Electronic Speedo Conversion PIC HEAVY!!!!!!!

Built6spdMCSS

Geezer
Jun 15, 2012
5,839
9,776
113
Florida Beach
You are correct, the odometer is actually off in mine, I watched it on a long trip and figured out how to calculate it. I can see the arduino working no problems and that's a cheap fix for that, to me I just leave it be. The work alone just to make the speedo work with the proper needle for the visual is good for me lol.
 

Built6spdMCSS

Geezer
Jun 15, 2012
5,839
9,776
113
Florida Beach
For anyone running factory EFI Engines like the LT1 & LS stuff, here is how to get all the gauges to work:

Fuel gauge and Volt gauge are in the car wiring and works.
Oil pressure: hook up the Sending Unit from the Engine to the wire for the gauge in the cluster.

Tach: wire PCM Red/Green Pin 10 in the LS Engine Harness to the Tach in the Cluster, set the pulse correctly in the tune. For the LT1 look it up in the link below.

Water Temp: need 1998 LS 3-wire Temp Sensor GM Part # 12551708, wire Pin C to the Temp gauge in the cluster. For the LT1 just wire the single green wire on the harness Temp Sensor connector to the gauge.

Speedometer: if using an electronic transmission, convert the speedo gauge in the cluster to electronic. Wire the VSS from Red/Green Pin 50 in the LS Engine Harness, can be calibrated correctly in the tune. For the LT1 look it up in the link below.

LT1 WIRING INFO: http://www.lt1swap.com/all_lt1.htm
 
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javi492

n00b
May 29, 2018
1
0
1
hello, sorry to bring up an old thread but i'm doing my first ls swap and i've been reading and doing all kinds of things to get my monte running. i found all the pieces to make my cluster just like this but i have a dumb question. the wire you solder to the speedo, where did you get/what was it from. thanks
 

87AeroTtop

Not-quite-so-new-guy
Sep 6, 2018
5
0
1
Lisle, IL
Hi I have been looking this thread up and down wanting to do this conversation. Love the original interior look. What I can't find is what the donor speedo looks like. I have bought one on Ebay and need to know that this one I got is right. Should have a pic attached.
 

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87National

G-Body Guru
Apr 15, 2009
663
690
93
eastern SD
Hi I have been looking this thread up and down wanting to do this conversation. Love the original interior look. What I can't find is what the donor speedo looks like. I have bought one on Ebay and need to know that this one I got is right. Should have a pic attached.
Can you post a picture of the back of the speedometer? That looks a lot like a mechanical speedometer. I've pulled a couple of these......mine have a single indicator light for brights.....resolution to the nearest mpg........and the face has the word "Quartz" on it.
 

87AeroTtop

Not-quite-so-new-guy
Sep 6, 2018
5
0
1
Lisle, IL
Can you post a picture of the back of the speedometer? That looks a lot like a mechanical speedometer. I've pulled a couple of these......mine have a single indicator light for brights.....resolution to the nearest mpg........and the face has the word "Quartz" on it.
 

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MC96

Master Mechanic
Dec 7, 2015
458
494
63
couple of questions?
is the blazer speedometer also 120 mph? is there any kind of calibration needed to be done to the speedometer?

what years blazer/truck/sub have the electronic speedo (i would assume just those equiped 4l60e)?

any other vehicles have a similar speedometer that would work? fbody, caprice, etc...?


It would have been a non "e" then known as a 700r4
 

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