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Wiring in aftermarket Speedometer

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Old 03-17-12, 06:55 PM
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Wiring in aftermarket Speedometer

I am looking to wire in a dash mounted prosport speedometer. Before you go off on why doesn't my stock one work it's because my steering wheel gets in the way of 45-70mph. Now that we've kept the trolls at bay, I would like to ask "how do you wire this?".

Has anyone wired in aftermarket gauges and the speedometer specifically? I want to be able to do this myself so I don't have to pay an arm and a leg. I have done all my stereo wiring, fuel cut off switch, and my slimline e-fans for my koyorad. I am confident that if I could get some direction on this that it would be a project I could tackle. I have no idea how to read electric flow charts so please don't try to melt my brain by posting one. Seriously, don't even bother I will drool on myself as if I was trying to figure out the secret behind Kanji.
Old 03-17-12, 06:58 PM
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Speedo is mechanical not electrical, so what do you need to know how to wire?
Old 03-17-12, 08:26 PM
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The instructions on page 2 say to connect to the speed sensor wire at the ECU. I dont think the FC has such a signal.
Old 03-17-12, 09:38 PM
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Originally Posted by Logicalbomb
I am looking to wire in a dash mounted prosport speedometer. Before you go off on why doesn't my stock one work it's because my steering wheel gets in the way of 45-70mph. Now that we've kept the trolls at bay, I would like to ask "how do you wire this?".

Has anyone wired in aftermarket gauges and the speedometer specifically? I want to be able to do this myself so I don't have to pay an arm and a leg. I have done all my stereo wiring, fuel cut off switch, and my slimline e-fans for my koyorad. I am confident that if I could get some direction on this that it would be a project I could tackle. I have no idea how to read electric flow charts so please don't try to melt my brain by posting one. Seriously, don't even bother I will drool on myself as if I was trying to figure out the secret behind Kanji.
you dont have tilt wheel?
Old 03-17-12, 09:43 PM
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Originally Posted by barkz
you dont have tilt wheel?
tilt wheel doesn't fix being 6'6 hombre =D
Old 03-17-12, 09:46 PM
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I didn't know my speedo was mechanical, also, I don't know if that is going to work with the prosport then? I was hoping it was going to be some obscure point on the ECU.
Old 03-17-12, 10:00 PM
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lol just remove your drivers seat and sit on the floor!
Old 03-17-12, 10:34 PM
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I dont know about prosport but autometer has a mechanical to electrical adapter I believe.
Old 03-18-12, 01:13 AM
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Originally Posted by barkz
lol just remove your drivers seat and sit on the floor!
I am planning on removing the cubbies behind the seat and the rails under it to bolt down a Momo super cup XL seat directly into the floor. That way I can sit lower and back further, and when I hit a speed bump I wont smash my head on the roof People wont call me donkey cart -.- STOP LAUGHING, I know you read that and laughed.
Old 03-18-12, 01:15 AM
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Originally Posted by Thumpher86
I dont know about prosport but autometer has a mechanical to electrical adapter I believe.
I am going to have to check in to that, I guess I will end up disconnecting my speedo in my cluster, I will probably do the tach at the same time as well. I am just getting in the gauging everything in my car phase in prep for the return to boost. My main concern is not getting pulled over because I can't see my speedo lol, cops don't give a **** when I tell them I couldn't see it so I guessed.
Old 03-18-12, 09:33 AM
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$99 gps will give you vehicle speed, or get a gps speedo
Old 03-18-12, 06:28 PM
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Originally Posted by Rob XX 7
$99 gps will give you vehicle speed, or get a gps speedo
Although that seems like a proper solution in some cases I don't know how accurate it would actually be or how responsive it would be. Not to mention the prosport has programmable warning lights and top speed recall. Not only do want a speedometer I can read, I want one that helps me out when I go bombing out on track days.

Thanks for the tip though, I appreciate the creativity and an attempt to find a solution to my problem
Old 03-18-12, 06:51 PM
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Originally Posted by Logicalbomb
and an attempt to find a solution to my problem
The FD VSS (Vehicle Speed Sensor) will fit the FC tranny after the driven gear has been replaced, it's possible the Miata VSS would fit as well.
Problem solved.
Old 03-18-12, 07:01 PM
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Originally Posted by Logicalbomb
Although that seems like a proper solution in some cases I don't know how accurate it would actually be or how responsive it would be. Not to mention the prosport has programmable warning lights and top speed recall. Not only do want a speedometer I can read, I want one that helps me out when I go bombing out on track days.

Thanks for the tip though, I appreciate the creativity and an attempt to find a solution to my problem
Check out the speedhut gps speedo, you can custom configure it with lights if you wish
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