I came across this looking for engine sensor
monitoring devices.
(http://www.charm.net/~mchaney/homedyno/homedyno.htm)
From the website:
"...the Home Dyno is a precision timing system that
looks at a record of ignition sparks over time. Based
on when a single spark plug fires, the program can
compute acceleration, and therefore, power. The user
must supply the car's weight, gear ratios, tire sizes,
and some other variables, but the rest is pure
physics."
Sounds like just the item to justify the expenditure
of those "high performance" items you installed on
your van. :>)

Good luck,

=====
Tim Hannink
Goldibox - 1987 Vanagon Camper, Wolfsburg Edition
Winter Park, Florida
http://home.earthlink.net/~tjhannink/
http://groups.yahoo.com/group/wolfsburg_campers
http://photos.yahoo.com/tjhannink [Vanagon] Album

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