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The Terminator
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safe boost levels
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<blockquote data-quote="tt335ci03cobra" data-source="post: 16221740" data-attributes="member: 68944"><p>Id stay under 10psi until it’s tuned up nice.</p><p></p><p>Once it’s tuned up, stay 15psi or under it it’s stock heads/cams/ and under 9.3/1 compression. </p><p></p><p>Use fuel tables if you have head and cam work done to see how much fuel you can command. You likely can’t run much over 12psi on pump gas if you have a stage 3 head and cam package. </p><p></p><p>Boost is a measure of restriction. 15psi with a fully ported head and a single 80 is a metric **** ton of oxygen to ignite. 15psi through a stock c head and 76mm is about 33% less oxygen to work with to give you an idea.</p><p></p><p>Another example is a stock Eaton m112 at 15psi is not all that much cfm. A 2.65 whipple at 15psi is a lot more, and a 4.0L whipper at 15psi is more still.</p><p></p><p>15psi in a 1/2” garden hose is a decent amount of air. 15psi in a 3” fire hose is a lot more air. </p><p></p><p>Engines make power by igniting fuel and oxygen. The bigger and faster the boom, the faster/quicker the rotating assembly will reach peak rpm and necessitate gear changes to leverage the available power.</p></blockquote><p></p>
[QUOTE="tt335ci03cobra, post: 16221740, member: 68944"] Id stay under 10psi until it’s tuned up nice. Once it’s tuned up, stay 15psi or under it it’s stock heads/cams/ and under 9.3/1 compression. Use fuel tables if you have head and cam work done to see how much fuel you can command. You likely can’t run much over 12psi on pump gas if you have a stage 3 head and cam package. Boost is a measure of restriction. 15psi with a fully ported head and a single 80 is a metric **** ton of oxygen to ignite. 15psi through a stock c head and 76mm is about 33% less oxygen to work with to give you an idea. Another example is a stock Eaton m112 at 15psi is not all that much cfm. A 2.65 whipple at 15psi is a lot more, and a 4.0L whipper at 15psi is more still. 15psi in a 1/2” garden hose is a decent amount of air. 15psi in a 3” fire hose is a lot more air. Engines make power by igniting fuel and oxygen. The bigger and faster the boom, the faster/quicker the rotating assembly will reach peak rpm and necessitate gear changes to leverage the available power. [/QUOTE]
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