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Old 09-10-2008, 12:05 AM   #25 (permalink)
dcb
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Cool, some more unsolicited thoughts:

Note the analogRead*1000 reading and the pressure gauge reading at minimum pressure.

Note the analogRead*1000 reading and the pressure gauge reading at maximum pressure.

Note the analogRead*1000 reading and 25% pressure. At 50% and 75%

Graph and determine linearity or if curve function needed to predict pressure from analogRead.


the injectorDelay is probably a lot less than the typical 500. That initial pulse probably isn't 500us long. Might just be 100 us. How long is the pre-pulse?

The flow is a function of time and differential pressure. You have the input pressure, might need to guess at the BMEP (150.8 x TORQUE (lb-ft) / DISPLACEMENT (ci) ). Given that your injectors are at like 3000 psi at idle, and bmep is maybe 300 psi at full throttle? It won't represent more than a %10 error, should be much less. But worth thinking about.

What is redline on that anyway?
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