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03-06-2012, 12:05 AM
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#1 |
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Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,118
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67-72 Electric speedo
This is my 120mph electric speedo mod for 67-72 trucks. I got the idea from another member on here, brad_man_72, when I saw his truck at the All Truck Nationals several years ago. He had it in his truck, but it wasn't working. I took the ball and ran with it.
What it is, is the guts from a '96-7 S-10. They made two speedos in those trucks, one with a tach and one without. You need the one without the tach. The S-10 speedo goes from 0 to 100mph, but the numbers start at what would be the 8 o'clock position and go to the 4 o'clock position. 67-72 trucks, the 0mph is at the 7 o'clock position and goes to the 5 o'clock position, so for it to work right and to have the exact same sweep, the needle needed to be put on in the 7 o'clock position, but what that does is put the 100mph mark at 3 o'clock, so I added 110 and 120 to even everything out. I had a new face made up that has the correct lines on it, one for every 10 mph, and then had a "mask" made to be able to repaint on the numbers on the lens. Mounting the guts behind the original face is probably the hardest part. Actually using the original face didn't work out as well as just using the S-10 face and putting the new face I had made right on top of it. Once I put the new face on, I cut out the odometer and trip odometer holes. I had to move a couple of the dash light bulbs, and I did away with the printed circut and just hard wired them with a plug so I can unplug the whole cluster to remove it. I also put a small red LED in the factory spot for the high beam indicator. You wouldn't need to keep the trip odometerm but I figured since it was there I would try and keep it. It is just barely noticeable, but the reset knob is just to the right of the speedo in the bezel. The pics here are of it when I was working on it, it's not done in the pics and I have since had the lines on the face changed to more of a greenish tint to match the other gauges because the first ones looked too white next to them. I have tested this speedo by hooking it up to my 2003 Sunfire, and it was right on with what the sunfire speedo read, so I know it's going to work when I get my truck on the road.
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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 Last edited by ls1nova71; 03-06-2012 at 12:44 AM. |
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03-06-2012, 12:11 AM
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#2 |
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A guy with a truck
Join Date: Sep 2005
Location: Germany, for now
Posts: 5,921
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Re: 67-72 Electric speedo
Very nice! Can you go into more detail about where you got the printing done?
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-Chris Instagram _elgringoloco_ '70 Short-Wide How to: Ruin a perfectly good C10 ‘70 Blazer ConversionHow To: Ruin a Perfectly Good 4wd '72 Highlander How To: Ruin a Perfectly Good K/5 (SOLD) '72 Blazer 2WD How to: Ruin a perfectly good Blazer (SOLD) '05 Yukon Daily Driven (not so stock) Yukon (SOLD) ‘07 Yukon Denali (daily) Members met list: SCOTI, darkhorse970, 67cheby, 67cheby'sGirl, klmore, porterbuilt, n2billet, Fastrucken, classicchev, Col Clank, GSFMECH, HuggerCST, Spray-Bomb, BACKYARD88, 5150, fine69, fatbass, smbrouss70, 65StreetCruiser, GAc10boy |
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03-06-2012, 12:13 AM
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#3 |
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Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,118
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Re: 67-72 Electric speedo
more pics
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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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03-06-2012, 12:20 AM
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#4 |
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Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,118
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Re: 67-72 Electric speedo
more
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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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03-06-2012, 12:27 AM
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#5 |
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Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,118
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Re: 67-72 Electric speedo
more
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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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03-06-2012, 12:34 AM
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#6 |
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Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,118
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Re: 67-72 Electric speedo
and more
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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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03-06-2012, 12:39 AM
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#7 |
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Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,118
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Re: 67-72 Electric speedo
more
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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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03-06-2012, 12:42 AM
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#8 | |
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Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,118
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Re: 67-72 Electric speedo
Quote:
__________________
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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03-06-2012, 09:33 AM
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#9 |
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Registered User
Join Date: Sep 2005
Location: sc
Posts: 1,203
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Re: 67-72 Electric speedo
Very cool!
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71 Cheyenne C10 LWB cam'd 6.0/T56 Swap |
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03-06-2012, 10:34 AM
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#10 |
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1965 Chevy C10, 2005 4.8L/4l60
 
Join Date: Aug 2004
Location: DFW Texas
Posts: 8,545
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Re: 67-72 Electric speedo
Genius!
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Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684  support our troops! |
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03-06-2012, 01:02 PM
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#11 |
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Registered User
Join Date: Jun 2007
Location: East TN
Posts: 42
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Re: 67-72 Electric speedo
That is great work man!
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03-14-2012, 10:25 PM
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#12 |
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Registered User
Join Date: Dec 2006
Location: Braselton, GA
Posts: 245
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Re: 67-72 Electric speedo
Excellent work. I am going to do this.
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03-15-2012, 08:54 AM
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#13 |
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Registered User
Join Date: Jan 2010
Location: Wataga,IL
Posts: 666
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Re: 67-72 Electric speedo
one of the coolest ideas and execution i've seen in awhile
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66 LWB/BBW work in progress 68 Camaro SS bigger work in progress 95 Roadmaster Wagon 12.36 @ 107.74 99 Hayabusa 8.72 @ 162 00 Hayabusa 9.33 @ 153 |
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05-04-2012, 09:45 PM
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#14 |
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Registered User
Join Date: Jan 2012
Location: Petal,Ms.
Posts: 428
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Re: 67-72 Electric speedo
Great job, I love these diy jobs, make it work.
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08-29-2012, 11:41 PM
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#15 |
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Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,118
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Re: 67-72 Electric speedo
Thought I'd post a quick update. I had the tune in my truck finalized yesterday, and now the speedo is dead on the money! I drove the truck to my buddy's house in Topeka, and when he was done with it, driving it home, the speedo was within 1 mph of what my GPS was saying. I clocked the odometer by the mile markers on the turnpike, and with every 1 mile on the odometer was 1 mile exactly with the markers. And the needle is SMOOTH! Not at all jumpy like the original speedo, or with a Cable-X.
I'm putting together another one for my beater truck (avatar pic) that's getting a 5.3 4l60e swap real soon!
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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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08-29-2012, 11:46 PM
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#16 | |
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Registered User
Join Date: Dec 2010
Location: NC
Posts: 666
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Re: 67-72 Electric speedo
Quote:
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08-30-2012, 01:22 AM
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#17 |
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C10 Club Tennessee
Join Date: Mar 2003
Location: White House, TN 37188
Posts: 8,281
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Re: 67-72 Electric speedo
I'm not ashamed to be that guy, any interest in making more of these? I have a 5.3 4L60E going in my burb.
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Bryan www.gmtruckshow.com Project "Andes"-Halen's First Truck Project: Patina Burb for he is God’s servant for your good. But if you do wrong, be afraid, for he does not bear the sword in vain. For he is the servant of God, an avenger who carries out God’s wrath on the wrongdoer. Romans 13:4 |
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12-20-2012, 01:37 AM
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#18 |
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Second Chance Program
Join Date: Jun 2006
Location: Portland, OR
Posts: 2,642
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Re: 67-72 Electric speedo
Found this from your thread on ls1tech. Incredible work!
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90 Chevy Suburban 2500 5.3 swap/th400/np241/14bltSF/10blt. 77 C20 crew cab Silverado. 396/th400. In work. |
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12-20-2012, 02:48 AM
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#19 |
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Moderator
 
Join Date: Jul 2006
Location: Ozark, MO
Posts: 4,888
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Re: 67-72 Electric speedo
You should see the next one he built...
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'20 Silverado Trail Boss ~ '17 Tahoe ~ '79 K15 Sierra Grande ~ '76 Blazer 2wd ~ '71 Cheyenne swb ~ '55 Pontiac Safari ~'50 3100 bagged ~ '80 Wife ~ Late model kids
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12-20-2012, 01:44 PM
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#20 | |
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Registered User
Join Date: Dec 2010
Location: NC
Posts: 666
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Re: 67-72 Electric speedo
Quote:
Posted via Mobile Device |
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12-20-2012, 03:29 PM
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#21 |
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Moderator
Join Date: Jul 2006
Location: Ozark, MO
Posts: 4,888
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Re: 67-72 Electric speedo
Gotta see it in real life, I think. At the speed he builds, I'm not sure Eric has time to mess with all the pictures and posting. Imagine the blue one only orange and white and badder-asser.
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'20 Silverado Trail Boss ~ '17 Tahoe ~ '79 K15 Sierra Grande ~ '76 Blazer 2wd ~ '71 Cheyenne swb ~ '55 Pontiac Safari ~'50 3100 bagged ~ '80 Wife ~ Late model kids
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12-20-2012, 09:35 PM
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#22 | ||||
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Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,118
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Re: 67-72 Electric speedo
Quote:
Quote:
Quote:
Quote:
__________________
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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12-20-2012, 09:58 PM
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#23 |
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Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,118
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Re: 67-72 Electric speedo
For anyone thinking about doing this, I thought I would update the pics a little bit. These are the pics of the finished cluster, the backside showing it all hard wired with no printed circut, and you can also see the plugs I put on it so I can unplug the whole cluster to remove it. The last pics are of the back tin where the speedo mounts. This is on the one I am currently working on and I changed how it's mounted, works out better this way.
__________________
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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12-20-2012, 09:59 PM
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#24 |
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Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,118
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Re: 67-72 Electric speedo
The back tin.
 
__________________
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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12-21-2012, 06:34 AM
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#25 |
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Registered User
Join Date: Jul 2009
Location: Russellville, Arkansas
Posts: 1,699
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Re: 67-72 Electric speedo
Nice work. PM sent.
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