Author Topic: RPM signal for mk2 GTD rev counter?  (Read 12248 times)

Reply #15November 13, 2012, 10:07:22 am

R.O.R-2.0

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Re: RPM signal for mk2 GTD rev counter?
« Reply #15 on: November 13, 2012, 10:07:22 am »
Coming back to this subject; I have the option to use a gasser rev counter face on the GTD rev counter unit, and adjusting/changing the aforementioned resistor should help calibrate the new rev counter combination.

I have still some unresolved issues about this, however.

So, I can fix the rev counter calibration to meet my differently-sized pulley wheels, but can I at the same time also calibrate to a different gauge face?

The gasser gauge face has a different reading pattern, i.e. the numbers 1.... 2... 3... and so on, are at different distance from each other on the different face plates, diesel and gasser respectively.
So, using a different face plate on the diesel rev counter body, I might be able to adjust, say, 2000 rpm on the face to correspond to 2000 true rpm, but how would I accomplish a setting that would read true at every rpm point? Or maybe I would need to use the gasser rev counter circuit/body as well?

My goal is to make an OE-looking gauge pod that will support my 6300 rpm redline, and also the increased top speed ( I will change the speedo too).

Any ideas?

gasser tachs support 7000 revs..

GTI/16V tachs will do 8000...

ive got a regular gasser tach in my diesel, and an 8k in my 8v GTI..

(after you install a cam, and remove the rev limiter, you need more tach than they came factory with)

should be able to calibrate the diesel tach to the gasser face, or just use a whole gasser tach, drive it like we all do with the mag pickup, then its 100% accurate without messing with anything..
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Reply #16November 13, 2012, 10:34:04 am

RabbitJockey

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Re: RPM signal for mk2 GTD rev counter?
« Reply #16 on: November 13, 2012, 10:34:04 am »
Coming back to this subject; I have the option to use a gasser rev counter face on the GTD rev counter unit, and adjusting/changing the aforementioned resistor should help calibrate the new rev counter combination.

I have still some unresolved issues about this, however.

So, I can fix the rev counter calibration to meet my differently-sized pulley wheels, but can I at the same time also calibrate to a different gauge face?

The gasser gauge face has a different reading pattern, i.e. the numbers 1.... 2... 3... and so on, are at different distance from each other on the different face plates, diesel and gasser respectively.
So, using a different face plate on the diesel rev counter body, I might be able to adjust, say, 2000 rpm on the face to correspond to 2000 true rpm, but how would I accomplish a setting that would read true at every rpm point? Or maybe I would need to use the gasser rev counter circuit/body as well?

My goal is to make an OE-looking gauge pod that will support my 6300 rpm redline, and also the increased top speed ( I will change the speedo too).

Any ideas?

gasser tachs support 7000 revs..

GTI/16V tachs will do 8000...

ive got a regular gasser tach in my diesel, and an 8k in my 8v GTI..

(after you install a cam, and remove the rev limiter, you need more tach than they came factory with)

should be able to calibrate the diesel tach to the gasser face, or just use a whole gasser tach, drive it like we all do with the mag pickup, then its 100% accurate without messing with anything..

Yes i absolutely recommend either a Dakota digital converter or a magnet pick up, magnet pick up especially.  I did not Even think to mention that since he already has a diesel tach he could switch faces with.  But he magnetic pick up is definitely a good cheap way option and also will be the most accurate
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