11-19-2015, 12:22 PM | #1 |
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Electric 66 speedo
Looking for info on converting my 66 factory speedo (cable driven) to a newer electric unit for my 4l80. I want it to look original. I have found info on 68-72
but not on 64-66 thanks |
11-19-2015, 07:53 PM | #2 |
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Re: Electric 66 speedo
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11-19-2015, 08:44 PM | #3 |
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Re: Electric 66 speedo
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Tony Nicholas @ Midwest Metal Masters 1953 Chevy 3100 392 Hemi w/727 & 9” Ford 1985 Chevy C/10 6.0L 4L80 373 locker |
11-19-2015, 09:23 PM | #4 |
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Re: Electric 66 speedo
Your best bet is going to be trying to use the guts out of a Caprice speedo from around 95 or so. They are the only long sweeping electric speedos that I have found. At some point I'm going to try and make one work in my Nova and since its similar, I would thonk the trucks could be done too. It's mostly just trial and error to figure out everything. Good luck with it and if you try it, keep us posted on your progress.
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My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html |
11-19-2015, 10:00 PM | #5 | |
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Re: Electric 66 speedo
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11-19-2015, 11:44 PM | #6 |
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Re: Electric 66 speedo
Ok, did a little Googling, and it's a '91-'93 Caprice. Looks very close, but the truck is 100mph where as the Caprice is 80, but might be close enough to work by moving the needle down a bit since it looks like the truck has a little bit more sweep to it. Then you would just have to move the odometer, which should be doable since electric ones aren't built into the speedo like the cable driven ones are.
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My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html |
11-20-2015, 09:21 AM | #7 |
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Re: Electric 66 speedo
Ill be doing this same thing here shortly, plan to use abbott x conversion box to retain my factory gauges. pricey but ive yet to find any other options.
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1965 C10 LS2/4l70, WHITE, 5/7 DROP LINK TO SUPER SNOOPY C10 BUILD---> http://67-72chevytrucks.com/vboard/s...d.php?t=689283 1977 C10 SILVERADO HAWAIIAN BLUE, 5/5" DROP, LS6/4L80E 1976 CHEVY K5, 350/350, YUBA GOLD/SADDLE |
11-21-2015, 10:42 AM | #8 | |
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Re: Electric 66 speedo
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11-21-2015, 03:54 PM | #9 | ||
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Re: Electric 66 speedo
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My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html |
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11-21-2015, 05:52 PM | #10 | |
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Re: Electric 66 speedo
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11-23-2015, 11:51 AM | #11 |
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Re: Electric 66 speedo
The wire would come from the ECM for the speedo, but requires some additional tuning to make it work. I have only done it once, and that was on an LS3. I put the wire in, had it tuned and then the guy who owned the truck thought it would be easier to buy a GPS speedo, so I never did get to see it work. You might get hold of Hart_Rod, I'm pretty sure he has his working. That said, I've never used that trans controller so I'm not familiar with it, but I would think you would have to hook up both input and output speed sensors to it. I assume it connects to the ECM somehow?
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My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html |
11-23-2015, 12:44 PM | #12 |
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Re: Electric 66 speedo
Connector 1 of the E38 pin 57 is the speed output. In a factory harness, I believe it is yellow with a black stripe (in the truck application). It's the output for the ABS system and is 128K pulses per mile. If you're using a car OS and harness the pin is not used, but you can turn it on in the tune and add the wire to pin 57 and it will be 4K pulses per mile. Unless this has changed in the last year or so, the pulses per mile is not configurable for the e38 in HP Tuners even though it appears that it is (i.e. changing the output pulses has no effect on the actual signal)
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11-24-2015, 09:43 PM | #13 | |
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Re: Electric 66 speedo
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11-24-2015, 10:06 PM | #14 |
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Re: Electric 66 speedo
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11-24-2015, 10:25 PM | #15 |
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Re: Electric 66 speedo
Thanks for info
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11-27-2015, 03:14 PM | #16 |
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Re: Electric 66 speedo
Has anyone seen the new release for Dakota Digital electric speedo drive for cable. Watch video on YouTube search Dakota digital.
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