You are posting a lot of questions in a place that may or may not have the answers. You will most likely get much more technical data and better research at
www.corner-carvers.com. It will take a couple of days to register and read the wiki very carefully. If you start a thread that is something you could have used the search button on they will most likely terminate your memebership. This forum is very technical and they are like sharks...they smell a drop of blood in a million gallons of water. The upside of the site is the fact that there are lots of engineers, techs, mechanics, designers, etc on this site that can work through a probelm and provide technical data to support their reasoning. Another perk is that Jack Hildey from Maximum Motorsports frequents this site pretty regularily. I pretty much just lurk around over there and do a lot of research. Another place that actually has a road racing forum is
The Corral - Home and Jack Hidley frequents this site as well.
Darren