NOTE: This upgrade will usually increase an average Turbo 900 to about 204 horsepower but completely depends on the shape of the vehicle and whether or not you add the 2.8 or 3.0 bar fuel pressure regulator along with the fuel control module. The 2.8 bar fuel pressure regulator keeps the engine from running excessively rich but aids in the performance of the vehicle. The 3.0 fuel pressure regulator also aids in performance as well but has shown signs of running excessively rich in very busy stop and go driving. Keep in mind that the objective of the 2.8 and 3.0 fuel pressure regulator is to decrease the combustion chamber temperature by adding more fuel in an attempt to prevent detonation. Detonation is absolutely dangerous to a turbo engine. You SHOULD NOT purchase this product if your not mechanically inclined. Damage can occur if you do not keep an eye on how this product is used.
NOTE: Solenoid failures often cause excessive boost pressure which causes the fuel pump to be shut off. Make sure you do not have any major vacuum leaks prior to ordering this
NOTE: This is the piece located directly below the distributor and usually has oil on top of it from the leaking ignition distributor. It is attached to the top of the Exhaust manifold
NOTE: The Knock sensor detects engine knock or detonation in the cylinders. When the sensor detects the knock the engine timing is retarded to cool down the combustion chamber to eliminate the knock
Note: Bosch now shows these valves as superceeding to the same numbers. The cheaper version valve is now classified as the Heavy Duty version. If you looking for a valve to increase the boost going into the engine because the spring rate is adjustable then buy the stainless valve not the plastic one.
NOTE: The 1991-1994 Turbo (non-spg) you can also use part # 8823411. The real difference is that the 91-94 version is a Mitsubishi turbo but they will interchange fine.
NOTE: Always replace the supply line when replacing the turbocharger. If you do not replace the supply line and it is clogged up then the turbo will fail within a few miles after installation because there will be no oil supply to the turbo. If you decide NOT to replace the line then at least make sure that the line has a good flow of oil coming through it prior to cranking the car.