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Out & About / Re: OUT AND ABOUT 2024
« Last post by Nurse Julie on May 29, 2024, 09:41:04 PM »
Wow 🧐🧐🧐🧐🧐
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Anorak's Corner / Re: Koso gauge RPM set up
« Last post by K2-K6 on May 29, 2024, 09:15:41 PM »
I wonder if this would work

This is used on many current cars, tapping a phase on alternator to give speed signal of crank. Often on diesel that have no ignition to speak of.

Whether your kit can sense it from there I'd not know.
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Anorak's Corner / Re: Koso gauge RPM set up
« Last post by DomP on May 29, 2024, 08:43:47 PM »
The rpm is just the signal wire as the gauge is multifunction so has a supply and ground.  The signal connection is what myself and Roo worked out but could be wrong
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Anorak's Corner / Re: Koso gauge RPM set up
« Last post by McCabe-Thiele (Ted) on May 29, 2024, 08:38:24 PM »
I suspect the impulse measurement signal would be different if it includes the circuit through the coils unless it's designed to work on the feed side as this would not be affected by the coil resistance - your logic to connect on the B&W side makes more sense. Do the instructions help?
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Anorak's Corner / Re: Koso gauge RPM set up
« Last post by McCabe-Thiele (Ted) on May 29, 2024, 08:21:44 PM »
Presumably the unit itself has three connections?
Power and earth to the unit itself  plus the impulse wire that measures the number of  circuit impulses within the unit to translate that into the analogue reading?

I would have thought it ought to be connected to the blue or yellow on the points side - or do the instructions say on B&W side?
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Anorak's Corner / Re: Koso gauge RPM set up
« Last post by DomP on May 29, 2024, 08:16:04 PM »
I've tried 2 and I think I've tried 4.  I've got it wired to the black with white tracer coming from the one coil, I think that's correct.

It's terrible isn't it Ted, Koso are a pretty well known manufacturer too!
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Anorak's Corner / Re: Koso gauge RPM set up
« Last post by McCabe-Thiele (Ted) on May 29, 2024, 08:02:18 PM »
The manufacturer of your unit need to employ an accurate translation for their instructions - those are gobbledygook.
My thinking is:-
If one set of points operates  two cylinders with a wasted spark you are getting four signals for one 360 deg of rotation so setting 4 on the left side of the first table (4C-8P).  If its a 4 lobe unit. or is it setting 2 FFS I'm lost already but...

Presumably  if you get the setting wrong it will read either half the true revs or double .
Either way you should get a reading assuming the power supply wiring is polarity correct and earthed.

Update:- I keep changing my mind between setting 2 & 4 either way I cant see why you do not get some sort of output givig a reading
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Anorak's Corner / Re: Koso gauge RPM set up
« Last post by DomP on May 29, 2024, 07:51:19 PM »
I wonder if this would work
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Anorak's Corner / Re: Koso gauge RPM set up
« Last post by DomP on May 29, 2024, 07:07:57 PM »
Here's the set up guide.  Mine is an analogue rev counter Ted, I'm thinking of using the wrap around HT lead method of set up to see if that works but I'd rather the hard wired way.  There are no instructions for wrapping around even though a wire is supplied for it
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Anorak's Corner / Re: Koso gauge RPM set up
« Last post by McCabe-Thiele (Ted) on May 29, 2024, 07:07:01 PM »
An electronic rev counter works by converting the rotational impulses into either a digital or analogue display.
A rev counter for a 4 cylinder car will not work on a 3 cylinder one though manufacturers might fit a circuit so it works on both. I fitted an Audi 100 GL car  rev counter into my old Mini as both were 4 cylinder vehicles.
I assume yours will be specific for a 4 Cylinder motor cycle that uses  the wasted spark system - not a distributor
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