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1987 Buick Grand National Twin Turbo Install - Dynamic Duo

1987 Buick Grand National
The wideband O2 for the FAST... 
   
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1987 Buick Grand National
The wideband O2 for the FAST XFI system is threaded into the welded bung on the downpipe, and tightened with a 7/8-inch wrench.
1987 Buick Grand National
The turbo intake pipes and... 
   
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1987 Buick Grand National
The turbo intake pipes and large conical air filters connect via a rubber hose and sturdy band clamps.
1987 Buick Grand National
Since the front mount intercooler... 
   
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1987 Buick Grand National
Since the front mount intercooler was already installed,...
1987 Buick Grand National
it was just a matter of connecting... 
   
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1987 Buick Grand National
it was just a matter of connecting the rest of the plumbing with the band clamps and rubber hose.
1987 Buick Grand National  1987 Buick Grand National
1987 Buick Grand National
A longer serpentine belt is... 
   
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1987 Buick Grand National
A longer serpentine belt is supplied with the kit to accommodate the relocated power-steering pump and new pulleys.
1987 Buick Grand National
The 3-inch intake pipe was... 
   
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1987 Buick Grand National
The 3-inch intake pipe was finally connected to the 70mm throttle body, and we were just about done.
1987 Buick Grand National
John connected small hoses... 
   
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1987 Buick Grand National
John connected small hoses and Ts to the wastegates, then ran the hose through the firewall and into a manual boost controller mounted inside the cabin. They had a few more loose ends to tie up before the GN was ready for the dyno, including installing the FAST XFI box, relocating the IAT sensor, and rebooting the plug wires with 45-degree bends to clear the twin-turbo manifolds.

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