Yahoo Autos Five Steps to Making More Power in Your Subaru WRX
More Mods For Our Project WRX
The Subaru Impreza WRX is a performance bargain: A quarter-mile time of 13.5 seconds at 101 mph is as quick as any WRX STI we’ve tested, and the standard WRX model is about 10 grand cheaper. Being power hungry, we have investigated a number of claims that even more output-over the stock 265 horsepower and 244 pound-feet of torque-is available with a few simple modifications. As we found, your results may vary. Here’s how we got that extra power:
STEP 3: But They Don’t Add Up
We put our project car on a dynamometer with the K&N Typhoon intake and the Magnaflow exhaust (the numbers mentioned earlier were achieved with each performance piece installed solo on the WRX). With both installed, horsepower was up by 11 over stock and torque was up 20 pound-feet-increases that are less than those produced by the modified intake alone. The extra airflow on both ends was apparently too much for the factory ECU to cope with, and it compensated by cutting power right when the turbo reached maximum boost. Either the intake or exhaust works fine alone, but ECU modifications are required to get them to work in tandem.
Waiter, Check Please!
K&N Typhoon kit.................................................................. $322*
Magnaflow exhaust............................................................ $774*
Cobb Tuning AccessPort................................................... $695
Cobb Tuning downpipe...................................................... $595
Custom engine tune............................................................ $460
Bridgestone Potenza RE-11 tires....................................... $732
Total................................................................................ $3578
*Suggested price, actual retail price may differ.
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