Originally Posted by
SixCylinders
The thing about reducing weight is you have to keep in mind what you are compromising. I'm planning to move up in wheel diameter, width, tire width and as a consequence rotational weight but I'm doing this for other reasons. My car is missing about 400-500lbs of dead weight, including cruise control which is one of those things that might help gas mileage....if it doesn't make me fall asleep and crash into a tree during a 50 mile plus drive.
The lower you go in weight the more it matters of course, going from 6000 to 5800 is laughable in a full sized truck but even 100lbs from an old VW (that weighs under 1800lbs) can be HUGE. F1 teams at some point complained to Champion I believe that the spark plug was THE densest part in their cars, as a result the spark plug design seen to the left was put into production, on the far right is a Ford Taurus plug for comparison's sake.
http://www.caranddriver.com/var/ezwe...line_image.jpg
You just have to ask yourself "how serious am I about this?".
Cruise control scares the hell out of me. The point of driving is to be in control of the car at all times. Well that is for me anyway.
I've never seen a spark plug design like that before.
__________________
if you can only race me in a straight line then whats the point 
...91 SMF SCCA
http://www.flickr.com/photos/8341770@N07/5601083432/http://www.flickr.com/photos/8341770@N07/5601083432/ by http://www.flickr.com/people/8341770@N07/, on Flickr
I see people out there spending money on the car to improve it … If you spend half that effort just working on your driving skills, making you and the car work together as a team, then you’ll go faster – period. To make the car go a second faster on the track takes a lot more energy and money than making yourself drive it one second faster.
– the late Tom Thrash SCCA Solo E Production