What can you do to prevent the rear quarter panel wrinkle? Fast hard launching cars.

[Nasty Wendy]

Isn't that kink about were that extra set of gnx body mounts go?

So would GNX body mounts help remedy this?

 

[Paul Lohr]

I think the GNX body mounts are a good idea.

Some type of cross bracing to stiffen up the center section of the frame might help. Ideal would probably be an "x" shape from the front frame section to the rear frame section. That is probably not reasonable for weight, convenience, or ground clearance.

Perhaps the most workable solution is the one linked below. Have a look at those braces that run from front to rear in the center section of the frame. I would add one or two pieces that tie those two center braces together from side to side.

#18

Also make sure the other known weak spots in the frame are strengthened. Crossmember above the rear end. Rear control arm mounting points.

Comments, corrections, suggestions are welcome.

Paul Lohr

 

[turbojoe1]

Prasad's frame is a work of art!!!

 

[VaderGN]

Prasad's frame is a work of art!!!

Where's Prasad's frame? I can't find it.


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[Nasty Wendy]

Where's Prasad's frame? I can't find it.

Click the #18 in Paul Lohr's post.

Awesome suggestion guys. I will put as many of them in play as I can.

 

[Eticket]

I'm pretty sure most cars that are bending fenders have frame notches.... That is the cause, not necessarily launching too hard.
I'm not dogging the frame work....this is typical.

 

[HighMileage]

How about the GNX suspension setup? Maybe that would transfer some of the energy to the center of the car?

 

[WIKEDV6]

Here are some close up shots!

 

[Nasty Wendy]

Man that is nice looking work. Shiny and everything. Looks 500% stronger.

 

[QwikStop]

Awesome

 

[WIKEDV6]

Man that is nice looking work. Shiny and everything. Looks 500% stronger.

Thanks! I know it's an over kill and maybe unnecessary in some areas but I didn't want any regrets. I didn't want to cut the body and weld in a roll bar on the frame just incase if I put the car on the lid so I also welded brackets to the frame which will hug the floor pan so that I can bolt the roll bar. This way, it will be connected directly to the frame through the body instead of just to 16 gauge sheet metal floor pan.

Prasad

 

[we4Mateo]

Thanks! I know it's an over kill and maybe unnecessary in some areas but I didn't want any regrets. I didn't want to cut the body and weld in a roll bar on the frame just incase if I put the car on the lid so I also welded brackets to the frame which will hug the floor pan so that I can bolt the roll bar. This way, it will be connected directly to the frame through the body instead of just to 16 gauge sheet metal floor pan.

Prasad

Nice stuff!

 

[HighMileage]

Isn't that kink about were that extra set of gnx body mounts go?

Below is a pic of the "GNX" bushing,and where it is supposed to go. I installed all new bushings (sometimes called cushions) a few years ago. The pic is with the body raised about 3 inches off of the frame. The bushing sits in there. No bolts.

The pic is taken of the drivers side location,just ahead of the hump in the frame. The smaller part of the bushing sits in that hole. My guess is that it just might help.

 

[dvernst]

Here's a video from an old school member...filmed by an old school member Pacemkr. You can see it buckle when disco takes off.

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Damn!

 

[turbogray]

Body bushings, HR parts ARB, rear seat braces and welding a 2" bar right across the top of the upper control arms connecting the frame should prevent this from happening.

 

[SFI Cutlass]

Title should read : Fast Hard Launching Street Cars.

You know the spot. You can tell it when you see it. Nope that didn't happen from a shopping cart at Walmart. This car leaves HARD. How can you prevent that wrinkle? Its a shame to have a really nice car that performs well but is marred by that quarter wrinkle. Is there some sort of bracing that can be put in place to prevent it? You don't see it on caged cars so I have to believe that the bracing provided by a cage prevents it but what about on street cars that see some track duty? What about a car that you don't want to cage? What can be done to stop the wrinkle? Botox?

Wish I would of seen this posting earlier. I have the perfect solution for you, coming from a guy that used to love low riders and added an extra 1000 pounds to a g body with 12 diesel batteries and 2 pumps. Yeah I know what you guys might be thinking but hey that was my early 20's. Lots of people in that scene had the same problem with the quarters buckling like you are referring and the way we strengthen the quarters from all the weight and the bouncing down the street was by fiberglassing the quarter panels with kitty hair fiberglass. We used to put some long gloves on and pack the glass over the crucial areas and smear it on the entire panels from the inside and let dry. This is an old friends regal that also had the quarters panels fiberglassed to prevent the creases from appearing.

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[KevinB]

My silver car does it with a 6pt bar, no frame notch, has poly bushings and gnx bushing. Also has solid joints in rear. It did it when it did 1.4 60's and still at 1. 3's. Haven't added any bracing back there yet. That is the future plan though.

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[Chuck Leeper]

" I also welded brackets to the frame which will hug the floor pan so that I can bolt the roll bar. This way, it will be connected directly to the frame through the body instead of just to 16 gauge sheet metal floor pan."

If the intent is to be track "legal" the rules clearly state that if the car has a frame, the bars must be welded to it & not bolted or welded on the floor pan.

 

[WIKEDV6]

" I also welded brackets to the frame which will hug the floor pan so that I can bolt the roll bar. This way, it will be connected directly to the frame through the body instead of just to 16 gauge sheet metal floor pan."

If the intent is to be track "legal" the rules clearly state that if the car has a frame, the bars must be welded to it & not bolted or welded on the floor pan.

Chuck, by no means I am a racer or a track guy. I just want to increase my chances of survival if I put the car on the lid on the street!
Prasad

 

[coach]

Prasad,
You did a wonderful job on that frame. I'll be doing one late winter or next spring.


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