C4 - Rear Suspension - Dogbones
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Intermediate
Joined: Feb 2009
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C4 - Rear Suspension - Dogbones
This may not be the proper place, but I'll take a shot anyway. The dogbones on a 96 C4, or better yet, the bracket they mount into, at what angle is the bracket to vertical?
Ok, I see your faces with a big question mark; I am working on a 57 Nomad that may have had the rear C4 suspension improperly installed in its chassis. Your help is highly appreciated.
Nick
Ok, I see your faces with a big question mark; I am working on a 57 Nomad that may have had the rear C4 suspension improperly installed in its chassis. Your help is highly appreciated.
Nick
Safety Car
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custom Tri five chassis with C4 rear
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Intermediate
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Many thanks for your speedy response.
Le Mans Master
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I would contact Doug Rippie motorsports 1-763-477-9272 and ask them I'm sure they could tell you. They manufacture special trailing arm brackets to change how the rear suspension hooks up. I always thought that the trailing arm bracket was mounted straight up and down vertical.
Drifting
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From: Mass Mass
We had a discussion, about the rear suspension, a few years ago that had some dimensions in it 
http://forums.corvetteforum.com/auto...y-so-much.html
http://forums.corvetteforum.com/auto...y-so-much.html
This post seams to come back to the top, every once in awhile.
I just want to add that I came to believe that this GM C4 drawing was not the final 1984 suspension design, but an early drawing with the “Anti’s” set at 100%.
I took a tape measure to a corvette show and crawled around under C4’s (from 84 up to 96) and could not see any difference (within ¼ in) of the pivot locations from my own car.
If this is true, than it is a good case for GM thinking the CG was around 17 inches (16.9 + 17.3) / 2 = 17.1 inches. (keeping in mind I’m scaling from an image)
With that in mind, and the data from Mike Antonick’s “Corvette Specs” book.
1984 AntiSquat 51 % AntiDive 46 %
1985 AntiSquat 51 % AntiDive 46 %
1986 AntiSquat 62 % AntiDive 46 %
1987 AntiSquat 62 % AntiDive 46 %
1988 AntiSquat 62 % AntiDive 46 %
No data from later years.
I measures my AntiSquat angle at 6.3 deg divided by the 10.1 deg (from above) gives me about 62.38 % AntiSquat, which seams right on the $$$$
The difference between 1984 - 51 % and 1988 - 62 % would only be a degree in the pivot point measurements, which are probably masked by my tape measure inaccuracies (crawling around on my stomach under strangers cars)
I just want to add that I came to believe that this GM C4 drawing was not the final 1984 suspension design, but an early drawing with the “Anti’s” set at 100%.
I took a tape measure to a corvette show and crawled around under C4’s (from 84 up to 96) and could not see any difference (within ¼ in) of the pivot locations from my own car.
If this is true, than it is a good case for GM thinking the CG was around 17 inches (16.9 + 17.3) / 2 = 17.1 inches. (keeping in mind I’m scaling from an image)
With that in mind, and the data from Mike Antonick’s “Corvette Specs” book.
1984 AntiSquat 51 % AntiDive 46 %
1985 AntiSquat 51 % AntiDive 46 %
1986 AntiSquat 62 % AntiDive 46 %
1987 AntiSquat 62 % AntiDive 46 %
1988 AntiSquat 62 % AntiDive 46 %
No data from later years.
I measures my AntiSquat angle at 6.3 deg divided by the 10.1 deg (from above) gives me about 62.38 % AntiSquat, which seams right on the $$$$
The difference between 1984 - 51 % and 1988 - 62 % would only be a degree in the pivot point measurements, which are probably masked by my tape measure inaccuracies (crawling around on my stomach under strangers cars)
Racer
Joined: Jun 2011
Posts: 315
Likes: 13
We had a discussion, about the rear suspension, a few years ago that had some dimensions in it
http://forums.corvetteforum.com/auto...y-so-much.html
http://forums.corvetteforum.com/auto...y-so-much.html
In the second figure, it appears that the bolts are at an (inside) angle of 14.48 degrees off vertical (arctan[1.55/6]).
So my guess is that the bracket is at the same angle of 14.48 degrees.
That's just my calculating from the diagrams-- have never actually measured it, so I don't know for certain if that is the correct answer.
