http://www.junauto.co.jp/produ...ml?en



<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JUN Auto &raquo;</TD></TR><TR><TD CLASS="quote">FOAMING URETHANE REINFORCEMENT KIT

It is said that a too hard body is not good. A reason is for a maker to perform shock absorption considered for safety.
A body will transmit various information to each part, if rigidity improves. But if body reinforcement is actually performed, wages will become a large sum for reinforcing roll bar spot increase, reliance board reinforcement, etc.
Also it is difficult to imagine what effect it induces. Then, the epoch-making body reinforcement item which can be felt at low cost was developed.
This new reinforcement method makes high rigidity feel simply, so that it reverses old common sense. The car which performed urethane body reinforcement can feel the difference, when it get in and departs, you feel a motion of a car. The car which has constructed the roll cage etc. is still more effective. Although there is a difference in the ratio of an effect also by the new car or the old vehicle, rigidity is raised certainly. </TD></TR></TABLE>

I guess it's a foam that turns into poly urethane, you apply to the chassis of your car and it stiffens it? I'm not too sure on this, can anyone make some sense out of the vague translation?

 

lol...wtf are they trying to say?

 

it looks like a two-part epoxy that you spread behind your bumper or lip for reinforcement

 

ive seen this stuff used on unibody frame rails to strengthen it. they drill a hole and inject it in various hollow sections.

also they put it in roll bars to eliminate vibration and stuff.

 

You could also take out your bushings or engine mounts, seal up one side of the mount or control arm really tight, then pour the mix in and wait for it to dry. I did that on a car that didn't have any aftermarket support. Put the control arm in a bucket of sand and pour the mix in there. Don't try to use tape, that stuff will find its way out.

I've also heard of injecting it into your pillars etc parts of the unibody, but he already said that.

 

hmm, why would you want to drill a hole to inject this stuff into it? Isn't slolid metal stiffer and stronger than hollow? I'm under the impression that driling holes into a substance would make it weaker. How would this stuff help improve anything after you inject it into the hole?

 

Solid metal is stronger then hollow metal, but as you only have hollow metal to start with, why not fill void up with lightweight material that will increase the strength?

Car makers use the thinnest materials that they can get away with to try and save weight in the finished product, and also to cut production costs. You would be surprised what is actually hollow on a car.

(I know my explaination sucks, but I can't be bothered thinking).

 

You're not understanding what he meant by drill a hole. He's not saying put huge long holes in the frame and then fill those up. He's saying that those gaps already exist, but in some spots you have to drill a small 1/4 inch hole through a thin piece of sheet metal to stick the injection needle in so you can spray in the foam. The foam hardens, but it's not very dense so it doesn't add a lot of weight. I know a lot of guys that did it to their AE86s, along with reinforcing the seam welds. Very sleeper.

 

It's called foam injection, heard from a couple of people who have done it and say that it stiffens the chassis quite a bit while while still keeping it light.

 

Oh, ok I get it now, thanks for the help everyone. I guess this process is not for the faint of heart It's for the truly hardcore

 

search for foaming the car here, there was a rather long discussion about it. it does wonders.
one of those things on the to do list for me.
makes the car a LOT more quieter as well.
Stan