hi
i was thinking about the fuel maps in the standard ecu, particularly the behaviour shown by the injectors when the boost is turned up past the mapped level of 12psi.
i have been running my car with the turbo pressure sensor blanked off (so no fuel cut) and at roughly 15psi for around a year, with no problems whatsoever. this includes the rather abrasive haynes track and a visit to the nurburgring, so i am reasonably confident in the safe power level of my car at the minute.
i have plumbed an AFR gauge into the narrowband O2 sensor and it shows full rich when going on boost, and holds full rich right up to the redline. i know all about the fallacies of using a narrowband to monitor the AFR, but at least this is better than nothing
i would also like some way of monitoring injector duty cycle, i know i am pushing the injectors pretty hard (stock 440cc/minute). is there a cheap and dirty way this can be done? even if its as simple as plugging a multimeter into the ecu and reading off bare voltages, then looking up the corresponding flowrates on a table. mind you, i have a feeling i need to look at the number of pulses/sec so an oscilliscope type device would be required
im interested in your thoughts on this. just a geeky little device would be cool, even if its just used once or twice when setting up boost levels when the fmic is welded in.
cheers
andy