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F45 lowering

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Old Jul 29, 2023 | 01:03 PM
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Default F45 lowering

I hope this is a simple question.

Does lowering a F45 mess things up computer wise or it just lowers like a standard suspension.

I just want to take about an inch out of the rear nothing radical. Just want to make sure the computer will not set a code.
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Old Jul 29, 2023 | 01:34 PM
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You can do that. My F45 coupe is lowered tpretty much all the way on stock bolts. Did it maybe 12-13 years ago. Wheels are 18/19 BTW.




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Old Jul 30, 2023 | 12:37 PM
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I'm the original owner of my F45 equipped C-5, and I lowered it about an inch, a couple of months after I bought it. That was 30,000 miles ago, and so far, I haven't experienced any issues.
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Old Jul 30, 2023 | 01:38 PM
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I don't think you would have an issue, if anything, the computer would compensate for the difference. On a side note, I would consider changing out the F45 in favor of some C6 Z06 shocks - low cost upgrade that will yield some big improvements.
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Old Jul 30, 2023 | 02:05 PM
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Originally Posted by Vader_C5
I don't think you would have an issue, if anything, the computer would compensate for the difference. On a side note, I would consider changing out the F45 in favor of some C6 Z06 shocks - low cost upgrade that will yield some big improvements.
My system is working perfect and no leaks to I will ride it till there are issues.
Then I will put the simulators on and better shocks.

At some point I plan to change the bars just not sure what one I want yet. I can get neatly any of them for cost so it is a matter of what one. Nothing radical as I have learned in suspensions many times less is more. Right size the bars and good shocks can so wonders over too large bars and too stiff shocks. The GM performance division adopted this and released some of the best handling GM cars ever.n

The car is a convertible and not really planning to do anything competitive. My other car is for that. The C5 for me is to put the top down and drive.

I do get tempted to do heads and cam for a better sound when I hear a good LS cam. I miss my SS Chevelle.
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Old Jul 30, 2023 | 04:49 PM
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Originally Posted by hyperv6
My system is working perfect and no leaks to I will ride it till there are issues.
Then I will put the simulators on and better shocks.
Same here....................and I had a Chevelle SS, too. A '71.
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Old Jul 30, 2023 | 05:36 PM
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Originally Posted by leadfoot4
Same here....................and I had a Chevelle SS, too. A '71.




Had a 68 and later put a tunnel ram.

the big block was long gone. I did have a BBC in my GMZ Sprint SP.
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Old Jul 31, 2023 | 08:14 AM
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OP, on a serious note, here's something to consider. The "adjusting bolts", on the front spring, are threaded into metal inserts, something like the hardware item known as "nutserts". These inserts are bonded to the spring using some sort of adhesive. A C-5 Corvette is now considered an "older car", and the METAL adjusting bolts have been in place, in the METAL threaded inserts, for a LONG time, and most likely, a certain amount of corrosion has occurred. Therefore, you need to be careful not to break the inserts loose from the spring, when attempting to turn them.

In the rear, it's not as big a deal, because the ride height is set using large diameter, standard nuts and bolts. If you mess one up, it's not as catastrophic.
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Old Jul 31, 2023 | 08:46 AM
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Originally Posted by leadfoot4
OP, on a serious note, here's something to consider. The "adjusting bolts", on the front spring, are threaded into metal inserts, something like the hardware item known as "nutserts". These inserts are bonded to the spring using some sort of adhesive. A C-5 Corvette is now considered an "older car", and the METAL adjusting bolts have been in place, in the METAL threaded inserts, for a LONG time, and most likely, a certain amount of corrosion has occurred. Therefore, you need to be careful not to break the inserts loose from the spring, when attempting to turn them.

In the rear, it's not as big a deal, because the ride height is set using large diameter, standard nuts and bolts. If you mess one up, it's not as catastrophic.
Thanks for the heads up. I only plan to adjust the rear a small bit.

I love the low look but I already scrap now and really don’t want to do more damage.

Due to the weather our curbs and drives have a bi5 more incline. Also the stupid cities are now installing speed tables.

If I were to go lower here I would really need to bag it to do it right.

I went to the 285/40/18 tires to fill the wheel wells and not lose much ground clearance.

Now if I kept the car in San Diego where I have family it would be slammed.
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Old Jul 31, 2023 | 11:39 AM
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I don't have any trouble with mine on roads in general, and my driveway is flush with the road surface. Very occasional "brushing" noise from the front spoiler, but nothing else. I live in WV and also drive a lot in MD and VA, none of which would win a "best roads" competition.
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Old Jul 31, 2023 | 01:05 PM
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Originally Posted by jackthelad
I don't have any trouble with mine on roads in general, and my driveway is flush with the road surface. Very occasional "brushing" noise from the front spoiler, but nothing else. I live in WV and also drive a lot in MD and VA, none of which would win a "best roads" competition.
I was going through a parking lot the other day and drug the front end in a dip in the parking lot.

Friends at their houses often have boards at the end of the drive to get their cars in and out. I am good at home but once out you just have to pay attention.

With snow and ice the curbs can be higher.

Now we have speed tables that if you have not seen one are like large long speed bumps. The truck guys love ‘em because they can get air.

Got family in WV and accept for driveways things are good there not many curbs outside Charleston..

Some of my favorite roads are down there.
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