North American Turbocoupe Organization



wire insulation
grey88smokin Offline
Posting Freak
#1
Ok I need some wire insluation for the wires going from the TFI to the PIP on my remote TFI. I am using aluminum foil, somebody at work said it was a conductor and would make RFI and RMI worse, that true ? Well either way I feel like the car is not 100%, werid miss at idle and hard starts, directly after the mod. I went to Home depot, a radio store, aid auto, and radio shack and came home empty handed. Any suggestions on where online or any local stores that would have a good shield for the wires. Then I can finaly get my write up finished on this too, so that its is correct.

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My TC
84 SVO 1C
08 MKZ
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AerobirdMotorsports Offline
Banned
#2
I've seen a few factory remote TFI birds and they all had the same black plastic stuff over the wires. The TFIs were mounted to the front of the upper radiator support. I did notice heavy corrosion of the remote mounts due to dissimilar metals and high water vapor content, so it might not be the best place for one. (Hence why I didn't buy it from the JY, I also haven't had any problems on the dozen TCs that I've had where it's at) Check your grounds, I get all sorts of strange stuff when a ground is "off". Hope this helps,

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Michael Pinto
www.aerobirdmotorsports.com

1988 Med Red/Red leather 5Spd, all options, getting a fresh motor, BBK 255lph pump, Kirban AFPR, Cruzin' 35#s, AM IC hoses, Gillis Valve, AM prototype cold-air kit, 2' long open exhaust Wink, Optima, 16.48 on 3 cylinders!
1987 Code 33 Silver-Blue/Charcoal cloth, currently making my lawn look white trash, will soon be a race car
1988 White/Charcoal cloth auto, g/f's car, HL mod, Clarion CD/Stereo
1988 Shadow Blue/Blue cloth 5Spd, hit by truck, missing engine
1988 Cougar LS Med Red/Red cloth, 5.0/auto, daily driver
1984 Silver/Grey leather, 5Spd, no engine/trans, parts car
1992 Dk Green SHO 5Spd, feature car, 13.37 @104, for sale

RIP-1988 Med Red/Charcoal cloth 5Spd, all options, McK kit, spoiler
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TCKen Offline
Member
#3
I just finished remote-mounting the TFI in my car and it runs and idles better than it ever did! Mounted it on the driver's side inner fender where the battery used to be.

On my remote TFI, I used a wire with the insulation stripped off and ran it with the three wires between the distributor and the TFI and grounded it on one of the TFI heat sink mounting bolts with an eyelet connector. Then I wrapped the PIP signal and bare ground wires (only) with aluminum foil. DO NOT ground either the bare wire or the foil shield at both ends as this will create a ground loop and cause all sorts of problems!

Where I extended the factory TFI connector to the remote TFI, I also included a bare ground wire spliced into the factory bare shield wire and extended the factory foil shield wrapped around the dark blue PIP, yellow spout, and the black ground wires with more foil. Do not wrap the two red wires or the green coil wire in the foil and do not gound the bare wire or the foil shield at the TFI end (they are already grounded at the EEC).

Hope this helps.

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88TC, Black/Raven, Gillis valve, K&N cone on VAM, MSD ignition box, coil, and plug wires, Hurst Mustang T5 shifter, 2 1/2" cat-back duals, trunk battery with disconnect, CHE rear control arms.

[This message has been edited by TCKen (edited 08-19-2005).]
Ken Humphrey

88TC, Black/Raven, T5 manual, 130 amp alternator, MSD ignition, 2 1/2" duals, trunk battery with disconnect, CHE rear control arms.
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Jeff K Offline
Administrator
#4
A metallic shield around the wires is a good idea, as long as the shield is grounded at only one location. The "grounded at only one location" part is IMPORTANT!!! Whoever told you that shielding would make RFI/EMI worse doesnt know what they are talking about.

For shielding, try Digikey, www.digikey.com

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Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 23 psi, forced air intercooler, water injection, bypass valve, Ranger roller cam, subframes, etc., etc.. // 86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP nitrous, ignition, gears, suspension, etc., etc.... // 91 Escort: Bone stock winter car // 04 Taurus Duratec (wifes car) // 91 Topaz (daughters first car)
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
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Joe F Offline
Posting Freak
#5
If you have access to any RG-58 coaxial cable you can carefully strip away the outside insulation and expose the shield. Then the braided shield can be stripped off the coax and used as your TFI shielding. Finally cover it with a long piece of heat shrink tubing. RG-58 should be available at Radio Shack.

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Joe F.
JR's Aerie - Our 3 TC's
JR's Place - My '87 Turbocoupe
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4cammer72 Offline
Posting Freak
#6
these guys here are right. ive been in communications for 25 years working with cabling and the shielding works! the guy doesnt know what he's saying.
88tc (sold) but keeping an eye out.
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grey88smokin Offline
Posting Freak
#7
Thanks for the replys [Image: biggrin.gif] I had a feeling he didn't know what he was talking about. Maby because the aluminum foil isn't grounded ? What would that get grounded to, the fender or something like that ?
O and while we are on grounds, I will need a ground for the O2 sensor when I swap turbos and know that the firewall is not a good spot from what I saw Jeff K post on TF. Where do you guys relocate them to ?

Thanks [Image: biggrin.gif]

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My TC
84 SVO 1C
08 MKZ
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karnage Offline
Member
#8
I believe that the factory TFI harness had a foil type cove ron it,but it was grounded if I remember right.When I wrapped mine I just used high temp electrical tape and used the convoluted plastic wire cover that slips over the harness.
84 TC with 88 hood LA-3 full 3" exhaust Rods header ported/polished big valve head schneider roller cam RW adj cam gear Kirban gillis at 20 # boost MSD ignition 255 lph Walbro full gauges
17 inch centerlines 944 front mount IC 80mm MAF
65mm tb-rotated intake on the way to 400HP
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TCKen Offline
Member
#9
As I noted in my reply above, the factory TFI connector harness includes a bare ground wire (grounded at the EEC) ran with the dark blue PIP, yellow spout, and the black ground wires with a foil shield wrapped around all of them (the two red power wires and the green coil wire are NOT wrapped in the foil, this keep the noise in the power wires from interferring with the computer signals).

The foil shield is grounded because its in contact with the bare wire in the harness which is grounded at the EEC.

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88TC, Black/Raven, Gillis valve, K&N cone on VAM, MSD ignition box, coil, and plug wires, Hurst Mustang T5 shifter, 2 1/2" cat-back duals, trunk battery with disconnect, CHE rear control arms.

[This message has been edited by TCKen (edited 08-19-2005).]

[This message has been edited by TCKen (edited 08-19-2005).]
Ken Humphrey

88TC, Black/Raven, T5 manual, 130 amp alternator, MSD ignition, 2 1/2" duals, trunk battery with disconnect, CHE rear control arms.
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IMINHELL Offline
Member
#10
If you are replacing the shielding along the whole length of the cables go here: http://cableorganizer.com/metal-braided-sleeving/

If it is just a patch job go here: http://www.majr.com/HTML/shieldingtape.html ; I belive this is the same tape used from the factory. This web site also other EMI/RFI products at: http://www.majr.com/HTML/shielding.html

Hope this helps.
"Don't hate me because I'm beautiful, hate me because I'm an asshole"
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