Well, after testing the module with the "butt dyno", it definately does work from 4500 to 7000. Not huge but definately an improvement. However the pot I used is pretty crappy and adjusted itself after 10 minutes of smashing the throttle. I am going to install a fixed resistor at 1100 ohms unless someone can give me reasons to go higher than that. I like the full throttle LED idea, this is probably the best solution to the low rpm bog issue. An RPM sensing circuit looks nice on paper but from what I have gathered cannot be easily designed to work in this Bosch system. My electronic theory knowledge isn't what it used to be so I'm going with the k.i.s.s. principle.
I did do some research on RPM sensing circuitry and it can be done based on the LM2907 IC. LM2907/LM2917 specs www.ee.washington.edu/stores/DataSheets/linear/lm2917.pdf There are many applications, I happen to like the LED tach kit which could be modified to make a mutli range shift light array AKA F1 and ALMS cars. LED Bar Tachometer circuit http://www.t-r-j.com/Auto/Tach/tachometer.htm Thanks for everyone's input. Rich Blake
