GrammatonJP
Golden Member
- Feb 16, 2006
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2006 Changes
Starting from the intake side, the diameter of the inlet pipe leading to the air resonator has been increased from 70mm to 80mm. The throttle body has been enlarged from 60mm to 64mm. These changes are said to be responsible for an intake airflow capacity, helping the motor gulp as much as 110 liters/second (up from 95 liters/second). To allow the motor to injest this extra 15 liters per second, the intake valves have been enlarged by 1mm (to 36mm). A revised high-rpm profile on the intake camshafts results in a 0.9mm increase in valve lift and 14 degrees of extra duration (opening 2 degrees sooner, and closing 12 degrees later). Obviously, if you're burning more air and fuel, you have to do something with the spent gases. So to deal with the added volume of exhaust, the head pipe (the pipe below the 4 primaries on the header) has been enlarged from 60mm to 65mm. The catalytic converter has been spec'ed up to a higher flow rate, and behind the cat, the remainder of the exhaust system has been enlarged by just under 3mm pretty much the entire way back. The changes to the exhaust system result in a reported increase in exhaust capacity from 115 liters/second to 125 liters/second.
Starting from the intake side, the diameter of the inlet pipe leading to the air resonator has been increased from 70mm to 80mm. The throttle body has been enlarged from 60mm to 64mm. These changes are said to be responsible for an intake airflow capacity, helping the motor gulp as much as 110 liters/second (up from 95 liters/second). To allow the motor to injest this extra 15 liters per second, the intake valves have been enlarged by 1mm (to 36mm). A revised high-rpm profile on the intake camshafts results in a 0.9mm increase in valve lift and 14 degrees of extra duration (opening 2 degrees sooner, and closing 12 degrees later). Obviously, if you're burning more air and fuel, you have to do something with the spent gases. So to deal with the added volume of exhaust, the head pipe (the pipe below the 4 primaries on the header) has been enlarged from 60mm to 65mm. The catalytic converter has been spec'ed up to a higher flow rate, and behind the cat, the remainder of the exhaust system has been enlarged by just under 3mm pretty much the entire way back. The changes to the exhaust system result in a reported increase in exhaust capacity from 115 liters/second to 125 liters/second.
