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This is great info here! I would like to install a boost gauge...not because I want to increase power or performance but because I would like to track what exactly is going on under the hood, approximately. The instrument cluster does have the Volvo boost gauge in it (top right corner) but it is not marked with numbers except some colors (yellow, red). It would be good info, to know what boost the car is currently using/producing, I always wondered. That would have been my first question but I'm glad I found it here. So the most ideal boost gauge would probably be one that reads 0-15 (maybe even 20)? --for a car like mine--- with stock/near stock settings/timing/injectors/turbo. I found a T junction under the steering wheel (one end of the T appears plugged with a screw) and I assume this car had a 2nd boost gauge before (maybe for reference and experimental purposes?).. EGT gauge. Where exactly would you place that (I mean the probe/sensor)? What's the most ideal location for most accurate measurements? (Exhaust manifold?) What are the high temps down there? other forums mention 900-950 Celsius (!) for bricks with a turbo. Seems super high. Intake pressure control valve at the front of intake--- overboost release valve? I took it off for cleaning and to check its o-ring (needs a new one I think). I made a little tool to measure the valve (spring action) opening pressures and measured appr 19-20 there. I turned the thing clockwise (in) with the flat head screwdriver then I measured 22-25, never more than 25. I should read about its purpose and the proper way to set it up/check/keep it stock. I assume that the two wires are simply just sending an input to cluster that it opened? How does the feedback indicator light look? Is it the red arrow pointing upward? No idea. I thought that was an automatic tranny thingy... I remember seeing it sometimes, sometimes too often, then I pulled the bulb, I think. The wires to that valve also disintegrated and I thought I should ask you guys about this whole unit. In the meantime I am locating this in the Greenbook, too. I remember seeing it mentioned somewhere. How to set/check/adjust this thing, and what to set it to (stock specs/values)? In the meantime I found a page in the Greenbook that mentions some numbers. I will connect the wires at the intake front to see if any lights come up on my cluster, then go from there.. Last edited by RedArrow; 01-18-2023 at 09:51 PM. |
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