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SVTPerformance's Chain of Restaurants
The Blower Bistro
Compression Ratio affects on supercharging
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<blockquote data-quote="RFH" data-source="post: 8523778" data-attributes="member: 35112"><p>Id say engine A would make more power. </p><p></p><p>This due to the fact that both engines will have the same peak cyinder pressure at the knock limit (for a given fuel octane amd IVC timing) but engine A will be at a higher boost level (or more specifically Pressure ratio, which is a measure of the ratio of manifold pressure to ambient pressure. which is directly correlated to airflow ). Since an SI engine runs under rich conditions and is air limited, A will be able to combust more fuel and make more power even with the higher blower power requirements. </p><p></p><p>The air density depends on wether there is an intercooler and the isentropic efficiency of the blower. 10 psia on a big blower could be a poor operating point compared to 20 psia, which could be in the sweet spot. For my guess Im assuming they are the same.</p></blockquote><p></p>
[QUOTE="RFH, post: 8523778, member: 35112"] Id say engine A would make more power. This due to the fact that both engines will have the same peak cyinder pressure at the knock limit (for a given fuel octane amd IVC timing) but engine A will be at a higher boost level (or more specifically Pressure ratio, which is a measure of the ratio of manifold pressure to ambient pressure. which is directly correlated to airflow ). Since an SI engine runs under rich conditions and is air limited, A will be able to combust more fuel and make more power even with the higher blower power requirements. The air density depends on wether there is an intercooler and the isentropic efficiency of the blower. 10 psia on a big blower could be a poor operating point compared to 20 psia, which could be in the sweet spot. For my guess Im assuming they are the same. [/QUOTE]
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SVTPerformance's Chain of Restaurants
The Blower Bistro
Compression Ratio affects on supercharging
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