Mechanical speedo
If you're going to put it behind an LS1, the PCM needs the VSS signal to function properly. So some searching on VSS to find a few threads that talk about why the computer needs to know if you're moving.
If this isn't the case, D&D Performance (http://www.ddperformance.com/) might be a good place to start. I don't know where you are, but they're local to me in the Detroit area.
-Matt
If this isn't the case, D&D Performance (http://www.ddperformance.com/) might be a good place to start. I don't know where you are, but they're local to me in the Detroit area.
-Matt
FormerVendor
Joined: Feb 2002
Posts: 430
Likes: 0
From: Falkner, MS
Another alternative is to use one of our Speedometer Control Units (SCU). The part number is 377300. It translates the electrical signal into a mechanical output. You'll also need a cable. Part number 377301 fits the '71 and older threaded style speedo. Part number 377302 fits the later model clip on speedo.
Kevin Winstead
TCI Automotive
(662)224-8972
Kevin Winstead
TCI Automotive
(662)224-8972
I'm using an Abbott Cable-X converter box which takes the VSS signal from the trans and converts it to a mechanical cable drive. Haven't installed it yet but have heard positive feedback about it.
Kevin,
What is the cost of your unit? I have no speedo in my car because I couldn't justify the cost of the Cable-X. I'm sure there are people out there looking for a lower-cost solution.
Thanks,
Matt
What is the cost of your unit? I have no speedo in my car because I couldn't justify the cost of the Cable-X. I'm sure there are people out there looking for a lower-cost solution.
Thanks,
Matt
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Launching!
Joined: Jul 2004
Posts: 223
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From: Potomac, MD
There is a company www.stealthconversions.com who converts T56 tail housing to mechanical and VSS. They have the conversion for LT1, but not LS1. Would there be any differences w/ the signal?
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Verdad Gallardo In my case the Cable-X was the cheaper option. At the time, a modified tailshaft cost more. The other factor is that I wanted an Autometer 200mph speedo with a standard odometer and it was only available as a mechanical gauge.
Launching!
Joined: Oct 2004
Posts: 238
Likes: 1
Speedometer I'm in the planning stage right now but as soon as my conversion is complete I plan on making my own electrical to mechanical converter using a few ICs and a stepper motor. Shouldn't cost more than twenty bucs. When I get it made and tested I'll post a schematic.
