31 PM
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Originally Posted by Eppieguy
Yes, it seems they all do, my father 2005 did and my 2009 with 18k on it has. I used to be able to put a jack under it with pucks to lift it, now I have to pull up a little on the fenders to get the jack under there.
Same here. 2008 Coupe. Quite surprised when my jack would no longer go under it. It's gotta be springs weakening and/or reduced gas pressure in the shocks. Tire wear, maybe. Yeah, ride height bolt pads could have issues too. A combination of all the above?
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Old Jul 30, 2014 | 06:51 PM
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thanks for the replies... so are you adjusting the ride height every year or so? seems crazy, but I guess it is necessary.
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Old Jul 30, 2014 | 07:09 PM
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I really can't see your ride hight changing from worn springs, worn shocks, etc, I guess it could over a 10 year period or so but you would be talking tenths of a inch. My 08 has not change at all since I purchased it New.
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Old Jul 30, 2014 | 08:18 PM
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Originally Posted by okie08vette
I really can't see your ride hight changing from worn springs, worn shocks, etc, I guess it could over a 10 year period or so but you would be talking tenths of a inch. My 08 has not change at all since I purchased it New.
.08 with 50k is still at lowered height with no change. Check your bolts.
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Old Jul 30, 2014 | 11:39 PM
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As rubber wears off the tires, their circumference and diameter are reduced. Scratch that. Never mind.
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Old Jul 31, 2014 | 01:54 AM
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I believe I've seen a few threads on this over the last couple of years. IIRC, some had a "settling" period and a readjustment of the ride height after the initial lowering.
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Old Jul 31, 2014 | 10:21 AM
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Originally Posted by Al Gumby
It's gotta be springs weakening and/or reduced gas pressure in the shocks.
But the shocks don't support the static height of the car, right?
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Old Jul 31, 2014 | 11:03 AM
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Originally Posted by John Harry
But the shocks don't support the static height of the car, right?
Pressurized shocks, dude. They can affect ride height.
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Old Jul 31, 2014 | 11:07 AM
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Originally Posted by Velocita
thanks for the replies... so are you adjusting the ride height every year or so? seems crazy, but I guess it is necessary.
No, I'm not worried about it. It's only maybe 1/4"....just enough to where my jack would no longer go under. I should buy a low-profile jack someday.
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Old Jul 31, 2014 | 11:35 AM
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Originally Posted by CelestialShow
As rubber wears off the tires, their circumference and diameter are reduced. Scratch that. Never mind.

that's exactly what it is...
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Old Jul 31, 2014 | 01:42 PM
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Originally Posted by veloz

that's exactly what it is...
Ahhh..., no it's not, I just put new tires on my car 2 months ago. My fathers car only had about 7k on it, tires were like new.
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Old Jul 31, 2014 | 01:57 PM
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Originally Posted by Eppieguy
Ahhh..., no it's not, I just put new tires on my car 2 months ago. My fathers car only had about 7k on it, tires were like new.
well then check your suspension,,,

but i can tell you my car is def lower and it is bc i need new rubber all around...no question...

also dumb question but is the new tire the same size as the old one? is it same aspect ratio?
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Old Jul 31, 2014 | 02:58 PM
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When my pfadt sport shocks wore out I could tell my ride height was lower. Air dam scraped a lot more backing out of my driveway.

Put on Bilstein Sport shocks and all was good for 6 months. Now they have settled some so I am dragging a little more but not as much as before.

Shocks can affect ride height.
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