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Mustang Forums
2011-2014 Mustangs
Engine/Tuning
Lets talk dynamic compression ratios
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<blockquote data-quote="cb900f" data-source="post: 13804962" data-attributes="member: 154445"><p>Maybe no one is interested, but here ya go.</p><p></p><p>Ok, I found the specs on the stock cams:</p><p></p><p>Intake Cam:</p><p>Advertised: 263</p><p>.050": 211</p><p>Lobe Lift: .235"</p><p>Centerline (Park / Max): 139 / 89</p><p></p><p>Exhaust Cam:</p><p>Advertised: 263</p><p>.050": 211</p><p>Lobe lift: .216</p><p>Centerline (Park / Max): 123 / 73</p><p></p><p>Valve events @ Park (no adv/ret) @.050":</p><p>IVO: 33.5 ATDC</p><p>IVC: 64.5 ABDC</p><p>EVO: 48.5 BBDC</p><p>EVC: 17.5 BTDC</p><p></p><p>Valve events @ Max @.050:</p><p>IVO: 16.5 BTDC</p><p>IVC: 14.5 ABDC</p><p>EVO: 1.5 ABDC</p><p>EVC: 32.5 ATDC</p><p></p><p></p><p></p><p>At Park DCR is :</p><p>Effective stroke is 2.85 inches.</p><p>Your dynamic compression ratio is 8.80:1 .</p><p></p><p>At maximum is:</p><p>Effective stroke is 3.61 inches.</p><p>Your dynamic compression ratio is 10.88:1 .</p><p></p><p>So it can adjust from 10.88 -> 8.80 </p><p></p><p>Knowing this, mine is 10.88 -> 9.92 at 7k.</p><p></p><p>That's what I needed!</p></blockquote><p></p>
[QUOTE="cb900f, post: 13804962, member: 154445"] Maybe no one is interested, but here ya go. Ok, I found the specs on the stock cams: Intake Cam: Advertised: 263 .050": 211 Lobe Lift: .235" Centerline (Park / Max): 139 / 89 Exhaust Cam: Advertised: 263 .050": 211 Lobe lift: .216 Centerline (Park / Max): 123 / 73 Valve events @ Park (no adv/ret) @.050": IVO: 33.5 ATDC IVC: 64.5 ABDC EVO: 48.5 BBDC EVC: 17.5 BTDC Valve events @ Max @.050: IVO: 16.5 BTDC IVC: 14.5 ABDC EVO: 1.5 ABDC EVC: 32.5 ATDC At Park DCR is : Effective stroke is 2.85 inches. Your dynamic compression ratio is 8.80:1 . At maximum is: Effective stroke is 3.61 inches. Your dynamic compression ratio is 10.88:1 . So it can adjust from 10.88 -> 8.80 Knowing this, mine is 10.88 -> 9.92 at 7k. That's what I needed! [/QUOTE]
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Lets talk dynamic compression ratios
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