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Offline 73 CORV

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lowering kit
« on: November 24, 2015, 11:20:03 AM »
:Can anyone advise me where I might be able to pick up a lowering kit eg;lowering bolts for a 73 coupe in Australia. Cheers
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Offline Vettech

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Re: lowering kit
« Reply #1 on: November 24, 2015, 12:58:05 PM »
You might try Ian at ChevParts Yenora, or Pontiworld down Albion Park way. I know I bought bolts from Chevparts many moons ago, but these were normal length, which still have some adjustment. Plus new rubbers/bushes etc.
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Offline 73 CORV

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Re: lowering kit
« Reply #2 on: November 24, 2015, 03:41:32 PM »
Thanks champ I'll give them a try tomorrow.
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Offline bfit

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Re: lowering kit
« Reply #3 on: November 24, 2015, 03:44:19 PM »
standard bolts are 8" long.
you can buy  grade 8 bolts at any good industrial bolt suppliers.
Make sure you ask for grade 8 do not accept grade 5.
you will need UNF thread and nilox nuts ( I like grip nuts they are more reliable and you can buy them hardened. )
 
  grade 8 will have six makes on the head of the bolt

https://www.boltdepot.com/fastener-information/materials-and-grades/bolt-grade-chart.aspx
 this will help
how far do you want to lower the car.
Bfit
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Offline Vettech

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Re: lowering kit
« Reply #4 on: November 24, 2015, 04:40:04 PM »
Oh, the reason I changed the bolts was that whilst doing something else I noticed the "originals " were rusted and bably collared, plus the rubbers had turned into concrete, I would imagine its a good idea to replace these at reasonable intervals. And yes Bob is correct they must have the five marks for grade 8.
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Offline 73 CORV

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Re: lowering kit
« Reply #5 on: November 24, 2015, 06:13:23 PM »
Thanks guys, need to drop it another  1" at least, at the moment I have 8" bolts.
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Offline bfit

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Re: lowering kit
« Reply #6 on: November 24, 2015, 07:05:29 PM »
Have you got castellated nuts  on the bolts at the moment
What the measurement from ground to chassis just in front of the rear wheels
Bfit
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Offline 73 CORV

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Re: lowering kit
« Reply #7 on: November 24, 2015, 07:26:43 PM »
150 off the ground I have nylon nuts
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Offline bfit

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Re: lowering kit
« Reply #8 on: November 24, 2015, 07:32:04 PM »
The nuts must be close To being as far down the bolt as possible,
The standard measurement would be 7 and 5/8"  ( about 194 mm ) to 8" ( 200mm)
Which means the car is already lowered around 1.5"
Bfit

Check these pages.
http://tech.corvettecentral.com/2011/04/c2-c3-corvette-ride-height-guide/

This shows where to measure chassis

http://www.c3vr.com/member_pages/4401_4500/4427/specs.jpg
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I have seen too many instances where people continue to pursue wrong courses of action because they do not take the time to think critically about what has happened in the past.’’
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Offline 73 CORV

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Re: lowering kit
« Reply #9 on: November 24, 2015, 07:37:55 PM »
The nuts are all the way down as far as they can possibly go. I'm trying to load a photo of the car but haven't been able to.
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Offline 73 CORV

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Re: lowering kit
« Reply #10 on: November 24, 2015, 07:54:49 PM »
Cheers for the links mate I'll have to check my wheel sizes to.
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Offline 73 CORV

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Re: lowering kit
« Reply #11 on: November 28, 2015, 08:33:47 PM »
installed 5/8 bolts 9'' long that was the longest bolts I could get it was enough for what I wanted Great result Tried to post pictures but wasen't able to
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