Speedo swap
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From: AK
Car: 92 camaro RS
Engine: Vortec 355,262/268 cam,670holley
Transmission: 5speed
Speedo swap
Hey guys I Ak in the process of doing a 355 vortec swap and I am getting rid of my ECM as well so I need help figuring out what I need to do to swap from a electric speedo to a mechanical. I have a t5 trans. Thank you
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From: Arlington, Tx
Car: 91 Camaro RS
Engine: empty bay (for now)
Transmission: Built T-56
Axle/Gears: 3.42 stock posi disc
Re: Speedo swap
speedo will work fine if its stock motor was the 305 tbi.
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From: AK
Car: 92 camaro RS
Engine: Vortec 355,262/268 cam,670holley
Transmission: 5speed
Re: Speedo swap
how will it work if i am deleting the ECM and the tbi vss is electric? can i still use electric vss with no ecm?
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From: Arlington, Tx
Car: 91 Camaro RS
Engine: empty bay (for now)
Transmission: Built T-56
Axle/Gears: 3.42 stock posi disc
Re: Speedo swap
305 tbis use a vss buffer box, the raw vss signal goes into the box then is then output to both the ecm and the speedo. as long as you dont remove the buffer box, the speedo will still get the correct vss signal.
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From: AK
Car: 92 camaro RS
Engine: Vortec 355,262/268 cam,670holley
Transmission: 5speed
Re: Speedo swap
Interesting, thanks. Guess I'll just have to find this box and trace the wires. Is there a way to just connect the wiring harness from under the dash. Or would all the gauges still work with the swap and plug into the harness
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From: Arlington, Tx
Car: 91 Camaro RS
Engine: empty bay (for now)
Transmission: Built T-56
Axle/Gears: 3.42 stock posi disc
Re: Speedo swap
you dont have to trace or swap anything. just unplug the ecm. the gauge will continue to work as normal. the vss buffer box is a yellow looking thing near the ecm.
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From: AK
Car: 92 camaro RS
Engine: Vortec 355,262/268 cam,670holley
Transmission: 5speed
Re: Speedo swap
I guess what I'm trying to figureout is I have to use after market harness for the gauge and I'm trying to picture how to plug it in so it'll work
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iTrader: (1)
Joined: Mar 2007
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From: Arlington, Tx
Car: 91 Camaro RS
Engine: empty bay (for now)
Transmission: Built T-56
Axle/Gears: 3.42 stock posi disc
Re: Speedo swap
unless youre switching to an aftermarket gauge, you dont need an aftermarket harness
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From: Arlington, Tx
Car: 91 Camaro RS
Engine: empty bay (for now)
Transmission: Built T-56
Axle/Gears: 3.42 stock posi disc
Re: Speedo swap
if its an aftermarket speedo, itll be programable (most likely) if thats the case it can get its vss signal from the buffer box, or straight from the vss. if you want to keep cruise control, dont touch the vss buffer box.
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From: AK
Car: 92 camaro RS
Engine: Vortec 355,262/268 cam,670holley
Transmission: 5speed
Re: Speedo swap
ok, thanks. i dont have cruise control. i have seen the pre drilled dash for 92 with the 5 in tach and speed do you know if they make them in 3 3/8?
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From: Arlington, Tx
Car: 91 Camaro RS
Engine: empty bay (for now)
Transmission: Built T-56
Axle/Gears: 3.42 stock posi disc
Re: Speedo swap
i asked classic dash when they first came out. they dont offer them on the site, but you can get them to drill out a blank panel in the 3 3/8th size. or just get panel thats not drilled and drill the holes yourself.
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From: AK
Car: 92 camaro RS
Engine: Vortec 355,262/268 cam,670holley
Transmission: 5speed
Re: Speedo swap
traivs i just saw your complete auto meter swap, did you do a post on how you hooked all your gauges up? i know im a PITA lol. im new to this whole 3rd gen thing. thanks for all the help.
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From: AK
Car: 92 camaro RS
Engine: Vortec 355,262/268 cam,670holley
Transmission: 5speed
Re: Speedo swap
awesome looks like ill be calling CD on monday. i bet the shipping is gonna be nice lol. gotta love being stuck in ak, only a year left.
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From: Arlington, Tx
Car: 91 Camaro RS
Engine: empty bay (for now)
Transmission: Built T-56
Axle/Gears: 3.42 stock posi disc
Re: Speedo swap
i made my own harness that taps into the stock cluster wires. the gauges just have regular spade terminals and theyre labeled. this will help.
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From: AK
Car: 92 camaro RS
Engine: Vortec 355,262/268 cam,670holley
Transmission: 5speed
Re: Speedo swap
your a godess lol. guess now i will just have to figure out which ones i will need. this is gonna be a headache lol.
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From: Arlington, Tx
Car: 91 Camaro RS
Engine: empty bay (for now)
Transmission: Built T-56
Axle/Gears: 3.42 stock posi disc
Re: Speedo swap
i would hope im not a godess. thats just creepy. i will admit that i am awesome though 
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From: AK
Car: 92 camaro RS
Engine: Vortec 355,262/268 cam,670holley
Transmission: 5speed
Re: Speedo swap
lol you meant what i knew. im confused on how you grounded all your gauges and there is only 1 ground wire per connector
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From: AK
Car: 92 camaro RS
Engine: Vortec 355,262/268 cam,670holley
Transmission: 5speed
Re: Speedo swap
did you keep the stock harness with your engine swap and just tap into the connectors at the dash?
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From: Arlington, Tx
Car: 91 Camaro RS
Engine: empty bay (for now)
Transmission: Built T-56
Axle/Gears: 3.42 stock posi disc
Re: Speedo swap
yea you can get wire taps from many places. it just snaps over the wire and lets you plug in a spade connector.
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From: Arlington, Tx
Car: 91 Camaro RS
Engine: empty bay (for now)
Transmission: Built T-56
Axle/Gears: 3.42 stock posi disc
Re: Speedo swap
everything runs off of senders that has wires that go into the dash cluster.
Last edited by travis401; Dec 10, 2011 at 03:24 PM.
Thread Starter
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From: AK
Car: 92 camaro RS
Engine: Vortec 355,262/268 cam,670holley
Transmission: 5speed
Re: Speedo swap
Ok I'll just have to figure out how to ground and light everything thanks for all the help
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From: Arlington, Tx
Car: 91 Camaro RS
Engine: empty bay (for now)
Transmission: Built T-56
Axle/Gears: 3.42 stock posi disc
Re: Speedo swap
grounds and illumination wires are included in the pinout
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From: AK
Car: 92 camaro RS
Engine: Vortec 355,262/268 cam,670holley
Transmission: 5speed
Re: Speedo swap
I saw that but there is only one ground per connector can u wire all the gauges to one ground and lighting connector
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From: Arlington, Tx
Car: 91 Camaro RS
Engine: empty bay (for now)
Transmission: Built T-56
Axle/Gears: 3.42 stock posi disc
Re: Speedo swap
theres actually 4 different ground wires in the cluster. you can split the gauges among them and be fine. i have all my gauges running off those grounds.
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From: AK
Car: 92 camaro RS
Engine: Vortec 355,262/268 cam,670holley
Transmission: 5speed
Re: Speedo swap
ok thanks. is our fuel pumps 73 ohms empty and 10 full? i was looking at getting the phantom gauges.
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From: Arlington, Tx
Car: 91 Camaro RS
Engine: empty bay (for now)
Transmission: Built T-56
Axle/Gears: 3.42 stock posi disc
Re: Speedo swap
you can get the phantom fuel gauge in a 0-90 ohm short sweep
http://www.summitracing.com/search/D...?Ns=Rank%7cAsc
thats all autometers fuel gauges that will work
http://www.summitracing.com/search/D...?Ns=Rank%7cAsc
thats all autometers fuel gauges that will work
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From: AK
Car: 92 camaro RS
Engine: Vortec 355,262/268 cam,670holley
Transmission: 5speed
Re: Speedo swap
well talked to classic dash and they only offer blank or the dash for 5" tach and speedo. thinking about fabing one up to see how itll look. any ideas?
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