North American Turbocoupe Organization



GIllis valve hookup question?
ianbfromct Offline
Senior Member
#1
The previous owner had hooked up a bootleg boost controller in a different manner in which Gilli's instructions advised. Im trying to find out on the inlet side of the turbo he has both nipples plugged off. I believe one of the two nipples is supposed to have a vacuum hose going to the stock intercooler. Is this true? Right now on the TMIC one nipple is plugged and the other nipple is running to a check valve to the vacuum tree.

[Image: Gillis.jpg]

[Image: Gillis_Valve_Diagram.jpg]
88 5 speed TC
-3" DP,lowered, 255 Walbro, Gillis valve, Cobra R's, bondo/rust, Stinger's PIMP Ecu
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Pete D Offline
Administrator
#2
Ian, Yes one side of the 2 port fitting on the stock IC outlet goes to one of the two "capped" ports on the compressor OUTLET. (doesn't matter which capped port it is) The other port on the compressor OUTLET has a line running to the directional control valve. This is to provide some vacuum to the cruise control when the engine is in boost.

http://turbotbird.com/faqs/Vac_Diagram.htm
Pete Dunham


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ianbfromct Offline
Senior Member
#3
Pete D Wrote:Ian, Yes one side of the 2 port fitting on the stock IC outlet goes to one of the two "capped" ports on the compressor OUTLET. (doesn't matter which capped port it is) The other port on the compressor OUTLET has a line running to the directional control valve. This is to provide some vacuum to the cruise control when the engine is in boost.

http://turbotbird.com/faqs/Vac_Diagram.htm

So Pete this is how its setup now..this is the TMIC
[Image: IMAGE_482.jpg]

And this is how my turbo is setup with the plugs
[Image: IMAGE_483.jpg]

So I can pull off one of the plugs on the turbo and run that to the IC?

Not sure about the outlet hose though..ill have to look
88 5 speed TC
-3" DP,lowered, 255 Walbro, Gillis valve, Cobra R's, bondo/rust, Stinger's PIMP Ecu
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Pete D Offline
Administrator
#4
Ian, the top picture, of the 2 port fitting, should not be capped off. The port with the cap should be uncapped and a hose run to one of the ports on the turbo inlet pipe, in the second picture
Pete Dunham


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Jeff K Offline
Administrator
#5
Ian, does your cruise control work correctly? The missing "vac" line from the fitting on the IC to the turbo inlet is the bleed off for the aspirator that provides vac to the CC servo under boost, such as going up a steeper hill, etc.
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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