hey all,, I have a nitro powered rc car and need an accurate way to measure the engine temp and rpm's... Any ideas? I have thought of putting a magnet on the flywheel and building something to measure how many times per second it spins around. but this would put the tiny (.15) engine out of balance.. the temp shouldn't be that hard but im drawing blanks with the tach. I figure a thermyster with a 7segment display would do the job for the temp. Any suggestions on an ic to do the work?