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Old 06-06-2017, 07:22 AM
v8volvo v8volvo is offline
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Join Date: Jun 2009
Location: Montana, USA
Vehicle: '86 745, '83 764
Posts: 1,618
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Nice looking setup. However we can't tell you much from the pictures unless you do some checks and get answers.

I suggest you start by plugging your boost gauge in somewhere ahead of the intercooler, best way may be to tap into the line running from the compressor housing to the wastegate. Take it for a drive and see if you are seeing the same boost response as you saw in the intake manifold.

If you see no change, then you'll need to check the wastegate and boost controller for correct configuration or other issues, and check again for possible restrictions in the air inlet to the turbo, the exhaust, or the fuel system.

If you do see different pressures from this test, then it means you have a restriction in the intake path between the turbo and the intake manifold, probably in the intercooler, the intake manifold inlet, or one of the hose connections.

We'll be able to help you more once you have concrete answers to these questions, until then, we can only speculate.
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86 745 D24T/ZF 345k lifted 2.5"
83 764 D24T/M46 155k
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