WRX 01 final tuning
08 September 2002, 12:18 AM
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after months on this treads i finally completed my impreza tuning.
I had previously fitted a PPP. now i added a dump valve, a wastgate, and a small "trumpet" in the air box to help intake air flow. i removed the cat in the uppipe maintaining the OE pipe, i cut away the cat in the down pipe replacing it with a slightly larger expansion ( to use it like a resonator to decrease the noise).
the result is really impressive. Huge power (that I want to quantify soon with a dyno). An omogeneous power delivery under 4000 rpm and a monstrous push after. The car is perfectly driveable in the slow traffic without any idling problems.
The boost reached in 5th gear 1,35 bar for 0.5 sec , 1,15 @ 6000 rpm , 0,9 bar @ 7000.
C.
I had previously fitted a PPP. now i added a dump valve, a wastgate, and a small "trumpet" in the air box to help intake air flow. i removed the cat in the uppipe maintaining the OE pipe, i cut away the cat in the down pipe replacing it with a slightly larger expansion ( to use it like a resonator to decrease the noise).
the result is really impressive. Huge power (that I want to quantify soon with a dyno). An omogeneous power delivery under 4000 rpm and a monstrous push after. The car is perfectly driveable in the slow traffic without any idling problems.
The boost reached in 5th gear 1,35 bar for 0.5 sec , 1,15 @ 6000 rpm , 0,9 bar @ 7000.
C.
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