Stiffen the unibody with polyurethane?

donk_316 · Post by **donk_316** » Thu Apr 12, 2007 11:35 pm

Just spreading the info:

http://forums.freshalloy.com/showthread ... ost1383361

The Dark Side of Will · Fri Apr 13, 2007 5:48 am

Sweet. He really did it up. I read down to the subjective impressions so far. Does he mention what density the foam is?

Kohburn · Post by **Kohburn** » Fri Apr 13, 2007 9:37 am

handi-foam is a ~1.75lbper cubic foot closed cell foam
thats the minimum density that is considered closed cell because it is about 15% open cell.

If you do this i'd recommend getting something closer to 2.0lb or 2.4lb flotation foam used for boats, insulation and roofing

The Dark Side of Will · Fri Apr 13, 2007 10:16 am

That re-inspires my interest in doing this to one of my cars... or a whole lot of my cars. His descriptions of better feedback and controllability are especially intriguing.

Once I figure out everywhere to squirt the stuff and develop a reasonably effacacious way of measuring chassis stiffness, I have enough chasses to try 4#, 8# and 16# foam in them to see if the difference is worth the weight gain. I wouldn't mind adding 50# to the car for a 25% increase in torsional stiffness.

cactus bastard · Post by **cactus bastard** » Fri Apr 13, 2007 3:09 pm

They recommended the 8lb foam as the most effective. Denser foams are getting into rapidly diminishing returns.

The Dark Side of Will · Fri Apr 13, 2007 4:10 pm

"they" being the guy in the thread above? I haven't read the whole thing yet.

Forever-Fiero · Post by **Forever-Fiero** » Fri Apr 13, 2007 10:45 pm

I've read this on NICO and on a Supra forum! I think it's been proven time and time again. It's one of the upgrades on my list :thumbleft:

Darkmage · Post by **Darkmage** » Sat Apr 14, 2007 2:42 am

donk_316 wrote:all your bases are belong to us!

chown -R us ./bases

Unix anyone?

The Dark Side of Will · Sat Apr 14, 2007 9:55 am

Sources for the foam they used:

http://www.foampower.com/store/two_component/index.html

or at Grainger (this one is the II-12 kit, smaller capacity vs. the II-22 kit, credit goes to Epstein, he found this at Grainger)
http://www.grainger.com/Grainger/wwg...mId=1611574493

http://www.marinefoam.com/liquid-sprayin-foam.html

whipped · Post by **whipped** » Sat Apr 14, 2007 11:34 am

The Dark Side of Will wrote:Sources for the foam they used:

http://www.foampower.com/store/two_component/index.html
or at Grainger (this one is the II-12 kit, smaller capacity vs. the II-22 kit, credit goes to Epstein, he found this at Grainger)
http://www.grainger.com/Grainger/wwg...mId=1611574493

what's a "board foot" and how does it relate to volume?

dratts · Post by **dratts** » Sat Apr 14, 2007 1:04 pm

In a lumber yard it would be a one foot square board 1" thick.

whipped · Post by **whipped** » Sat Apr 14, 2007 1:25 pm

okay so their kit is ~2 cubic feet... :thumbleft:

The Dark Side of Will · Sat Apr 14, 2007 2:40 pm

S2000 use of liquid sound damper: http://www.s2ki.com/forums/index.php?showtopic=275932

Just collecting all the links from the other threads:
http://www.itwfoamseal.net/auto_aftermarket.htm
http://www.sportcompactcarweb.com/proje ... index.html

Kohburn · Post by **Kohburn** » Mon Apr 16, 2007 8:03 am

since I bought a spray foam insulation machine I am buying this stuff both .5# and 2# foams by the 55 gallon drum. sprays in at about 150* and hardens fully in about 30 seconds.

p8ntman442 · Post by **p8ntman442** » Mon Apr 16, 2007 11:36 am

Kohburn wrote:since I bought a spray foam insulation machine I am buying this stuff both .5# and 2# foams by the 55 gallon drum. sprays in at about 150* and hardens fully in about 30 seconds.

Hope you do a good job at covering all the exit holes, this stuff dosent look fun to clean off.

The Dark Side of Will · Mon Apr 16, 2007 11:40 am

Kohburn wrote:since I bought a spray foam insulation machine I am buying this stuff both .5# and 2# foams by the 55 gallon drum. sprays in at about 150* and hardens fully in about 30 seconds.

Pics in your house building thread?

Kohburn · Post by **Kohburn** » Mon Apr 16, 2007 12:55 pm

The Dark Side of Will wrote:
Kohburn wrote:since I bought a spray foam insulation machine I am buying this stuff both .5# and 2# foams by the 55 gallon drum. sprays in at about 150* and hardens fully in about 30 seconds.
Pics in your house building thread?

not yet - probably in the next few weeks. leaving for vacation friday.

Unsafe At Any Speed · Post by **Unsafe At Any Speed** » Mon Apr 16, 2007 4:23 pm

This would be good for those going targa correct?

The Dark Side of Will · Mon Apr 16, 2007 4:34 pm

Probably not enough for that.

Unsafe At Any Speed · Post by **Unsafe At Any Speed** » Mon Apr 16, 2007 4:46 pm

I mean in addition to bracing underneath the car. At this point, I'm pretty sure I want to go with a targa top on my car so I'm looking into anything to add the extra needed stiffness to the frame.