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One for the sparkies out there, The rev counter I've just fitted is reading about double what it should do, can I fit a resistor in the line or perhaps a rheostat so that I can set it just right?  |
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barty
Posted a lot
Posts: 1,088
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some have a switch at the back to select the number of cylinder on the engine, might be worth a look
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nothing that simple I'm afraid
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MiataMark
Club Retro Rides Member
Posts: 2,961
Club RR Member Number: 29
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Rev counter issueMiataMark
@garra
Club Retro Rides Member 29
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That sounds like a set-up issue, a resistor won't make any difference as it's counting pulses not level (I think). Who's the manufacturer?
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1990 Mazda MX-52012 BMW 118i (170bhp) - white appliance 2011 Land Rover Freelander 2 TD4 2003 Land Rover Discovery II TD52007 Alfa Romeo 159 Sportwagon JTDm
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Is that a motorbike item ?
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yes, cheep chinese universal one
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You might be able to change the settings somewhere, with dip switches or jumpers inside. If not, you'll need to make a frequency divider circuit to blank every other pulse.
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yes, I've been told I might look for a pulse divider
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at the moment I'm taking it off the coil, yes, I was told to look for a flip flop.
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MiataMark
Club Retro Rides Member
Posts: 2,961
Club RR Member Number: 29
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Rev counter issueMiataMark
@garra
Club Retro Rides Member 29
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Having a quick look on eBay at similar units most are suitable for either 2 or 4 cylinder engines there must be a selector somewhere for that. Have you tried the mode button?  |
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1990 Mazda MX-52012 BMW 118i (170bhp) - white appliance 2011 Land Rover Freelander 2 TD4 2003 Land Rover Discovery II TD52007 Alfa Romeo 159 Sportwagon JTDm
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Yep,tried them all, but I'll have another go tomorrow, where did you get that picture ^^^^^^
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MiataMark
Club Retro Rides Member
Posts: 2,961
Club RR Member Number: 29
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Rev counter issueMiataMark
@garra
Club Retro Rides Member 29
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1990 Mazda MX-52012 BMW 118i (170bhp) - white appliance 2011 Land Rover Freelander 2 TD4 2003 Land Rover Discovery II TD52007 Alfa Romeo 159 Sportwagon JTDm
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Some bikes have dual output coils so the actual trigger pulse is the same for 2 & 4 cylinder engines. The dual type coils therefore provide a redundant spark to the cylinder that isn't on compression stroke. No adjustment therefore needed for number of cylinders.
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