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kalispell365
Samba Member
Joined: April 01, 2010
Posts: 889
Location: PNW
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coclimber
Samba Member
Joined: July 18, 2013
Posts: 245
Location: Morrison, Colorado
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 Posted: Tue Feb 11, 2014 9:57 am Post subject: |
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| kalispell365 wrote: |
everywhere I look contradicts fast forward, stating the following:
The following is from an Aussie conversion website
"Subaru uses a 4 pulse @ 5V per wheel rev VSS, so does mine.
The difference in rolling circumference is approx 5% between Impreza and VW bus.
*shrugs* better to be under reading as it switches the fan in earlier as opposed to later. "
something is not right,as smallcar also uses 5 pulse,and that is MUCH closer per revolution on a 2wd than 8 pulse.
still looking for someone on here with additional knowledge. |
I double checked and the FastForward 8pls product description and it has a caveat in it. It says:
| FastForward wrote: |
| "Compatible with the Volkswagen Vanagon 2WD with the number 500 written on the bottom of the speedometer or 840 if you have a MPH speedometer." |
Mine has 805. 
I've reached out to him for more info on this, but I guess if FF is the one, it would be the 4 pls now!??
_________________
'83.5 Westfalia Camper - SOLD
'86 Westfalia Weekender
2001 Subaru Legacy 2.5L donor
Rocky Mountain Westy kit |
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coclimber
Samba Member
Joined: July 18, 2013
Posts: 245
Location: Morrison, Colorado
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| Posted: Tue Feb 11, 2014 10:14 am Post subject: |
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Just a follow-up, David at FastForward confirmed even with the #805 on my speedometer, given my Subaru/Vanagon setup, the 8 pls is the VSS product to get. It will not be 100% given my larger 16" tires, etc. but the signal will be close enough for the ECU to be happy and cruise control to set.
_________________
'83.5 Westfalia Camper - SOLD
'86 Westfalia Weekender
2001 Subaru Legacy 2.5L donor
Rocky Mountain Westy kit |
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kalispell365
Samba Member
Joined: April 01, 2010
Posts: 889
Location: PNW
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| Posted: Tue Feb 11, 2014 10:23 am Post subject: |
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I very much wish gowesty would provide some more information.
heres some more info,specifically for 95 and newer obd2.
The FSM for 95 says this about the P0500 code.
AG: DTC P0500
— VEHICLE SPEED SENSOR MALFUNCTION
(VSP) —
DESCRIPTION:
The speedometer system is an electric type; it uses no
speedometer cable and drives the speedometer according
to electric pick-up sensor (vehicle speed sensor 2).
The speed sensor 2 is installed on the transmission. The
speed sensor 2 sends the vehicle speed signal (8 pulses
per one turn of speed sensor driven shaft) to the speed
detection circuit in the speedometer where this signal pulse
wave is regulated.
The regulated pulse signal (4 pulses per one turn of speed
sensor driven shaft) is sent to the speedometer drive circuit
and odometer (trip meter) drive circuit.
The output signal from vehicle speed detection circuit is
also used in ECM, TCM, etc.
ALSO:
The input signal from the speed sensor to the instrument cluster is an 8 pulse per second AC voltage signal. The output signal from there to the ECM is 4 pulse per second DC voltage of 5V.
the difference between fast forward and other information may be because of the apparent difference between the obd1 and obd2 factory setup in the original Subaru...
the old obd1 90-94 legacy receives the pulse directly from a 4 pulse magnet setup at the speedometer head/cable area,very similar to what we all are trying to achieve.
Last edited by kalispell365 on Tue Feb 25, 2014 3:27 pm; edited 1 time in total |
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kalispell365
Samba Member
Joined: April 01, 2010
Posts: 889
Location: PNW
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| Posted: Tue Feb 25, 2014 8:45 am Post subject: |
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So...
Another detail.The Gowesty VSS will NOT fit in the pre 1986 speedometer head,even with the cutout in the rear,the plastic is a different shape and it will not clear.The last photo is the later style speedometer,notice the difference.BOTH are clip style speedometer cable setups.
Last edited by kalispell365 on Tue Feb 25, 2014 2:22 pm; edited 1 time in total |
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coclimber
Samba Member
Joined: July 18, 2013
Posts: 245
Location: Morrison, Colorado
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| Posted: Tue Feb 25, 2014 9:05 am Post subject: |
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| kalispell365 wrote: |
So...
Another detail.The Gowesty VSS will NOT fit in the pre 1986 speedometer head |
Good point. But, GoWesty says this on their VSS product page:
"*If your speedometer has a screw-on speedometer cable, you DO NOT have a provision for the VSS (vehicle speed sensor). You will need to purchase one of our rebuilt speedometer units and a snap-in cable, sold separately below."
I miss fine print all the time too. 
_________________
'83.5 Westfalia Camper - SOLD
'86 Westfalia Weekender
2001 Subaru Legacy 2.5L donor
Rocky Mountain Westy kit |
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insyncro
Banned
Joined: March 07, 2002
Posts: 15086
Location: New York
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| Posted: Tue Feb 25, 2014 9:19 am Post subject: |
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Reading all of the GW description and highlighted in red sections will save you time and money.
Many issues experienced and posted to the Samba become GW disclaimers  |
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Altoona
Samba Member
Joined: November 14, 2011
Posts: 504
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| Posted: Tue Feb 25, 2014 9:24 am Post subject: |
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| kalispell365 wrote: |
So...
Another detail.The Gowesty VSS will NOT fit in the pre 1986 speedometer head,even with the cutout in the rear,the plastic is a different shape and it will not clear. |
It works, you just have to trim the plastic a bit so it sits down flush. |
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furrylittleotter
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Joined: May 19, 2008
Posts: 1506
Location: West Seattle
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| Posted: Tue Feb 25, 2014 9:30 am Post subject: |
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If what a previous poster said is true and the Gowesty VSS emits AC and the ecu wants dc a simple diode can be used to "clip" the negative end of the AC sine wave. if the voltage emitted is too high two resistors can be placed in series and the voltage taken off one of the resistors in parallel. the voltage drop across the resistor will be the output voltage.
I am VERY rusty on electronics but this is very basic stuff a few guys on here should be able to chime in and show you how to make the signal out of the Gowesty work for your ecu if, in fact, it is ac not dc and too high of a voltage.
If the signal is ENTIRELY wrong a very simple transistor circuit can be built to take the vss output as a signal and entirely change the signal to what you want it to be…kind of like a relay works.
And some people simply use a 555 timer circuit to supply constant pulses to fool the ecu vss input (as well as other inputs the ecu sometimes looks for)
Personally I use the small car setup with an aftermarket hall effect device. it works fine for me for now.
GPS might also be an easy option. intellitronix gps speedo senders are available, that could be wired into a sweet VDO speedo like mine if you wanted.
Neil2 |
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insyncro
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Joined: March 07, 2002
Posts: 15086
Location: New York
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| Posted: Tue Feb 25, 2014 9:33 am Post subject: |
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David Marshall's and RJES's VSS wares are topnotch.
I have not used or plan to experiment with the GW unit.
It is just Dan Flemmings part available at retail. |
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kalispell365
Samba Member
Joined: April 01, 2010
Posts: 889
Location: PNW
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| Posted: Tue Feb 25, 2014 2:13 pm Post subject: |
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| coclimber wrote: |
| kalispell365 wrote: |
So...
Another detail.The Gowesty VSS will NOT fit in the pre 1986 speedometer head |
Good point. But, GoWesty says this on their VSS product page:
"*If your speedometer has a screw-on speedometer cable, you DO NOT have a provision for the VSS (vehicle speed sensor). You will need to purchase one of our rebuilt speedometer units and a snap-in cable, sold separately below."
I miss fine print all the time too. |
If you look at my speedometer it is the clip on cable,I do not have a screw on cable  |
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kalispell365
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Joined: April 01, 2010
Posts: 889
Location: PNW
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| Posted: Tue Feb 25, 2014 2:21 pm Post subject: |
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| insyncro wrote: |
Reading all of the GW description and highlighted in red sections will save you time and money.
Many issues experienced and posted to the Samba become GW disclaimers |
I read the fine print VERY careful.
After bringing up the problem to them, their solution was to start hacking up the back of the long NLA speedometer backing.
No thanks. |
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yiucycle
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Joined: August 22, 2007
Posts: 421
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| Posted: Tue Feb 25, 2014 2:27 pm Post subject: |
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you can probably hack up the GW connect piece if you dont want to open up a bit on your speedo back cover.
Is the the 1980 a screw in speedo cable?
_________________
1980 2.8LV6 Fiero ASI/Riviera Vanagon
"there is no point in being embarrassed of all the stupid shit i done and will continue to do"
Stop dead photo links! Post your photos to The Samba Gallery! |
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kalispell365
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Joined: April 01, 2010
Posts: 889
Location: PNW
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| Posted: Tue Feb 25, 2014 2:30 pm Post subject: |
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You cannot cut the GW piece,the wiring exits directly where you would have to cut it...
The 1980 speedometer is a screw on connector.
Last edited by kalispell365 on Tue Feb 25, 2014 3:37 pm; edited 1 time in total |
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coclimber
Samba Member
Joined: July 18, 2013
Posts: 245
Location: Morrison, Colorado
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| Posted: Tue Feb 25, 2014 2:35 pm Post subject: |
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| kalispell365 wrote: |
I read the fine print VERY careful.
After bringing up the problem to them, their solution was to start hacking up the back of the long NLA speedometer backing.
No thanks. |
Bummer. RMA that thing man!
_________________
'83.5 Westfalia Camper - SOLD
'86 Westfalia Weekender
2001 Subaru Legacy 2.5L donor
Rocky Mountain Westy kit |
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kalispell365
Samba Member
Joined: April 01, 2010
Posts: 889
Location: PNW
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| Posted: Tue Feb 25, 2014 2:46 pm Post subject: |
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| kalispell365 wrote: |
| Syncro Jael wrote: |
I purchased one and installed it with my EJ22 1994 Subaru.
The ECU does not recognize the signal on mine so I still get a check engine light when decelerating. But it promptly goes off when you push in the clutch and let it idle for a few seconds.
Freakin drives me CRAZY!  |
I think there are two different vss pulse rates,as the syncro speedometer spins at a different rate.there is a company in Canada called fast forward which offers two different spreed sensors,one for the 2wd and one for the syncro.i wish I understood what the actual difference in the sensor itself is.
heres a link:
http://www.fastforward.ca/harness_retrofit_accessories.html
I am about to install a gw vss in my 2wd Subaru 2.2 but unfortunately wont be able to drive until spring... |
This one David at Fast Forward says will fit without any modification,also I contacted RJES,and theirs will also fit without hacking.They both knew about the difference in the speedometer backing as well.
I will be purchasing from Fast Forward,looks like a super nice quality piece. |
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coclimber
Samba Member
Joined: July 18, 2013
Posts: 245
Location: Morrison, Colorado
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| Posted: Tue Feb 25, 2014 3:03 pm Post subject: |
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| kalispell365 wrote: |
This one David at Fast Forward says will fit without any modification,also I contacted RJES,and theirs will also fit without hacking.They both knew about the difference in the speedometer backing as well.
I will be purchasing from Fast Forward,looks like a super nice quality piece. |
You came full circle from your Feb. 11th post... 
I just got my FastForward VSS in the mail this weekend. Got the 8 pls. Psyched to get it plugged in, but not there yet in my conversion effort. It will be a few more weeks til its all hooked up.
_________________
'83.5 Westfalia Camper - SOLD
'86 Westfalia Weekender
2001 Subaru Legacy 2.5L donor
Rocky Mountain Westy kit |
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kalispell365
Samba Member
Joined: April 01, 2010
Posts: 889
Location: PNW
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| Posted: Tue Feb 25, 2014 3:30 pm Post subject: |
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| coclimber wrote: |
| kalispell365 wrote: |
This one David at Fast Forward says will fit without any modification,also I contacted RJES,and theirs will also fit without hacking.They both knew about the difference in the speedometer backing as well.
I will be purchasing from Fast Forward,looks like a super nice quality piece. |
You came full circle from your Feb. 11th post...
I just got my FastForward VSS in the mail this weekend. Got the 8 pls. Psyched to get it plugged in, but not there yet in my conversion effort. It will be a few more weeks til its all hooked up. |
I did,mostly due to the fact of the knowledge from David, as well as the obvious difference between the quality and fitment.Im all about the learning and this experience has been nothing but just that! |
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syncrodoka
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Joined: December 27, 2005
Posts: 12005
Location: Santa Cruz, CA
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| Posted: Wed Feb 26, 2014 7:45 pm Post subject: |
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According to the manufacturer's website of the unit FastForward sells it is 5v. DC square wave output. The manufacturer's website lists more details about the unit and it sounds even better, I do like how the wiring unplugs from the unit so that the instrument cluster can still come out easily. http://www.speedpuls.de.ki/
I am interested in hearing some feedback on the unit, either positive or negative. |
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kalispell365
Samba Member
Joined: April 01, 2010
Posts: 889
Location: PNW
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| Posted: Wed Feb 26, 2014 10:07 pm Post subject: |
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I will for sure report on the VSS,I also like the unplug option as well.
Syncrodoka,I believe you have been of assistance to me in the past,I will be more than happy to provide any information you may want after I install. |
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