low-cost performance measures (Powerdyn)
#1
low-cost performance measures (Powerdyn)
Hello,
I am looking forward to do a PowerDyn setup (http://www.powerdyn.fr/English/PowerDyn.html) on my car.
This is a low-cost dyno-like system, that gives a rough image of performance changes between different setups.
All you need is to get a tach signal and send it to your laptop's line in (or record it with a MD or MP3 recorder, then process it on your desktop computer).
A suggested setup is like this:
The signal is taken from the negative terminal on the coil, which gives an inverted signal.
I would like to grab the signal from the ECU harness.
I've had a look at the schematics there: http://miataturbo.wikidot.com/ms2-h.
I also found this, which seems to be for a 94+ NA:
2I would be perfect, but on MT's NA schematics it is not connected on my 91' NA.
So far, I see:
- 1G ou 1H, it seems connected to the negative coil terminal. What do you think of it? Does it seems OK to you?
- 2E (CAS). This wire seems sensitive to perturbations. I don't feel confident in connecting there.
Thanks
I am looking forward to do a PowerDyn setup (http://www.powerdyn.fr/English/PowerDyn.html) on my car.
This is a low-cost dyno-like system, that gives a rough image of performance changes between different setups.
All you need is to get a tach signal and send it to your laptop's line in (or record it with a MD or MP3 recorder, then process it on your desktop computer).
A suggested setup is like this:
The signal is taken from the negative terminal on the coil, which gives an inverted signal.
I would like to grab the signal from the ECU harness.
I've had a look at the schematics there: http://miataturbo.wikidot.com/ms2-h.
I also found this, which seems to be for a 94+ NA:
2I would be perfect, but on MT's NA schematics it is not connected on my 91' NA.
So far, I see:
- 1G ou 1H, it seems connected to the negative coil terminal. What do you think of it? Does it seems OK to you?
- 2E (CAS). This wire seems sensitive to perturbations. I don't feel confident in connecting there.
Thanks
#5
Boost Pope
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Join Date: Sep 2005
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I'm lazy on finding another path through the firewall to the passenger's side if I can avoid it
That's the tach signal. 0-12v squarewave.
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Zaphod
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10-26-2018 11:00 PM