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Suspect reprogramming alone isn't enough! XC90

posted by  Spike1911 on  Tue Aug 3 05:43 CST 2004
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I would think that the biggest benefit from a more free-flowing exhaust would be quicker turbo spoolup as you eliminate backpressure on the turbine side. This benefit will be limited, however, without removing the biggest restriction, the catalytic converter, and opting for a high-flow replacement. I agree that an aftermarket intake filter will only net you negligible HP gains.






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New ECU upgrade for the 2.5 and 2.9 XC90 [XC90]
posted by  Mr. P  on Fri Jul 23 05:52 CST 2004 >


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