What do you have for chassis stiffening? Options

[Justinp71]

I put some more horsepower in my car, so far I have just autocrossed it on street tires. I have the bolt in roll bar that has the mid bar going to the floor.

Besides that my chassis is stock and I am wondering what I should do for more re-enforcement... so I can comfortably run on slicks.

Below is a photo of the roll bar. I don't consider the roll bar to give to much chassis stiffening, but it just might help with cracking the longs.

Edit: I mainly just use the car for street and the occasional Autocross or DE

[J P Stein]

It doesn't take an engineering degree to see where the points of load are on a 914......hint....there are 4 and round black things right near em'.
Once that tough bit is over, then you gotta figure out where you can attach structure & how to bridge between them.

As Brit wrote, a butt dyno reveals a huge difference. The chassis moves more like a single unit and the suspension does it's work in a more controlled manner.
This causes the car do the same thing every time when loaded....or close enuff. (IMG:style_emoticons/default/biggrin.gif)

BTW, there is closer to 60 lbs than 20 lbs extra. Bridges aren't light.