I recently got a 1983 300SD and although my 3rd Benz and 2nd Diesel, it's my first turbo charged one. I had 2 1988 Ford Thunderbird Turbo Coupes and I installed a boost control solenoid on it to crank the boost up to 18psi and the cars were rockets. I've been trying to read up on something similar here and can't seem to find much. Maybe it's called something different here or just can't be done? The reason I ask is that I can't even hear the turbo spooling on my car. It's got only 131k on it and was owned by 1 owner. Can you just not hear it because its a loud diesel? I was thinking about hooking up a small boost gauge somewhere inside to see exactly what its cranking out. Any input on all these questions would be appreciated.
Thanks!!

This is what I used for the Tbirds...very basic and you just dial it up to the desired boost you want. http://www.ebay.com/itm/Manual-Boost-Controller-Mustang-SVO-Turbocoupe-Ford-2-3L-turbo-Gillis-valve-/271055600232?pt=Motors_Car_Truck_Parts_Accessories&hash=item3f1c2c3a68&vxp=mtr

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2022 Nissan Frontier Pro4x
1990 Mercedes 420SEL
1950 Packard 8

Previous German cars-
2001 Mercedes SL500
1983 Mercedes 300SD
2011 BMW 328i (manual)
2008 BMW 535xi (manual)
2006 BMW M3 (manual)
1980 Mercedes 300TD
2006 BMW 750i
1996 Mercedes E300D
1994 BMW 740i
2006 BMW 330xi (manual)
1999 E300DT Smoke silver/black 253k
2012 BMW 535i Xdrive M-Sport
1984 300TD-T 304k
1988 Mercedes 560SEL (parts car)
2010 BMW 550i xdrive
2017 Audi A4 Presitge
1979 300SD 313k
2003 E500 189k