American Sportworks Carbide
 

Ok guys, here are the numbers on the Carbide:

Standing start: 42:55
Rolling Start: 39.63

What I find interesting is that it picked up nearly three seconds on the rolling start where the helix only picked up about a second and a half or so. I attribute that to the Helix being able to get up to speed quicker on the standing start.

hmph

track
 

Where is your track at and how long is it

I think it is about 1/3 mile. I'll have to measure. I am 50 miles north of Charlotte, NC.