North American Turbocoupe Organization



Fixed Orifice
Matt S Offline
Posting Freak
#1
Still doing my 134 conversion.
Blasted rain!!

But now I have the heater box out. I'm going to flush everything today and tomorrow.

My question is about the orifice tube. I bought a new one for $4, but the haynes book mentions needing a special tool? Is replacing this thing possible without the tool? Is it even necessary?
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Jeff K Offline
Administrator
#2
Dont fix what isnt broke. If the orifice tube isnt plugged up, just leave it.

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Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 20 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 // 02 Taurus Vulcan(wifes 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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Matt S Offline
Posting Freak
#3
Thought I had to do it with the 134 conversion. But looking around I see not many do and their A/C works fine. Thanks for the reassurance, Jeff.
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Jeff K Offline
Administrator
#4
The original orifice tube will work fine with 134a. Since the pressure / temp relation is a little different for 134a, you can help things a little by slightly reducing the pressure the CCPS (switch sticking straight up out of the accumulator with 2 wires to it) cycles at. Remove the connector, and you will see a screw. Turn the screw 1/8 to 1/6 turn counterclockwise to lower the turn on and turn off pressure by about 3 psi.

------------------
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 20 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 // 02 Taurus Vulcan(wifes 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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