Author Topic: Diesel Tach  (Read 7196 times)

November 19, 2004, 08:21:32 pm

type2 idi

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« on: November 19, 2004, 08:21:32 pm »
I'm putting a 1,9l IDI in my 77 westfalia, I know that the send for the tach is the w on the alternator, can i use any aftermarket tach? :?


A-Bus-with-no-name 77
Fox 88

Reply #1November 20, 2004, 11:26:41 am

VWRacer

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« Reply #1 on: November 20, 2004, 11:26:41 am »
I searched eBay for "vw diesel alternator" and found this one[/u].

Or search your local salvage yard.  :wink:
Stan
C-Sports Racer

Reply #2November 25, 2004, 12:48:15 pm

addautomotive

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« Reply #2 on: November 25, 2004, 12:48:15 pm »
Quote
I'm putting a 1,9l IDI in my 77 westfalia


You say that so casually! Details please! are you using a kennedy adapter, or a vanagon diesel bellhousing? I was going to do something like this, but the deal fell through on the van.
Jake
1990 4Runner (diesel swap underway)
'99 Benz e300d (SVO conversion underway)

***Garage full of 1.6 + 1.9 bits[/url]***

Reply #3November 29, 2004, 05:26:49 pm

type2 idi

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« Reply #3 on: November 29, 2004, 05:26:49 pm »
No I'm not using either, I have a Adapter plate like Kennedy that I sell, It's made of Billet Aluminum rather that cast iron, much stronger!!! :D If you what more info let me know I can maybe post pictures here :wink:
A-Bus-with-no-name 77
Fox 88

Reply #4November 30, 2004, 10:32:26 am

addautomotive

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« Reply #4 on: November 30, 2004, 10:32:26 am »
Yoiks! More info please, and PICS!

What flywheel do you use, or do you use one from a VW fox, vanagon diesel etc...

what do you charge for the adapter plate?
Jake
1990 4Runner (diesel swap underway)
'99 Benz e300d (SVO conversion underway)

***Garage full of 1.6 + 1.9 bits[/url]***

Reply #5November 30, 2004, 01:22:06 pm

fspGTD

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« Reply #5 on: November 30, 2004, 01:22:06 pm »
Quote from: "VWRacer"
I searched eBay for "vw diesel alternator" and found this one[/u].

Or search your local salvage yard.  :wink:


You can't just use any ol' VW diesel alternator to find the "W" terminal... it's got to be off of one that originally had either a factory tachometer or an upshift light.  (I think they started putting in the upshift lights in '83 or '84... I know that '84s have the upshift light and therefore the "W" terminal on the alternator.)
Jake Russell
'81 VW Rabbit GTD Autocrosser 1.6lTD, SCCA FSP Class
Dieselicious Turbocharger Upgrade/Rebuild Kits

Reply #6November 30, 2004, 02:28:31 pm

type53b_gtd

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« Reply #6 on: November 30, 2004, 02:28:31 pm »
Quote from: "fspGTD"

You can't just use any ol' VW diesel alternator to find the "W" terminal... it's got to be off of one that originally had either a factory tachometer or an upshift light.  (I think they started putting in the upshift lights in '83 or '84... I know that '84s have the upshift light and therefore the "W" terminal on the alternator.)


The dynamic (ie. twin sensor) oil pressure warning system arrived at the same time as the upshift light, and also takes input from the W terminal.    After the upshift light was abandoned (around 88 MY in North America for most cars) the oil pressure warning system continued to rquire W terminal input.

I seem to recall the dynamic oil pressure warning system was introduced in late 82 on Jettas, but was certainly there by '83.

Drew

Reply #7November 30, 2004, 03:40:23 pm

fspGTD

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« Reply #7 on: November 30, 2004, 03:40:23 pm »
Quote from: "type53b_gtd"

The dynamic (ie. twin sensor) oil pressure warning system arrived at the same time as the upshift light, and also takes input from the W terminal..


Yes, very true!
Jake Russell
'81 VW Rabbit GTD Autocrosser 1.6lTD, SCCA FSP Class
Dieselicious Turbocharger Upgrade/Rebuild Kits

Reply #8November 30, 2004, 03:56:52 pm

vwmike

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« Reply #8 on: November 30, 2004, 03:56:52 pm »
I seem to recall seeing something about a page telling how to build your own circuit to work with like a GTI tach....of course this was before I had a diesel so I didn't care. Can anyone point me in that direction?

Reply #9November 30, 2004, 04:03:44 pm

fspGTD

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« Reply #9 on: November 30, 2004, 04:03:44 pm »
http://home.comcast.net/~vwgtd/vwdslfaq.txt

issues with this mod: Resistor values may need to be tweaked a little bit.  It also doens't work well at high RPMs - acceptable for a street driven / daily driver type turbo diesel with stock governor settings, but probably not for performance modded governor.  If we could figure out a better way to modify this circuit to work at high RPMs off the W-terminal, it would be a nice addition.
Jake Russell
'81 VW Rabbit GTD Autocrosser 1.6lTD, SCCA FSP Class
Dieselicious Turbocharger Upgrade/Rebuild Kits

Reply #10November 30, 2004, 06:55:59 pm

vwmike

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« Reply #10 on: November 30, 2004, 06:55:59 pm »
Thanks... I think i already have everything needed  :D

Reply #11November 30, 2004, 09:34:11 pm

Rat407

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« Reply #11 on: November 30, 2004, 09:34:11 pm »
So if I unplug the w terminal connector i will not have to listen to my oil warning/buzzer anymore?  Cool Beans, Also what model VW did the diesel tach come in?  I take it they were rare?
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Reply #12November 30, 2004, 10:11:58 pm

Piper106

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« Reply #12 on: November 30, 2004, 10:11:58 pm »
Dakota Digital makes their DSL-2 system ($110.95 per their web site www.dakotadigital.com) that has a sensor that looks at the teeth on the flywheel ring gear.  You set the dip switches on the box to tell the system how many teeth on the gear and it gives you "a standard 4 cylinder tachometer signal".  Plug and play.

Piper106

Reply #13December 01, 2004, 06:00:01 pm

RAMMSTEIN

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« Reply #13 on: December 01, 2004, 06:00:01 pm »
Piper106, your link ain't working mate. :(
Rammstein

In abscence of light, darkness prevails.

Reply #14December 04, 2004, 09:12:00 am

Piper106

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« Reply #14 on: December 04, 2004, 09:12:00 am »
The end ) gets pulled in and messes up the link.

The correct address is  www.dakotadigital.com

Piper106