Rev Counter Under Reading
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I had problems with mine reading low, not as much as yours. This just started and the error increased. I have always had a Aldon ignitor unit. I sent off my tacho to Speedy in south Wales. They fiited a new interior unit matched to the ignition. It now reads as accuarte as my mulitmeter test unit. It did come back as a voltage sensed unit as oppposed to an "in series" current sensed one. I think it was about ?80 with post and packing.
It is well known that the old RVI (i think) unit is not suitable for electronic ignition and tends to want to bouce anyway. So even if it were accuarte it has problems. There are articles about it on the net and I think on this site.
Purests like the old mechanism and dont like to tinker. I like to know were I am reving to!
regards Mike
It is well known that the old RVI (i think) unit is not suitable for electronic ignition and tends to want to bouce anyway. So even if it were accuarte it has problems. There are articles about it on the net and I think on this site.
Purests like the old mechanism and dont like to tinker. I like to know were I am reving to!
regards Mike
Mike
Elan S4 Zetec
Suzuki Hustler T250
Suzuki TC120R trailcat
Yamaha YR5
Suzuki Vstrom 650XT
Suzuki TS185K
Elan S4 Zetec
Suzuki Hustler T250
Suzuki TC120R trailcat
Yamaha YR5
Suzuki Vstrom 650XT
Suzuki TS185K
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miked - Coveted Fifth Gear
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- Joined: 29 Sep 2003
I fitted an aldon ignitor and the tacho bounced like mad. I replaced the coil with a sport coil and renewed the ignition leads and its now rock solid and I noticed an increase in peformance an no more sooted plugs! I didnt convert my tacho.
I wonder if the problems with the electronic ignition is that the power of the signal to the coil is reduced (ie the current , assuming V stays the same: P=V*I) and the current sensing tacho struggled for a signal.
Aldon do recomend a sport coil for the ignitor.
I know its only the signal to the coil that goes through the tacho but perhaps the type of coil effects the signal.
<_<
Dave 1970 S4
I wonder if the problems with the electronic ignition is that the power of the signal to the coil is reduced (ie the current , assuming V stays the same: P=V*I) and the current sensing tacho struggled for a signal.
Aldon do recomend a sport coil for the ignitor.
I know its only the signal to the coil that goes through the tacho but perhaps the type of coil effects the signal.
<_<
Dave 1970 S4
- dmreeceuk
- Second Gear
- Posts: 102
- Joined: 15 Sep 2003
Me again! I have the Aldon flame thrower coil with my ignitor so I am matched up. Mine was acting up with the pair.
My friend has my old plus two and we found that the tacho tends to be stable when the plugs are new. As they age and build with carbon the tach bounces. This is why I went for the change of guts. To be fair the unit was designed around points.
regards Mike
My friend has my old plus two and we found that the tacho tends to be stable when the plugs are new. As they age and build with carbon the tach bounces. This is why I went for the change of guts. To be fair the unit was designed around points.
regards Mike
Mike
Elan S4 Zetec
Suzuki Hustler T250
Suzuki TC120R trailcat
Yamaha YR5
Suzuki Vstrom 650XT
Suzuki TS185K
Elan S4 Zetec
Suzuki Hustler T250
Suzuki TC120R trailcat
Yamaha YR5
Suzuki Vstrom 650XT
Suzuki TS185K
-
miked - Coveted Fifth Gear
- Posts: 1239
- Joined: 29 Sep 2003
I have a plus 2 with standard set up but my tacho which was working for a short while has stopped working altogether, where does the signal come from the coil or the distributor? Also I have two wires that are not conected to the coil but are right next to it any ideas? Last question, my supressor is not conected at the moment to the coil as it doesn't have a long enough lead? All of the above are how I have found the car from the prevous owner?
- the rolfie
- First Gear
- Posts: 20
- Joined: 13 Apr 2004
I would guess that the set up is the same as the baby elan. Get yourself a copy of the workshop manual as it has wiring diagrams. However if your car's wiring is in the same state as mine when I received it the wiring diagram will not help - 30+ years of patches, jumps and hacks leaves you with a rats nest. I completely rewired my car last winter.
Anyway back to the point :rolleyes: The wire which should be white, goes from the ignition switch via the tacho to the coil. The coil is then connected to ground via points or electronic points. As the points open and close the coil draws current via the tacho in pulses and thus the tacho goes round. QED.
Anyway back to the point :rolleyes: The wire which should be white, goes from the ignition switch via the tacho to the coil. The coil is then connected to ground via points or electronic points. As the points open and close the coil draws current via the tacho in pulses and thus the tacho goes round. QED.
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steveww - Coveted Fifth Gear
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