James Thorburn Posted October 31, 2011 Report Share Posted October 31, 2011 Hi all, Not sure what happened to the first post but i'll try this again. I've got a couple of questions. 1. Setting up dwell settings, Is it a matter of starting at small times and building up untill it stops misfiring at the given voltage? Is there a more accurate way of doing this Does any one have some dwell settings for an m50-54 engine that will get me started 2. How do you wire in 4 wire narrow band 02 sensors? It was wired +12v to sensor heater, sensor heater ground(going to ecu), Sensor input (from ecu) and sensor signal (to ecu) The exhaust has 2 banks of 3 cylinders. I was going to run narrowbands in both and a wideband in one. Is it even worthwhile to use the narrow bands other then to compare from bank to bank 3. What size fuse is usually used before the ecu? I'm sure this depends a lot on the outputs but is there a general 'this will be fine and prevent a big mess fuse'? Any help would be much appreciated Cheers, James Quote Link to comment Share on other sites More sharing options...
Josh Burt Posted November 1, 2011 Report Share Posted November 1, 2011 I am also running an M52 2.8L, I am running a CDI ignition so dwell setup isn't needed. I have heard the correct way to determine coil dwell is to use an oscope to see how long it takes the coil to charge, though I have never done that. Â O2 sensor wise, I would ditch the narrowbands and either run a single wideband that reads all 6 cylinders or put a wideband in each bank. I am running a turbo and have a single wideband post turbo. Quote Link to comment Share on other sites More sharing options...
James Thorburn Posted November 3, 2011 Author Report Share Posted November 3, 2011 Sorry about my last post and the lack of spacing between paragraphs. Still struggling to use this forum I had considered running some sort of cdi for the simplicity of it. But the g4 should be perfectly capable to run the factory coils, so might as well use what i've got. So i'd need to some how bench test the coils. My thinking is to set up a variable voltage and some sort of timing wheel setup. Then is it a matter of meausuring the current untill it reaches coil saturation? Another problem is that i've got an oscilloscope but no access to a current clamp, will measuring the voltage over a shunt give me suitable results? Is this the sort of procedure I should be doing to find out the prefered dwell? Can a g4 generate its own timing signal without any input. I'm not sure if i have anything that will spin up to 7k rpm Any advice on this would be much appreciated Quote Link to comment Share on other sites More sharing options...
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