Cam Specs - Hard numbers, really!(sticky, no replys)

[erioshi]

Before deciding on a set of Piper Rally cams, I did quite a bit of digging into camsaft specs. Here's a quick summary of the hard numbers I pulled together: OEM Factory EVO (8 or 9?) Advertised Duration - 260 deg Int / 256 deg Exh Effective Duration - ___ deg @ 1mm Int / ___ deg @1mm Exh Lift - 10.0mm Int / 9.5mm Exh Lobe Centerlines - 109 deg Int /111 deg Exh LSA - 110 deg Stock valve springs OK JDM EVO MR Advertised Duration - 260 deg Int / 256 deg Exh Effective Duration - ___ deg @ 1mm Int / ___ deg @1mm Exh Lift - 10.0mm Int / 9.5mm Exh Lobe Centerlines - 113 deg Int /112 deg Exh LSA - 112.5 deg Stock valve springs OK Comp Cams Comp Cams 264+ Advertised Duration - 248 deg Int / 248 deg Exh Effective Duration - ___ deg @ 1mm Int / ___ deg @1mm Exh Lift - 10.8mm Int / 10.2mm Exh Lobe Centerlines - 104 deg Int / 112 deg Exh LSA - 108 deg Upgraded valve springs recommended Comp Cams 272+ Advertised Duration - 256 deg Int / 257 deg Exh Effective Duration - ___ deg @ 1mm Int / ___ deg @1mm Exh Lift - 10.8mm Int / 10.2mm Exh Lobe Centerlines - 104 deg Int / 112 deg Exh LSA - 108 deg Upgraded valve springs recommended Comp Cams 280+ Advertised Duration - 264 deg Int / 265 deg Exh Effective Duration - ___ deg @ 1mm Int / ___ deg @1mm Exh Lift - 11.0mm Int / 10.4mm Exh Lobe Centerlines - 104 deg Int / 112 deg Exh LSA - 108 deg Upgraded valve springs recommended GSC GSC S1s - 3/29/2010 Advertised Duration - 268 deg Int / 268 deg Exh Effective Duration - 216 deg @ 1mm Int / 220 deg @ 1mm Exh Lift - 11.0mm Int / 10.5mm Exh Lobe Centerlines - 107 deg Int / 113 deg Exh LSA - 110 deg Stock valve springs OK GSC 264 Advertised Duration - 268 deg Effective Duration - 194 deg @ 1mm Lift - 10.6mm Int / 10.0mm Exh Lobe Centerlines - ___ deg Int / ___ deg Exh LSA - ___ deg Stock valve springs OK GSC 272 Advertised Duration - 281 deg Effective Duration - 203 deg @ 1mm Lift - 10.6mm Int / 10.0mm Exh Lobe Centerlines - ___ deg Int / ___ deg Exh LSA - ___ deg Stock valve springs OK HKS HKS 264 Advertised Duration - 264 deg Effective Duration - 206 deg @ 1mm Lift - 10.8mm Int / 10.2mm Exh Lobe Centerlines - 110 deg Int / 110 deg Exh LSA - 110 deg Stock valve springs OK HKS 272 Advertised Duration - 272 deg Effective Duration - 214 deg @ 1mm Lift - 10.8mm Int / 10.2mm Exh Lobe Centerlines - 110 deg Int / 110 deg Exh LSA - 110 deg Stock valve springs OK HKS 280 Advertised Duration - 280 deg Effective Duration - 222 deg @ 1mm Lift - 10.8mm Int / 10.2mm Exh Lobe Centerlines - 110 deg Int / 110 deg Exh LSA - 110 deg Stock valve springs OK JUN JUN 264 Advertised Duration - 264 deg Effective Duration - ___ deg @ 1mm Lift - 10.5mm Lobe Centerlines - ___ deg Int / ___ deg Exh LSA - ___ deg Upgraded valve springs required JUN 272 Advertised Duration - 272 deg Effective Duration - 235 deg @ 1mm Lift - 10.8mm Lobe Centerlines - 110 deg Int / 115 deg Exh LSA - 112.5 deg Upgraded valve springs required Piper Piper Ultimate Road Advertised Duration - 265 deg Effective Duration - 217 deg @1mm Int / 211 deg @1mm Exh Lift - 11.5mm Int / 10.8mm Exh Lobe Centerlines - 108 deg Int / 107 deg Exh LSA - 107.5 Upgraded valve springs required Piper Rally Advertised Duration - 265 deg Effective Duration - 217 deg @ 1mm Lift - 11.5mm Lobe Centerlines - 108 deg Int / 107 deg Exh LSA - 107.5 Upgraded valve springs required Piper Race Advertised Duration - 272 deg Effective Duration - 224 deg @ 1mm Lift - 12.0mm Lobe Centerlines - 106 deg LSA - 106 deg Upgraded valve springs required Revolver Revolver 262/264 Advertised Duration - 262 deg Int / 264 deg Exh Effective Duration - 222 deg @ 1mm Int / 223 deg @ 1mm Exh Lift - 11.4mm Int / 11.5mm Exh Lobe Centerlines - 109 deg Int / 111 deg Exh LSA - 110 deg Upgraded valve springs required Tomei Tomei Poncam Advertised Duration - 260 deg Effective Duration - ___ deg @ 1mm Lift - 10.7mm Int / 10.2mm Int Lobe Centerlines - 110 deg Int / 115 deg Exh LSA - 112.5 deg Stock valve springs OK Tomei Procam Advertised Duration - 280 deg Effective Duration - ___ deg @ 1mm Lift - 11.5mm Int / 11.5mm Exh Lobe Centerlines - 110 deg Int / 115 deg Exh LSA - 112.5 deg Upgraded valve springs required If you see only one number above instead of seperate intake and exhaust values, both cams have the same spec. If you have corrections or additions let me know and I'll update this list. We might even be able to talk a moderator into giving this thread a sticky. Info sourced from: Piper Cams UK (all Piper cams data), JUN, TOMEI and HKS websites (all all data except duration @ 1mm) Original lift @ 1mm values for HKS 272 and JUN 272 cams pulled from www.lancerregister.com EvoM member Updates: HKS 264 intake, 264 exhaust, 272 exhaust duration @ 1mm by ob4; Correction on Tomei Poncam valve spring info by Evo Ate <edit>Updated information 3/29/2010</edit>

[MR Turco]

If anyone has updates please PM me and i will update. Thanks.