Foaming the chassis, good or bad?

[gmookher]

how will this benefit my brz chassis on the tarmac? will it help my times?(yes, devils advocate mixed with genuine curiousity)

[Silverpike]

It's a chassis reinforcement strategy. It benefits you the same way a roll cage or other load point reinforcement bars would. I've never been in a car that was foamed, so I can't say how good it is compared to the more traditional methods. All things being equal, the traditional cages would probably achieve the best results.

[solma]

Originally Posted by gmookher

how will this benefit my brz chassis on the tarmac? will it help my times?(yes, devils advocate mixed with genuine curiousity)

I thinks the real question here is how much(in %) will it stiffen the chassis vs weight penality. After that everybody can decide if they need or not a stiffer chassis.

And I agree with silverpike, roll cage would be way better for stiffening the chassis but again unless you are going for a full race car its not a solution unless you want to crack your skull in a road accident(no helmet).

[SOneThreeCoupe]

Don't do it unless you're completely sure, because if you do it right, it's damn near irreversible. It sticks to EVERYTHING and is tenacious as all hell.

I did it to my 240SX; I don't care if it never comes out- I live in SoCal (no rust worries) and the car's being built (slowly) into a dedicated track rat. It made a significant difference in the car's stiffness, but the car also started out much less rigid than a ZN/ZC6.

As far as weight goes, the foam I used weighed relatively little- about ten pounds did my lower radiator support, both frame rails, my seat cross bars, my B pillars, my A pillars and my C pillars. I did this a while back and didn't quite think it all through perfectly, so I may have wasted some pounds.

It makes far more sense to just install a well-built and properly designed cage, because it will not only stiffen the chassis but provide safety in case of off-track excursion.