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SN-95 and New Edge Mustangs
5.4 DOHC build questions
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<blockquote data-quote="Sluggie24" data-source="post: 15580719" data-attributes="member: 184003"><p>The block itself might tell you if it needs to be bored when checked. Since you're buying pistons anyway I'd say just punch it .020 over and be done.</p><p></p><p>I can't speak to compression since that is really going to depend on how much boost you want to run and supercharger type.</p><p></p><p>There are many good pistons out there. You should spend time researching online which ones match your power needs and budget.</p><p></p><p>Look at what the cam manufacturers offer and call a few up to find the best ones for your combo.</p><p></p><p>If you will have the heads off port them, polish the chambers and give them a valve job with quality valves and hardware. I don't know if bigger would yield big power gains but if you are putting new ones in anyway won't hurt to bump the size. </p><p></p><p>Gas is up to you but E85 will allow more aggressive timing and more power.</p><p></p><p>You will have to do the calculations to figure out injector size once you figure your combo and fuel type out.</p><p></p><p>I'd also say go with a positive displacement blower to ensure the injectors spray into the runners properly. Using a 4.6 intake with adapters causes issues due to the angle change.</p></blockquote><p></p>
[QUOTE="Sluggie24, post: 15580719, member: 184003"] The block itself might tell you if it needs to be bored when checked. Since you're buying pistons anyway I'd say just punch it .020 over and be done. I can't speak to compression since that is really going to depend on how much boost you want to run and supercharger type. There are many good pistons out there. You should spend time researching online which ones match your power needs and budget. Look at what the cam manufacturers offer and call a few up to find the best ones for your combo. If you will have the heads off port them, polish the chambers and give them a valve job with quality valves and hardware. I don't know if bigger would yield big power gains but if you are putting new ones in anyway won't hurt to bump the size. Gas is up to you but E85 will allow more aggressive timing and more power. You will have to do the calculations to figure out injector size once you figure your combo and fuel type out. I'd also say go with a positive displacement blower to ensure the injectors spray into the runners properly. Using a 4.6 intake with adapters causes issues due to the angle change. [/QUOTE]
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5.4 DOHC build questions
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