Cam Specs - Hard numbers, really!(sticky, no replys)
#1
Cam Specs - Hard numbers, really!
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>
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>
Last edited by MR Turco; Mar 29, 2010 at 06:45 PM.
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