lowering bolt size
Drifting
Joined: Jul 2006
Posts: 1,483
Likes: 3
From: Newark, New Jersey
buy them online . I just went through this and tried to take the cheaper way out and buy them at a hardware store. Turned out to be a hassle. So for $19.99 and 6.99 shipping from Ecklers, they arrived in 3 days and did the job. The 10 inch bolts allowed me to lower the rear about 1.5 inches, but better yet, allowed me to even out the right and left sides of the rear.
Safety Car
Joined: Dec 2006
Posts: 4,290
Likes: 6
From: St Marys GA
If it were me, I'd get 11" or even 12" bolts. I have the kit from Mid America with 10" bolts, and one side is all the way at the bottom. It's pretty much at the height I want, but it CAN'T go any lower, and 1/2" or so might look good.
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Drifting
Joined: Jul 2006
Posts: 1,483
Likes: 3
From: Newark, New Jersey
Go with 11 or 12 inch bolts if you can.
Drifting
Joined: Aug 2011
Posts: 1,861
Likes: 1
From: panama panama
I just went to hardware store looking for this 9/16 x 11 bolt. to lower my rear suspension. (1986 vette) the person dont know what I was talking about.
then he correct me and say I need 1/2 and 11" long.
then he show me the bold sample, that look just about the same sizes of what I was looking for, but 8" long. then he told me. that they dont carry that bolt on 11" long. but he give the name of another store that carry those bolt.
so before I go to that store. need to clarify.
Is 1/2 bolt dont sound to me as 9/16 bolt. maybe he is using other metric system.
can someone help me here
then he correct me and say I need 1/2 and 11" long.
then he show me the bold sample, that look just about the same sizes of what I was looking for, but 8" long. then he told me. that they dont carry that bolt on 11" long. but he give the name of another store that carry those bolt.
so before I go to that store. need to clarify.
Is 1/2 bolt dont sound to me as 9/16 bolt. maybe he is using other metric system.
can someone help me here
Pro
Joined: Jul 2006
Posts: 635
Likes: 1
I just got grade 8 hardened threaded rod[I found the hardened rod at a specialty bolt supplier in town] , it's been a long time ago now I thought it was 1/2" 13 thread sized rod just get as close to stock metric size as you can. I bought new poly spring bolt cushions and the steel mount pockets used for the vette spring bolt [ vette brakes & products]and drilled center hole out to the rod dia. size, It was so close to the stock metric size I really didn't remove hardly anything. I cut them to 12" length and that length worked out great for me, threaded rod allows you to adjust it easily by just turning the nut in if you want the car higher. I welded a nut on the top of rod and painted the nut and used nyloc locking nuts and very thick washers on bottom. I had bought new factory bolts but they didn't have enough bolt length to adjust how uneven the car sat. I didn't want to wait till new bolts got shipped so I tried this and it worked out great for me,you should try it. I've driven it for years like this with no problems. Good luck
Last edited by turbotim23; Oct 20, 2011 at 06:41 PM.
Team Owner
Joined: Aug 2005
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From: Riverside County Southern California
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Melting Slicks
Joined: May 2010
Posts: 2,082
Likes: 3
From: Conowingo Maryland
I keep reading this and reading this. Something does not sound right a 9/16 bolt is hudge and does not seem right. If it were not so late I would run out and take a look but my quess is you need an 3/8 by 11 bolt or at most 7/16 by 11. I may be wrong but 9/16 seems way to large. You may want to dubble check before you buy.
Instructor
Joined: Feb 2011
Posts: 244
Likes: 6
From: harrison twp mi
I keep reading this and reading this. Something does not sound right a 9/16 bolt is hudge and does not seem right. If it were not so late I would run out and take a look but my quess is you need an 3/8 by 11 bolt or at most 7/16 by 11. I may be wrong but 9/16 seems way to large. You may want to dubble check before you buy.
14mm=.5511"
it will fit ,just lowered mine recently.
Team Owner
Joined: Jan 2003
Posts: 20,290
Likes: 239
From: Summerland B.C. Canada
I found it hard to find large bolts locally, but threaded rod was available locally.
I picked up this threaded rod from Acklands, but I'm sure you can find the same elsewhere. I welded a nut on the end and made them 11".
Profast'ners
ROD THREADED ALLOY PLT NC 9/16X36
Alloy national coarse threaded rod. Yellow dichromate finish with 180,000 to 200,000 PSI tensile strength. For high strength applications. Size 9/16 inch x 36 inch in length.
Select to Compare
More Info 891 $13.19
Quantity: EA
I picked up this threaded rod from Acklands, but I'm sure you can find the same elsewhere. I welded a nut on the end and made them 11".
Profast'ners
ROD THREADED ALLOY PLT NC 9/16X36
Alloy national coarse threaded rod. Yellow dichromate finish with 180,000 to 200,000 PSI tensile strength. For high strength applications. Size 9/16 inch x 36 inch in length.
Select to Compare
More Info 891 $13.19
Quantity: EA
Burning Brakes
Joined: Jun 2005
Posts: 1,188
Likes: 13
From: Wallingford Vermont
Yup 9/16" alittle bigger than stock but fit better IMHO.
see... http://forums.corvetteforum.com/c4-t...r-my-86-a.html
