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  #11  
Old 19th October 2011, 10:51 AM
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brainbug007 brainbug007 is offline
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Thanks Bob, that passion ford picture confirms what I thought I'm gonna have a go at making the loom bit with diodes as they only cost 2 off fleabay for enough to make 10 looms so if anyone else wants one let me know
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  #12  
Old 19th October 2011, 06:06 PM
baz-r baz-r is offline
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looking at that simple little circuit using two diodes and a zenner its converting the two signels from each coil (4 cyl wasted spark is two coils) to a single coil and dizzy type signel to run a std tacho
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  #13  
Old 19th October 2011, 07:22 PM
mark mark is offline
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Quote:
Originally Posted by baz-r View Post
looking at that simple little circuit using two diodes and a zenner its converting the two signels from each coil (4 cyl wasted spark is two coils) to a single coil and dizzy type signel to run a std tacho
Thats the general idea!
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  #14  
Old 26th November 2011, 06:24 PM
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brainbug007 brainbug007 is offline
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Finally got round to creating the bit of loom for this using the diodes, bit of a mission to get it working but I got there in the end with some help from my brother who's good at soldering Engine idles around 500 rpm and when reved up, where I thought it was close to the redline from the sound, it's only doing 3krmp
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  #15  
Old 26th November 2011, 07:08 PM
robo robo is offline
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You could always check calibration of the rev counter with a decent timing light. Some of those rev counters have a trim screw in them.

Bob
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