Ignitech V88 not reading the same as the ND Tacho.

S

stanfordcg

Junior member
Location
Cambridge
Installed Ignitech TCIP4 on my 3CL using standard pick-ups and base map supplied by Ignitech. All seems fine, bike starts and runs (on the bench at the moment). However i have notice the Rev-counter (ND) does not read the same as the V88 software. Not done a accurate comparison but I would say there is about 30% difference.

Has anyone noticed this?

Not sure if I have a setting wrong or the Tacho is incorrect.
 
open the software and go to the 2nd page labelled "Bike"
top left of the page you have Tachometer settings which should be set at 1 pulse per revolution
they also include a correction setting which should be set at "0" on your bike

 
Your question is a little ambiguous.

Are you driving an electronic tacho from the Ignitech's tacho output? If so, Red's reply should enable you to fix it.

If (as I suspect with a 3CL) you have a cable-driven tacho that's not reading the same as the Ignitech software when you have your computer plugged in to the bike, then it's a different issue. The ignition system has to know what it's doing to fire the plugs at the right time, so  the software should be giving the correct rev reading.  That means your ND tacho is incorrect, which is not unusual.

You might get some improvement by sending the tacho to a speedometer service guy to re-calibrate it. Simplest thing to do is leave it as is and make a mental correction.

Cheers,
Cam

Edit: You posted while I was typing. Answered the question as to what sort of tacho you have :)
This bloke (Marcel in Netherlands) might be able to help you http://www.cb750faces.com/cb750faces.nl/en/

 
G'day Red.  I would be very surprised if the tacho output settings had anything to do with the revs displayed on the software screen.  I reckon those settings only configure the tacho signal at pin 15.


 
I also have a TCIP4 on my CB900 driving an electronic Tacho and used the setting mentioned to sync the laptop reading to the tacho. On the the 3CL the tacho is driven from the cam, I am reading the TCIP4 value on my laptop.

The values are 1 and 0.

The bike was not running when I got it so no idea how accurate the Tacho is. I have a supposition the tacho has been replaced at some point as it looks in better condition than the Speedo.

Its possible the tacho might have come from another bike (Honda perhaps) as it did not have the Laverda Logo on it and the Needle look different, (I have replace the face on it with a Laverda one).

Could it be a different ratio?
 
Honda tachos are a different ratio to Laverda ones, I think you have found your problem.  And obviously, regardless of what any tacho says, the ignitech software is the true rpm reading.  I generally find that once you have a rev limiter in place then the tacho becomes somewhat redundant.
 
breganzane said:
  I generally find that once you have a rev limiter in place then the tacho becomes somewhat redundant.
Click to expand...

That's what I found too, the only time I ever had concerns was during noise testing.

When racing, the last thing I ever wanted to do was to take my eyes off the track to read a needle ? it's pure distraction :-)
 
Robjota said:
That's what I found too, the only time I ever had concerns was during noise testing.

When racing, the last thing I ever wanted to do was to take my eyes off the track to read a needle ? it's pure distraction :-)
Click to expand...

I was dead chuffed to score 122dB, on dB meter at one metre from exhaust at Balkburg LCN Pinkerstreffen. Roger Lyes scored 128dB with his 3 - 1 open 1200 pipe but we was all beaten by the Cali 3 senza silentia ;)  130dB :)
 
You must log in or register to reply here.
Back
Top