Advice request: Serious hail repair soon. Do I sell it after?

The deal. My Mazda3 manual hatch was viciously attacked by covert fat ninja hail stones at the airport parking lot last summer. Part of the repair will be a new roof! So, that requires the mounting rails removed and the center section cut out and a new one welded in. In addition to that, it's getting new headlights,… » 1/23/15 6:15pm Friday 6:15pm

Opposite props. Why pursue a contra-rotating science of cool?

Yeah, some things just look way too cool not to have. Such as these bad boys, the contra-rotating props. Using a planetary gear box that's way more complex than a regular gear reduction, one turns the opposite direction of the other. What are the real reasons to consider such a thing? There are several things we… » 1/15/15 3:57pm 1/15/15 3:57pm

The only problem with this idea is the actual audio capability of the car stereo, not so much the ability to produce the sound, but the ability to produce the sound in enough volume....and i dont mean turning up the volume. Can the speakers move the necessary amount of air to produce the effect car-wide. I'm sure a… » 1/14/15 10:38am 1/14/15 10:38am

Nice. something of possible interest, Toyota does not sell a pushrod-V8 at all in their cars....and yet they race with one. So, the built an engine just so they could go racing and market their products. » 1/10/15 10:06pm 1/10/15 10:06pm