targa off = wobbly car????

Facime

Facime

Leather work expert
Jun 1, 2006
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Corvallis OR
futeki_supra said:
I can make that same thing for like 100$ or less
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not jumping down your throat here, but if you can get the materials, bend the bars, cut out the plates, match the plates to the roofline, and weld it all up without it pulling out of shape, then powdercoat it for less than $100...?

...I'll take 20! :naughty:


Sure, you may be able to make something resembling a targa brace that may in fact cure your wobble but Im guessing it wont be pretty.


I'll be the first to admit that my brace is not for everyone. Some people hate it, some people love it, but what it DOES do 100% is fix the problem and allow your top to be off. Changing out for new shocks, bushings, ball joints, and the like to cure the problem is all well and good as well, but it will cost a ton more and may NOT in fact fix it. There are only 2 real cures for the problem...





...leave the top on or buy a hardtop. :biglaugh:
 
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Gilsdorf

Gilsdorf

Street Dragon
Jun 18, 2005
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There were several discussions about using the 3m automotive chassis foam to help stiffen the frame, I'm wondering if it could also be used inside the A-pillars, inside the rear roof and C-pillars to help reduce or eliminate the wobble. I know that Sport Compact Car mag really like the stuff in their 300z project car several years ago, though I think they only used it in the frame.

I am planning on foaming the frame sometime in the far far future (when I completely strip the car for body work and paint), but was wondering if I would benefit from using it in the roof and pillars.

Matt
 
M

madseacow

New Member
Apr 2, 2005
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Gilsdorf said:
There were several discussions about using the 3m automotive chassis foam to help stiffen the frame, I'm wondering if it could also be used inside the A-pillars, inside the rear roof and C-pillars to help reduce or eliminate the wobble. I know that Sport Compact Car mag really like the stuff in their 300z project car several years ago, though I think they only used it in the frame.
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I remember hearing something about that, but I can't find it. I wonder what that will add in weight?
 
suprajjang

suprajjang

Supra Enthusiast
Mar 30, 2005
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Turbo. Targa. Life. said:
So who sells floor bars?
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well i just sent dusty at mvp a email about the do luck bar since they are a do luck authorized dealer and none of the other vendors had them on their website so i will let you know
 
Larry_A

Larry_A

You don't matter
Apr 7, 2005
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SoCAL
HellsLegion said:
If your Pre-89 your car will wobble with the targa off. in 89 the cars started to come with more reinforcement to prevent the car from flexing with the targa off.
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Jeff Lange said:
Do you just make crap up or what? Haha.
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HellsLegion said:
^Wasnt me. It was yellow 13
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Although the mis-information was garnered from a now-recognized uninformed source, you re-disseminated the mis-information as if it were your own. Next time, I recommend you include your source to preclude any unwanted embarrassment. If not, as you can see, reprisals are guaranteed.
 
tekdeus

tekdeus

Pronounced Tek-DAY-us
Jan 23, 2006
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I will be using some extremely hard chassis foam within the next couple of months, as my car is stripped down for a build right now. My goal is to have ZERO chassis wobble without using a targa brace. My 87 with front & rear strut bars, and a floor bar was much tighter, but stil not free of the shimmy. I will post pics and feeback!
 
Larry_A

Larry_A

You don't matter
Apr 7, 2005
102
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SoCAL
tekdeus said:
I will be using some extremely hard chassis foam within the next couple of months, as my car is stripped down for a build right now. My goal is to have ZERO chassis wobble without using a targa brace. My 87 with front & rear strut bars, and a floor bar was much tighter, but stil not free of the shimmy. I will post pics and feeback!
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Close your eyes & picture your car with the doors & targa removed. Essentially, as far as load-bearing structure goes, the floor is all that holds the front of the car to the rear. Now, envision all the places where you'll be able to add the foam. Do you honestly believe that the foam-trick will reward you with ZERO wobble when you're done? Dunno man, sounds like wishful thinking.
 
tekdeus

tekdeus

Pronounced Tek-DAY-us
Jan 23, 2006
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www.bitrontech.com
I'm looking into foam from this company: http://www.shopmaninc.com/foam.html
You can get densities as high a 8 or 16lb's per cubic foot. Their description for the 16lb foam is "This 16LB density foam is essentially as hard as a rock, you would need a hammer in order to make any dents in this product."

Filling the rocker panels would be almost like having solid aliminum or hardwood frame rails :) It's a gamble, but worth a shot.
 
shaeff

shaeff

Kurt is FTMFW x2!!!!
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Mar 30, 2005
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mkiiitech/dr. jonez said:
http://www.mkiiitech.com/forums/viewtopic.php?t=130

This was discussed abit in another thread. I want to share the info I've found out about it. Also put up some link to the stuff.

Now in the below article originally posted by ma71supraturbo, they increased the Z's chassis rigidity by 40% using the 2lb mix. Shawn dude (in the old thread) said that filling the tunnel between the rear strut towers was an amazing difference. I believe he was using the 2lb mix also. Now check out the following link, http://www.shopmaninc.com/foam.html . Compare the physical properties of the 2lb foam to say, the 8lb foam or even the 16lb pound foam. The 16lb foam is 1500% stronger than the 2lb mix. You are ramping up from a 50psi flexural strength to a 750psi flexural strength. Can you imagine the chassis filled with that?

Some important notes that have been left out of the other thread and in the below article. DO NOT try and contain this stuff. You need to have relief holes every couple inches for this stuff. Just tape off the surrounding area so it is easy to clean up. It turn out the boat folks deal with this stuff all the time. I've been lurking their forums finding out about this stuff. What happens when you don't have relief holes? The foam WILL bend/bust/break whatever you are pouring it in. The best story I read applies directly to us. On of the boat guys pour this stuff into his car's chassis to strengthen it. He did not have relief holes. The chassis was twisted and busted beyond repair!

Fortunately pretty much all the places we can pour this in to strengthen our chassis have holes already, so we're relatively safe. However if you were thinking of welding those holes over, think again.

Here are some links to buying foam that I have found.

3M's application

http://www.shopmaninc.com/foam.html

http://www.betterfoam.com/one/1ComponentStraw1.html
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