I am now using a Race-Technology DL1 data acquisition device in my Spec Racer Ford.

The analysis software is downloadable for free at

http://www.race-technology.com/WebPage2/Products/Software/SoftwareHome.html

[Caution: after downloading RT Analysis software and opening/loading these files,

you must create a start/finish marker (see help) or you will not see the run disaggregated into laps].

Here are some sample data files -

          NHIS test day here

NHIS qualifying 1 here

LRP test day in another driver's car.  This session includes a 1.00.44 here

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Also, I brought my data analyst with me.  Here she is testing SRF 24; and zooming around the garage area -