North American Turbocoupe Organization



Boost leak?.
Adrock Offline
Junior Member
#1
So why am I hearing my boost venting to atmosphere? It sounds like I have a blow off valve with two light of a spring or one that is stuck open. But as I understand my car with the ihi baby turbo doesn't even have a blow off valve correct? So where is it coming from why do I hear it so loud and why is it happening?
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BigJake Offline
Member
#2
Check your intercooler turbo, throttle body hoses for damage or blown off.
1987 Thunderbird Turbo Coupe 5 speed Boosting 25 PSI with Boport/Stinger parts !
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Mikey97D Offline
Member
#3
The coupling between the intercooler and turbo went bad on mine probably because of all the heat coming off the turbo. I replaced the coupling to fix because the original was in very bad shape.
1988 TC, 5 spd, Stinger 3" Exhaust, Schneider Roller Cam, -4° Cam Pulley, Cone Filter, Gilles Boost Control Valve set at 17 psi, Walbro 255 lph, CHE Rear Lower and Upper Control Arms, Braided Brake Lines, Hawk HPS 5.0 Front and HPS (F) Rear, CRES Inserts in front calipers, and '93 Cobra Wheels with General 235/50R17 Tires.   
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Jeff K Offline
Administrator
#4
Within a year or so of getting my TC the turbo to stock IC blew at 15 psi boost. It split nearly in half and made a HUGE bang. Got some replacement silicone hoses and T bolt clamps that have have held up fine at 24 psi boost for the last 21 years.
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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Adrock Offline
Junior Member
#5
That was it. Thanks guys
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