1/4 mile speed tests

[Steve]

Stock ZZ (Bonspeed Ford), no body, no front tires, 3 good runs.

Red axle, and gear set used for all tests.

Red Motor:

3.610 @ 4.29 MPH / 3.90 AVG MPH
3.462 @ 5.17 MPH / 4.06 AVG MPH
3.515 @ 4.58 MPH / 4.00 AVG MPH

Yellow Motor:

3.727 @ 4.18 MPH / 3.77 AVG MPH
3.684 @ 4.29 MPH / 3.82 AVG MPH
3.599 @ 4.29 MPH / 3.91 AVG MPH

Orange Motor:

2.915 @ 5.83 MPH / 4.82 AVG MPH
2.914 @ 5.78 MPH / 4.83 AVG MPH
2.861 @ 5.83 MPH / 4.92 AVG MPH

Purple Motor:

2.925 / 4.81 AVG MPH
2.961 / 4.75 AVG MPH
2.975 / 4.73 AVG MPH

I did the same tests with an SE and had less traction problems off the line, I'm guessing because of weight. I used the same rear tires, but the standard ZZ broke loose more often, especially with the yellow and orange motors. I'm pretty sure that's why the red motor produced better numbers.

EDIT: I did some more testing, and I think the top speed numbers I've been getting are not very accurate. The timer resolution isn't high enough to properly guage speed across the short 1 foot trap. The highest I've ever seen it go is 6.75 MPH, which is roughly .100s. The software won't register times below that. Which means, I need to lengthen the speed trap distance, but I don't think that those numbers would mean much either as I think the cars might still be accellerating at 17, 18 or even 19' down the track. SO, I've decided just to do away with the speed trap at the end of the track. For my purposes, it's really only the ETA that matters. For future testing, top speed numbers won't be available. As for the numbers already posted, I'll leave them there, just don't take too much stock in them.