stprasinz Posted March 26, 2009 Share Posted March 26, 2009 ok heres one why use only a 1/4 watt resistor as a pull up for the ignition signal from dist. foir megasquirt, and not a full 1 watt????? i have a 1/4 watt 1k resistor, and a full 1 watt 1k resistor.. the guy at radio shack saidyep thats a bigger one cuz thats a watt.. ok so let e guess this is a smaller one cuz its a 1/4 watt... oh and you get more cuz there both 99cent and one you get 2 and the other 6 wow mr radio shack you are a pelithora of knowledge and i'm a genious who can't spell lol dur.. Quote Link to comment Share on other sites More sharing options...
bjhines Posted March 26, 2009 Share Posted March 26, 2009 You need an education bad man. Simple math will tell you if you need a higher wattage resistor. Don't 4uck with electricity until you know who Ohm was and all about his law. Quote Link to comment Share on other sites More sharing options...
stprasinz Posted March 26, 2009 Author Share Posted March 26, 2009 ok so go with what was claimed by numerous other people since I am trying to install a engine management system and bought it fully assembled as to eliminate that type of frustration... but as for schooling i would rather aim my schooling to other thngs to help my car run better be faster smoother corner better and be all around better than trying to cram $h!t i don't care about.... I got an iq of 128 and can't spell for my life, don't care much about electricity for the most part either... but got a slight bit of knowledge of car!) and that wasn't in my intelegent quota wtfe test..... hmmmm Quote Link to comment Share on other sites More sharing options...
bjhines Posted March 26, 2009 Share Posted March 26, 2009 Fire fire fire!!!! Quote Link to comment Share on other sites More sharing options...
zercs280zx Posted March 27, 2009 Share Posted March 27, 2009 I was told that the MSI v 3.0 board will pick up the signal from a 280ZX turbo or na dizzy without a pullup resistor... can anyone confirm this? Quote Link to comment Share on other sites More sharing options...
letitsnow Posted March 27, 2009 Share Posted March 27, 2009 power(wattage) = volts x amps You have 12 volts and amps are defined as volts / resistance 12/1000=.012 amps 12 x .012 = .144 watts A 1/8(.125) watt resistor is too small, so we use a 1/4(.25) watt one. Anything larger is overkill and unnecessary. Quote Link to comment Share on other sites More sharing options...
stprasinz Posted March 27, 2009 Author Share Posted March 27, 2009 thank youu very much I appreciate the actual answer to my question instead of a poke poke now if i can get the triggar angel Ill be all set!) i got what I think will be a good safe base tune for my setup.. and will gladly be posting all my write up once its up and running !) Quote Link to comment Share on other sites More sharing options...
mobythevan Posted March 31, 2009 Share Posted March 31, 2009 It doesn't hurt anything to use the 1 watt resistor for the pullup if that is what you have in your parts bin at home. But 1/4 watt is correctly sized for this circuit. EDIT: I noticed at the bottom of the sticky is a note that someone was using a 1 watt and kept burning up HEI modules? Not sure why, but interesting. Quote Link to comment Share on other sites More sharing options...
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