Stock an R32 GT-R runs about 10 psi of boost. However the stock boost gage reads in torr, or mmHG. Half way on the stock boost gage is about 3.5 x 100 mmHG or about 6.7 psi of boost. A factory R32 GT-R with the boost restrictor in, should read just above the first mark, or about 10 psi. If it reads 7, or 700 mmHG, that is closer to about 13.5 psi, and the restrictor has probably been removed.
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Voltage, Engine Oil Temperature, and Factory boost gauge in an R32 GT-R |
Fuse box, factory boost solenoid, and battery |
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The famous boost restrictor on a Nissan Skyline GT-R |
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Restrictor size. About 1.6 mm. |
Now for the potential non fun parts. These cars are 25, 27, 30 years old. The systems are not new. The condition of the fuel pump, fuel injectors, timing, turbochargers, ECU are all unknowns. Any of these items can let go sooner if you up the boost. There are lots of ROM tuned ECU's out there, that are very aggressive on the timing. If you are running 91 octane fuel, with aggressive timing, and 14 psi, you have a really good chance of hurting the engine, specifically #6 cylinder. If you don't hurt the engine, you can knock a ceramic exhaust wheel off. Unintentional single turbo RB26 are not as fun as twin turbo ones.
Basics
Fuel system
Fuel pump
Setting Ignition Timing
Boost control
Turbochargers
ECU
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Buy-R.com for Nissan Skyline GT-R and GT-R parts.
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