Duncan said:How much of a weight loss would you get from changing some of the glass to perspex and is it road legal??
Having the wind screen replaced by acrylic glass of any kind is not legal and I would for safety reason not advise to do so. BTW the MSA regulations do not permit it either.
Changing all other windows is possible, but realistically you need to have the same strength as glass because you will run into a number of problems unless you are not bothered about looks.
Also to consider is the fact that you need to from the windows and the ones that wind up and down need a special treatment to be fairly scratch proof. This is quite costly.
It should not be underestimated how mauch the windows add to the structural stiffnes of the chassis, which has to be catered for.
My advise is to look for other areas to loose weight (if not for racing) especially considering that although acrylic glass is considerably lighter it is not enough glass to be replaced to qualify as a major saving.