Electronic Speedo sender, My solution |
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Electronic Speedo sender, My solution |
Wasa914 |
Oct 20 2003, 11:49 PM
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#1
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Newbie Group: Members Posts: 13 Joined: 8-October 03 From: Ukiah,CA Member No.: 1,229 |
I'm a newbie to contribute but I have received a bunch of information from this board in the past which I am very grateful. Just wanted to share what I learned.
I am using a VDO electronic speedometer and have seen alot of innovative ways to send the electronic signal via the 901 trans. My solution is to cut off the slotted key end of the speedometer cable that fits the angled trans cable driver. Drilled out the cable hole and sodder in a shortened square key drive that is in the standard GM VDO sender. I had a machinist do this and make a bushing that will center the slotted cable end in the GM sender. The GM sender has a threaded nut that will fit the 901 angled cable driver which is amazing because I thought it wasn't meteric. Hopefully this picture will appear. (IMG:http://www.914world.com/bbs2/uploads/post-2-1066763782.jpg) Philip '73 914 still in transformation |
914Timo |
Oct 21 2003, 12:18 AM
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#2
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******* Group: Members Posts: 743 Joined: 13-January 03 From: Finland Member No.: 137 Region Association: Europe |
Great info. Many thanks.
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kafermeister |
Oct 21 2003, 05:40 AM
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#3
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Senior Member Group: Members Posts: 778 Joined: 20-January 03 From: Cincinnati/Northern KY Member No.: 174 |
Did you make the adapter piece in the middle?
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JFJ914 |
Oct 21 2003, 09:59 AM
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#4
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Senior Member Group: Benefactors Posts: 813 Joined: 13-June 03 From: Alpharetta, GA Member No.: 814 Region Association: South East States |
What happened to the picture? All I get is an X.
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Wasa914 |
Oct 21 2003, 10:15 AM
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#5
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Newbie Group: Members Posts: 13 Joined: 8-October 03 From: Ukiah,CA Member No.: 1,229 |
Sorry about the picture. This digital thing is new to me. I'll try to reformat it.
The middle piece is the end of the speedometer cable attached to the square key that comes with the GM sender. Philip |
Wasa914 |
Oct 21 2003, 12:57 PM
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#6
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Newbie Group: Members Posts: 13 Joined: 8-October 03 From: Ukiah,CA Member No.: 1,229 |
This is my try at reformatting the picture.
\ Philip |
Wasa914 |
Oct 21 2003, 12:58 PM
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#7
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Newbie Group: Members Posts: 13 Joined: 8-October 03 From: Ukiah,CA Member No.: 1,229 |
I'll have to start a new topic and post it.
Philip |
seanery |
Oct 21 2003, 01:16 PM
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#8
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waiting to rebuild whitey! Group: Retired Admin Posts: 15,854 Joined: 7-January 03 From: Indy Member No.: 100 Region Association: None |
here it is.
Attached image(s) |
SirAndy |
Oct 21 2003, 01:27 PM
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#9
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Resident German Group: Admin Posts: 41,839 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
that's schweet! (IMG:style_emoticons/default/wub.gif)
i already have the elec. speedo (actually my 944 speedo is both!), that seems like a good/easy solution. how do i adjust a elec. speedo for different tire sizes? Andy |
ss6 |
Oct 21 2003, 02:35 PM
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#10
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fun city... Group: Members Posts: 261 Joined: 2-February 03 From: Western Connecticut Member No.: 221 |
Search the Pelican 911 board for "speedo" and / or "calibration", plenty of how-to's there.
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Rusty |
Oct 21 2003, 02:38 PM
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#11
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Wanted: Engine case GA003709 Group: Admin Posts: 7,952 Joined: 24-December 02 From: North Alabama Member No.: 6 Region Association: Galt's Gulch |
Is the signal for an electronic speedo sent via wire or some type of wireless comm?
If it's wire - what's the overall benefit for our cars? After all, we still have an ugly cable beneath, just waiting to be cut by debris, burnt by exhaust, etc. Curious, -Rusty (IMG:style_emoticons/default/smoke.gif) |
SirAndy |
Oct 21 2003, 02:55 PM
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#12
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Resident German Group: Admin Posts: 41,839 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(Lawrence @ Oct 21 2003, 01:38 PM) If it's wire - what's the overall benefit for our cars? After all, we still have an ugly cable beneath, just waiting to be cut by debris, burnt by exhaust, etc. less rotating mass (IMG:style_emoticons/default/laugh.gif) |
sleepdoc |
Oct 21 2003, 04:12 PM
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#13
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Newbie Group: Benefactors Posts: 24 Joined: 15-June 03 From: Pupakea, Oahu, HI Member No.: 826 |
Hi nice tinker!
Please tell us a bit more about the centering bushing. A pic would be great. And do I understand correctly that the smaller square drive key part came with the sender part? thanks Mark |
sleepdoc |
Oct 21 2003, 04:22 PM
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#14
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Newbie Group: Benefactors Posts: 24 Joined: 15-June 03 From: Pupakea, Oahu, HI Member No.: 826 |
Hi,
One more question. The GM sender is a 16 pulse per revolution. This recent post http://www.914world.com/bbs2/index.php?act...=5400&hl=speedo suggests that the 911 VDO speedo wants 8 pulses. Are you using a programable speedo? or is this setup working with a 911 speedo correctly? thanks Mark |
Wasa914 |
Oct 21 2003, 11:31 PM
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#15
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Newbie Group: Members Posts: 13 Joined: 8-October 03 From: Ukiah,CA Member No.: 1,229 |
The bushing is a hard plastic. It not only centers the slotted key, it also seals between the sender and angled cable drive. The small square key came with the sender and was almost cut in half, then solder to the cable end. The long axis play is not limited, there is 2 to 3 mm of play. I will try to enclose a picture.
Attached image(s) |
Wasa914 |
Oct 21 2003, 11:47 PM
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#16
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Newbie Group: Members Posts: 13 Joined: 8-October 03 From: Ukiah,CA Member No.: 1,229 |
I forgot. The sender is for a programable VDO speedometer and not for a 911. Hopefully this is a better picture.
Attached image(s) |
sechszylinder |
Oct 22 2003, 02:01 AM
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#17
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Member Group: Members Posts: 256 Joined: 9-April 03 From: /earth/europe/germany/berlin Member No.: 545 Region Association: None |
hi Philip,
this is a great setup, but I have a question concerning the sender: Is this part made by VDO or GM ? (IMG:style_emoticons/default/confused24.gif) Benno |
Wasa914 |
Oct 22 2003, 07:58 AM
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#18
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Newbie Group: Members Posts: 13 Joined: 8-October 03 From: Ukiah,CA Member No.: 1,229 |
Benno,
The sender is made by VDO and made to fit all GM trans. In the first posted picture, the blue box has the part number on it. Philip |
914Timo |
Oct 29 2003, 02:37 AM
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#19
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******* Group: Members Posts: 743 Joined: 13-January 03 From: Finland Member No.: 137 Region Association: Europe |
Nobody seem to answer to the sleepdoc´s question. If this GM sender gives 16 pulse per revolution, but
the 911 VDO speedo needs only 8 pulses per revolution, doesnt the speedo show double the speed ?? Could somebody confirm this sender really works with 911 speedo ?? I mean, is there anybody who have this combo in his/her car ??? I just would like to know this for sure before I go and by one. |
sechszylinder |
Oct 29 2003, 02:50 AM
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#20
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Member Group: Members Posts: 256 Joined: 9-April 03 From: /earth/europe/germany/berlin Member No.: 545 Region Association: None |
hi timo,
I guess that it will double the readout, if you double the pulse count. Philip is using the programmable VDO speedo which needs 16 pulse per revolution. To half the pulse rate is pretty easy using a small electronic circuit. benno |
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