I still need to add a TLC 555 one shot to make sure the
trigger pulse from the crank angle sensor is at least 1 ms long.
The neat thing about this A to D module is it has a 5 volt supply output
that can be used to power the pressure sensors and the TLC 555
one shot pulse generator.

BTW this a powerful little computer despite the low under $100
cost. Lots of input and output. There are two PWM outputs for driving injectors.
One could easily turn one of these  things into a complete EFI system along
with an interface to a net book for monitoring AND recording all engine
parameters as well as running GPS based moving may software. All you
need to do is learn how to program a PIC. Some C source code is attached
here. The USB interface makes it  extremely easy to program and easy to
send engine data to the net book. There are drivers for windows as well
as Linux. Not my cup of tea however as software is intrinsically buggy :)
I like the simple TLC 555 total hardware approach.

One of these things makes up for the loss of direct hardware access
to the PC when Windows came out. Multitasking systems play hell with
real time mechanical device control. All the real time control stuff
can be done with one of these.

http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en010300

Paul Lamar