I've got the 6152E with the mods in my sig. I am running the stock intercooler and stock exhaust minus cat. Unopened engine with stock valve springs.
I've only run my car in the 1/8, and I'm not totally sure what the boost was. The gauge would only read to 16lbs, but probably somewhere between 18-22 lbs. I had my TurboTweak chip set at 21 degrees of timing. I was only able to get one run in at near full throttle because all of my vaccuum hoses were blowing off (including the fuel pressure regulator  ), I'm luck to still have headgaskets.
Anyway I ran a 7.9 at 90 mph with a 1.95 60'. Pump gas and alky.
The turbo spools just fine with my converter. I drove it for a little while on the stock converter and was not impressed.
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86 GN, GT6152, 42.5lb injectors, 3200 stall Art Carr 9.5", Turbotweak chip., RJC power plate, Hotwired fuel pump, adjustable fuel pressure regulator, Scanmaster, SMC alchy kit.
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