Subframes?
Thread Starter
Pro
Joined: Oct 2001
Posts: 643
Likes: 2
From: Boulder Colorado
St. Jude Donor '06
Subframes?
I know with the TTA (and most cars) you can bolt on or weld on subframe connectors to stiffen it and eliminate most of the torque twisting.
We all know when you take the Targa top off, the car bounces around like the cast of Baywatch.
I've done searches and come up empty. Is there a similar solution for the C-4s??
We all know when you take the Targa top off, the car bounces around like the cast of Baywatch.
I've done searches and come up empty. Is there a similar solution for the C-4s??
Drifting
Joined: Aug 2003
Posts: 1,565
Likes: 2
From: somewhere between heaven and hell WI
If you have a 86 or later you can use the stock convertable X frame on a coupe. If you gots a 84-85, it can be used but brackets need to be made for the front to mount it.
R&D Racing made a X-frame for the C4 but apparently they are not making them right now.
I got a Cross frame from R&D Racing on my 84 and it made a huge diffrence in the rigidity in the car. With the top off or on the car is much more stable.
R&D Racing made a X-frame for the C4 but apparently they are not making them right now.
I got a Cross frame from R&D Racing on my 84 and it made a huge diffrence in the rigidity in the car. With the top off or on the car is much more stable.
Thread Starter
Pro
Joined: Oct 2001
Posts: 643
Likes: 2
From: Boulder Colorado
St. Jude Donor '06
Thanks for the reply.
Besides the rare and NLA kits, has anyone here done anything about it recently? If so what?
Can't possibly imagine I'm the only one thinkin about it. Especially with the big cube guys here
Besides the rare and NLA kits, has anyone here done anything about it recently? If so what?
Can't possibly imagine I'm the only one thinkin about it. Especially with the big cube guys here
Instructor
Joined: Dec 2002
Posts: 196
Likes: 1
From: Elk Grove CA
Funny I was going to post this subject yesterday. I know the C4 has a full frame but still twist especially w/o the top. I know someone posted an x-brace off of a vert. If we can see a picture of it we should be able to copy it. I have been looking at mine and there are provision at the front where you can bolt on the x-brace but I didn't see any at the back. Picture would really help. If anyone has a picture of an undercarriage of a vert please post.
Drifting
Joined: Aug 2003
Posts: 1,565
Likes: 2
From: somewhere between heaven and hell WI
Funny I was going to post this subject yesterday. I know the C4 has a full frame but still twist especially w/o the top. I know someone posted an x-brace off of a vert. If we can see a picture of it we should be able to copy it. I have been looking at mine and there are provision at the front where you can bolt on the x-brace but I didn't see any at the back. Picture would really help. If anyone has a picture of an undercarriage of a vert please post.
Then you would have to lift the rear up into place and after removing the seats and carpet, drill holes into the floor. The stock install uses a plate with 2 threaded studs off it that goes from the inside through the holes you drilled and through the x frame. Then nuts go over the threaded studs.
I have all the hardware from a factory x frame and if you really need, I can take pics and post them.
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Drifting
Joined: Aug 2003
Posts: 1,565
Likes: 2
From: somewhere between heaven and hell WI
I do like the R&D piece, but I had a friend looking last year and not able to locate R&D, like they folded or sold.
Drifting
Joined: Aug 2003
Posts: 1,565
Likes: 2
From: somewhere between heaven and hell WI
The top brace is something that bolts in place of the targa top.
its made of square tube.
You take the targa top off, and this is made to bolt in the stock mounts for the targa top.
Would be good to bolt in for racing.
They also make a camber brace that bolts to the upper A-arm mounts and goes in front of the engine.
I also put that on my 84 and it really stiffened up the front end.
its made of square tube.
You take the targa top off, and this is made to bolt in the stock mounts for the targa top.
Would be good to bolt in for racing.
They also make a camber brace that bolts to the upper A-arm mounts and goes in front of the engine.
I also put that on my 84 and it really stiffened up the front end.
Drifting
Joined: Aug 2003
Posts: 1,565
Likes: 2
From: somewhere between heaven and hell WI
I know with the TTA (and most cars) you can bolt on or weld on subframe connectors to stiffen it and eliminate most of the torque twisting.
We all know when you take the Targa top off, the car bounces around like the cast of Baywatch.
I've done searches and come up empty. Is there a similar solution for the C-4s??
We all know when you take the Targa top off, the car bounces around like the cast of Baywatch.
I've done searches and come up empty. Is there a similar solution for the C-4s??
Melting Slicks
Joined: Dec 2002
Posts: 2,070
Likes: 12
From: NY
Race Director
Joined: May 2000
Posts: 17,101
Likes: 4
From: No more yankee my wankee, the Donger is tired!
To properly tie the frames together is going to require more than just bolt in bars. You are going to need to custom fab some mounts going fore and aft and laterally.
Pro
Joined: Mar 2006
Posts: 663
Likes: 1
I bought from them a couple of monts go.
this has their phone number:
http://forums.corvetteforum.com/show....php?t=1663775
Thread Starter
Pro
Joined: Oct 2001
Posts: 643
Likes: 2
From: Boulder Colorado
St. Jude Donor '06
Unless I fab something, it's sounding like there's really no true setup to stiffen?
How well, if at all, do the crossbars work (that bolt up just behind the seats)?
Obviously we have a need
How well, if at all, do the crossbars work (that bolt up just behind the seats)?
Obviously we have a need
Melting Slicks
Joined: Dec 2002
Posts: 2,070
Likes: 12
From: NY
The DRM rear chassis bar and the stock or RD X frame is a great setup. I also use the RD front camber bar that most say works, although I didnt do testing myself. Rear cross bars are for harness belts only without chassis stiffining. DRM rear chassis bar takes care of the belts too.
