North American Turbocoupe Organization

vacuum lines on 87 tc
raylesk Offline
Junior Member
Can someone tell me what the vacuum line from the intercooler to the inlet of the turbo is for? I was just going over a car that I bought and that one is missing.I understand the BCS valve being a bleed to control boost and all other vacuum lines but that one doesn't make sense to me.

Pete D Offline
Some of us think it's a feed for the speed control booster, a source of vacuum when the intake manifold and the vacuum tree are under boost conditions

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88 TC X 2, 86 SVO, Main TC with K&N, 3"DP to 2.5"duals through Dynamax, Ric valve at 17+ and disconnected KS. Elite Bodega 16" chrome wheels. Autometer pod w/ A/F and Vac/boost gauges.140 mph Motorsports Speedo New engine: Total Seal rings and TRW pistons, ported and polished head w/ cc'd chambers,1.59"exhausts, SS valves, gutted upper, knife edged lower, A-230 cam, Race Engineering Adj Cam Sprocket, Crowlers, ARP head studs, and rod bolts. Walbro 255 HP pump and Kirban adj FPR, T-3. Centerforce II, KB subs and jack rails.
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