Author Topic: Gas Tacho / Revcounter Conversion to Diesel W terminal  (Read 138683 times)

Reply #15August 01, 2008, 03:59:14 pm

stuvy

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Gas Tacho / Revcounter Conversion to Diesel W terminal
« Reply #15 on: August 01, 2008, 03:59:14 pm »
From what I can tell you need to run a wire from the W terminal to the cluster. I am still waiting for my MK1 bentley to arrive in the mail.
So I guess my question becomes what terminal do I run the wire too?
The tachometer in question is an 83 Westmoreland GTI cluster.
Thanks in advance.

Reply #16August 07, 2008, 06:41:47 pm

RabbitJockey

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Gas Tacho / Revcounter Conversion to Diesel W terminal
« Reply #16 on: August 07, 2008, 06:41:47 pm »
Quote from: "stuvy"
Once the tach is moded, is it a straight put in the dash ordeal. Or do I need to run new wires?
I am working on a 82 rabbit FYI.


You need to run a wire from the w terminal to the cluster, i spliced mine in with wire number 5 per the bently, if i recall right.  u could also just crimp one of the circular electrical connectors on the end of your new wire and put it on the signal post on the back of the tach.  if you have a rabbit with the dynamic oil light then none of this is necessary, but i don't believe that was introduced until 1983
98 Pontiac Grand Prix GT:stock daily
 81 Jetta: in progress 1.6td, ported head, holset turbo.
81 Rabbit:AAZ, hybrid T3 turbo, Giles pump, lightened fw, and yellow clutchnet clutch.

Reply #17August 07, 2008, 06:42:40 pm

RabbitJockey

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Gas Tacho / Revcounter Conversion to Diesel W terminal
« Reply #17 on: August 07, 2008, 06:42:40 pm »
Quote from: "Krazy"
Do you have an easy way to get the cluster out of the dash?  I have trouble getting the cable unhooked from the cluster.


hey usually what i do to get the speedo cable off is i lay on my back and reach up in front of the fuse panel and grab the cable and take it off that way, it seems to work well, another thing you could try is removing the speaker, i think that lets u reach behind it as well, but i'm not sure since i never did it that way.  also theres a button on the bottom of the headlight switch that releases the switch knob.
98 Pontiac Grand Prix GT:stock daily
 81 Jetta: in progress 1.6td, ported head, holset turbo.
81 Rabbit:AAZ, hybrid T3 turbo, Giles pump, lightened fw, and yellow clutchnet clutch.

Reply #18August 07, 2008, 11:49:09 pm

stuvy

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Gas Tacho / Revcounter Conversion to Diesel W terminal
« Reply #18 on: August 07, 2008, 11:49:09 pm »
Quote from: "Trev0rbr"
Quote from: "stuvy"
Once the tach is moded, is it a straight put in the dash ordeal. Or do I need to run new wires?
I am working on a 82 rabbit FYI.


You need to run a wire from the w terminal to the cluster, i spliced mine in with wire number 5 per the bently, if i recall right.  u could also just crimp one of the circular electrical connectors on the end of your new wire and put it on the signal post on the back of the tach.  if you have a rabbit with the dynamic oil light then none of this is necessary, but i don't believe that was introduced until 1983


Yeah I am working with a cluster from an 83-84 I forget at the moment. Thanks for the info, I'll try and get this thing to work. So it should just be a plug and play thing, with 1 connection on the number 5 wire?
Thanks.

Reply #19August 08, 2008, 01:18:30 am

RabbitJockey

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Gas Tacho / Revcounter Conversion to Diesel W terminal
« Reply #19 on: August 08, 2008, 01:18:30 am »
yeah i'm not sure exactly which wire it is tho, check the bentley
98 Pontiac Grand Prix GT:stock daily
 81 Jetta: in progress 1.6td, ported head, holset turbo.
81 Rabbit:AAZ, hybrid T3 turbo, Giles pump, lightened fw, and yellow clutchnet clutch.

Reply #20September 07, 2008, 02:48:34 pm

53 willys

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Gas Tacho / Revcounter Conversion to Diesel W terminal
« Reply #20 on: September 07, 2008, 02:48:34 pm »
anybody else having trouble seeing the pics in the first post??
91 Jetta GLI=1.6TD conversion Clutchnet 210mm 24spline sprung RACE clutch~lightened flywheel~port and polished head~ARP head [email protected]~1.6MLS head gasket~BB T3 turbo~11mm pump~DN0SD273 tips~Intercooled~3" Turbo back~
vwdieselforum.com

Reply #21September 08, 2008, 05:37:24 pm

zukgod1

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Gas Tacho / Revcounter Conversion to Diesel W terminal
« Reply #21 on: September 08, 2008, 05:37:24 pm »
I dont see anything either.
dan

99 Golf TDI (now CNG powered) , 82 TD Caddy

Reply #22September 08, 2008, 06:26:13 pm

Smokey Eddy

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Gas Tacho / Revcounter Conversion to Diesel W terminal
« Reply #22 on: September 08, 2008, 06:26:13 pm »
i wish very much that these photos were still here :(
Ed
Blacked out mk2 AAZ Jetta RIP. You will be are missed.
White 1999.5 ALH Golf 2dr. 2" wider. 2.5" lower.

Reply #23September 08, 2008, 08:58:29 pm

blkboostedtruck

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Gas Tacho / Revcounter Conversion to Diesel W terminal
« Reply #23 on: September 08, 2008, 08:58:29 pm »
is there a way to get them back through archives?
Duane
injector rebuilds call  414-840-1395 for faster service not on line much!
'66 variant 1500S
'81 2dr n/a 1.6 diesel rabbit 8"lift 260K R.I.P.
'81 caddy gas 1.8 turbo/stroker W/N.O.S.
'81 caddy 1.9 turbo diesel
'82 caddy gas 1.8 G60
 3 jettas '82' '04 '14TDI
+1 rabbit,03 HD sc.eag. duece,46,&5

Reply #24September 10, 2008, 09:34:58 pm

53 willys

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Gas Tacho / Revcounter Conversion to Diesel W terminal
« Reply #24 on: September 10, 2008, 09:34:58 pm »
Quote from: "libbybapa"
I have the thread as a pdf with all images intact.  Anyone want to host it?

Andrew

I dont know how or if I can host it????
but you could email it to me right???
91 Jetta GLI=1.6TD conversion Clutchnet 210mm 24spline sprung RACE clutch~lightened flywheel~port and polished head~ARP head [email protected]~1.6MLS head gasket~BB T3 turbo~11mm pump~DN0SD273 tips~Intercooled~3" Turbo back~
vwdieselforum.com

Reply #25September 19, 2008, 10:09:54 am

daveo

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UK Tachometer Conversion
« Reply #25 on: September 19, 2008, 10:09:54 am »
Hi there, sifting through this article about the conversion of stock VW VDO Tachometers to run on a Diesel.

I have a 1.6 N/A fitted to my '82 Jetta with an alternator from a 1991 Diesel Caddy. I have a standard Mk1 Tacho-when I connected the input of this directly to the W-Terminal on the alternator i got a reading of about 6000RPM (at idle!!). Using the trimmer on the back I was able to get this down to about 4000RPM and at both times the readouts seemed to increase roughly corresponding to the engine speed.

My Question: By installing another Variable Resistor and fine trimming it will I be able to get an accurate read-out on the Tacho or not, and will it cause damage to the tacho itself?  :?

Any help will be much appreciated!

Dave

Reply #26October 31, 2008, 06:39:26 pm

79rabbit4dr

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Gas Tacho / Revcounter Conversion to Diesel W terminal
« Reply #26 on: October 31, 2008, 06:39:26 pm »
I'm thinking about buying this unit (think it's from a GTI) for $20, will it work in my 81 1.6l na or is there a better one I should buy?



here is the cluster I have right now.

Paul
LOCATION = Idaho 83440
----------
1979 Rabbit 4dr Gasser - For Parts
1981 Rabbit 4dr Diesel - For Parts
1981 Rabbit Pickup 1.6 NA - For Parts
1983 Jetta Coupe 1.6 TD - Feeler Part out
1997 Jetta VR6 - Part Out

Reply #27November 03, 2008, 02:45:01 pm

lord_verminaard

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Gas Tacho / Revcounter Conversion to Diesel W terminal
« Reply #27 on: November 03, 2008, 02:45:01 pm »
Quote from: "libbybapa"
click to download

See if that works.  Cheers.

Andrew


Try this one instead:
http://www.filefactory.com/file/c097dc/n/Gas_Tach_Conversion_pdf

Thanks!
Brendan
81 Scirocco 'S -->Soon to be m-TDI
93 Corrado SLC VR6
'86 Golf N/A Diesel  -->Wife's car
1990 Audi CQ
05 New Beetle PD TDI


"I am a man, I can change... if I have to.... I guess....."

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Reply #28November 29, 2008, 05:10:27 pm

jimbote

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using gasser tach with inductive pickup.....
« Reply #28 on: November 29, 2008, 05:10:27 pm »
tried this today....gonna keep posted on the workability....basically hooked up an 83 GTI tach to a battery and a ford V8 distributer....no coil no module....just the inductive pickup and trigger wheel....with my 750 rpm drill at full blast the tach registered just under 3K....and was smooth down to almost zero rpm....so I cut six of the trigger "arms" off of the wheel leaving two at 180 apart and buzzed the drill up to full speed...the tacho was smooth reading around 500 rpm....probably could be adjusted out with the pot.....I have already built a bracket to house an inductive speedo pickup from a late model ford tranny....it will be pointing at the four balancer bolts at the front of the crank....two of which will be spaced out so as to trigger the sensor only twice per rev....I'll be working this manana and I'll keep posted (with pics)  but looks promising so far :D

Reply #29November 30, 2008, 04:46:32 pm

jimbote

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Re: using gasser tach with inductive pickup.....
« Reply #29 on: November 30, 2008, 04:46:32 pm »
Quote from: jimbote
tried this today....gonna keep posted on the workability....basically hooked up an 83 GTI tach to a battery and a ford V8 distributer....no coil no module....just the inductive pickup and trigger wheel....with my 750 rpm drill at full blast the tach registered just under 3K....and was smooth down to almost zero rpm....so I cut six of the trigger "arms" off of the wheel leaving two at 180 apart and buzzed the drill up to full speed...the tacho was smooth reading around 500 rpm....probably could be adjusted out with the pot.....I have already built a bracket to house an inductive speedo pickup from a late model ford tranny....it will be pointing at the four balancer bolts at the front of the crank....two of which will be spaced out so as to trigger the sensor only twice per rev....I'll be working this manana and I'll keep posted (with pics)  but looks promising so far :D


OK this works like a charm!!! :D .....for anyone not wanting to solder new caps or resistors on your tach this will work and give an accurate tacho signal with no mods to the tach or calibration of the tach for that matter.....some things I changed from my original idea of pointing the sensor at the pulley bolts was to use two 3/8 nuts welded to the outside of the crank pulley exactly 180 apart and have the sensor pointed at the nut facet with about .020 clearance....the old idea simply had too much bracket hanging over the sprocket add to that thrust clearance variance and it may have thrown off the gap and thus the reading.....good luck!!










« Last Edit: November 16, 2010, 07:45:55 am by jimbote »