Intake/Airbox
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Christian, it seems you are asking several questions about mods relating to turbo performance...
about lag...This is symptomatic of the time taken for the exhaust system driving the turbine to come to high pressure and for the turbine rotor to overcome its rotational inertia and reach the speed necessary to supply boost pressure. So the faster this pressure builds, the less lag...hence zero clearance turbos try to accomplish this by allowing less pressure loss at the contact points.
about power...Turbochargers allow an engine to burn more fuel and air by packing more into the existing cylinders. Of course as you pack more "exhaust" air in the temperature increases (increasing the possibility of early detonation or "knock") so the air is cooled with Intercoolers...ICs (to reduce heat soak and inefficient combustion). The more cool air and fuel (less prone to early detonation i.e., higher octane) the more POWER (better combustion). So critical components include volume of air, fuel octane, temperature of air and environmental factors. Improving air flow (P&P headers, improving cold air intake, straight pipes or better exhaust system) will ultimately improve combustion and power. How much is clearly debatable...whether you will know the difference???There is of course environmental factors that come into consideration...ambient temperatures, barometric pressure, humidity, altitude all play a part.
about lag...This is symptomatic of the time taken for the exhaust system driving the turbine to come to high pressure and for the turbine rotor to overcome its rotational inertia and reach the speed necessary to supply boost pressure. So the faster this pressure builds, the less lag...hence zero clearance turbos try to accomplish this by allowing less pressure loss at the contact points.
about power...Turbochargers allow an engine to burn more fuel and air by packing more into the existing cylinders. Of course as you pack more "exhaust" air in the temperature increases (increasing the possibility of early detonation or "knock") so the air is cooled with Intercoolers...ICs (to reduce heat soak and inefficient combustion). The more cool air and fuel (less prone to early detonation i.e., higher octane) the more POWER (better combustion). So critical components include volume of air, fuel octane, temperature of air and environmental factors. Improving air flow (P&P headers, improving cold air intake, straight pipes or better exhaust system) will ultimately improve combustion and power. How much is clearly debatable...whether you will know the difference???There is of course environmental factors that come into consideration...ambient temperatures, barometric pressure, humidity, altitude all play a part.
Last edited by wross996TT; Nov 12, 2007 at 03:46 PM.
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