Cam Specs - Hard numbers, really!
#1
Cam Specs - Hard numbers, really!(sticky, no replys)
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:
HKS 264:
Duration of 264 deg
Duration of 206 deg @ 1mm
Lift of 10.8mm intake / 10.2mm exhaust
Stock valve springs OK
HKS 272:
Duration of 272 deg
Duration of 214 deg @ 1mm
Lift of 10.8mm intake / 10.2mm exhaust
Stock valve springs OK
JUN 264:
Duration of 264 deg
Duration of ___ deg @ 1mm
Lift of 10.5mm
Upgraded valve springs required
JUN 272:
Duration of 272 deg
Duration of 235 deg @ 1mm
Lift of 10.8mm
Upgraded valve springs required
Tomei Poncam:
Duration of 260 deg
Duration of ___ deg @ 1mm
Lift of 10.7mm intake / 10.2mm exhaust
Stock valve springs OK
Tomei Procam:
Duration of 260 deg
Duration of ___ deg @ 1mm
Lift of 11.5mm
Upgraded valve springs required
Piper Ultimate Road cams:
Duration of 265 deg
Duration of 217 deg intake / 211 deg exhaust @ 1mm
Lift of 11.5mm intake / 10.8mm exhaust
Upgraded valve springs required
Piper Rally cams:
Duration of 265 deg
Duration of 217 deg @ 1mm
Lift of 11.5mm
Upgraded valve springs required
Piper Race cams:
Duration of 272 deg
Duration of 224 deg @ 1mm
Lift of 12.0mm
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
HKS 264:
Duration of 264 deg
Duration of 206 deg @ 1mm
Lift of 10.8mm intake / 10.2mm exhaust
Stock valve springs OK
HKS 272:
Duration of 272 deg
Duration of 214 deg @ 1mm
Lift of 10.8mm intake / 10.2mm exhaust
Stock valve springs OK
JUN 264:
Duration of 264 deg
Duration of ___ deg @ 1mm
Lift of 10.5mm
Upgraded valve springs required
JUN 272:
Duration of 272 deg
Duration of 235 deg @ 1mm
Lift of 10.8mm
Upgraded valve springs required
Tomei Poncam:
Duration of 260 deg
Duration of ___ deg @ 1mm
Lift of 10.7mm intake / 10.2mm exhaust
Stock valve springs OK
Tomei Procam:
Duration of 260 deg
Duration of ___ deg @ 1mm
Lift of 11.5mm
Upgraded valve springs required
Piper Ultimate Road cams:
Duration of 265 deg
Duration of 217 deg intake / 211 deg exhaust @ 1mm
Lift of 11.5mm intake / 10.8mm exhaust
Upgraded valve springs required
Piper Rally cams:
Duration of 265 deg
Duration of 217 deg @ 1mm
Lift of 11.5mm
Upgraded valve springs required
Piper Race cams:
Duration of 272 deg
Duration of 224 deg @ 1mm
Lift of 12.0mm
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
Last edited by erioshi; Jul 2, 2004 at 01:12 PM.
#4
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i just got the hks 264 intake cam spec in front of me.
duration @ 1mm is 206 degress for 264 intake cam.
opens @ 5 degree btdc
max lift @ 110 degrees atdc
closes @ 31 degree abdc
hope this help.
-ob4
duration @ 1mm is 206 degress for 264 intake cam.
opens @ 5 degree btdc
max lift @ 110 degrees atdc
closes @ 31 degree abdc
hope this help.
-ob4
#5
Originally Posted by 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:
HKS 264:
Duration of 264 deg
Duration of ??? deg @ 1mm
Lift of 10.8mm intake and 10.2mm exhaust
Stock valve springs OK
HKS 272:
Duration of 272 deg
Duration of 215 deg @ 1mm
Lift of 10.8mm intake and 10.2mm exhaust
Stock valve springs OK
JUN 264:
Duration of 264 deg
Duration of ??? deg @ 1mm
Lift of 10.5mm
Upgraded valve springs required
JUN 272:
Duration of 272 deg
Duration of 235 deg @ 1mm
Lift of 10.8mm
Upgraded valve springs required
Tomei Poncam:
Duration of 260 deg
Duration of ??? deg @ 1mm
Lift of 10.7mm intake and 10.2mm exhaust
Upgraded valve springs required
Tomei Procam:
Duration of 260 deg
Duration of ??? deg @ 1mm
Lift of 11.5mm
Upgraded valve springs required
Piper Ultimate Road cams:
Duration of 265 deg
Duration of 217 deg intake and 211 deg exhaust @ 1mm
Lift of 11.5mm intake and 10.8mm exhaust
Upgraded valve springs required
Piper Rally cams:
Duration of 265 deg
Duration of 217 deg @ 1mm
Lift of 11.5mm
Upgraded valve springs required
Piper Race cams:
Duration of 272 deg
Duration of 224 deg @ 1mm
Lift of 12.0mm
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.
HKS 264:
Duration of 264 deg
Duration of ??? deg @ 1mm
Lift of 10.8mm intake and 10.2mm exhaust
Stock valve springs OK
HKS 272:
Duration of 272 deg
Duration of 215 deg @ 1mm
Lift of 10.8mm intake and 10.2mm exhaust
Stock valve springs OK
JUN 264:
Duration of 264 deg
Duration of ??? deg @ 1mm
Lift of 10.5mm
Upgraded valve springs required
JUN 272:
Duration of 272 deg
Duration of 235 deg @ 1mm
Lift of 10.8mm
Upgraded valve springs required
Tomei Poncam:
Duration of 260 deg
Duration of ??? deg @ 1mm
Lift of 10.7mm intake and 10.2mm exhaust
Upgraded valve springs required
Tomei Procam:
Duration of 260 deg
Duration of ??? deg @ 1mm
Lift of 11.5mm
Upgraded valve springs required
Piper Ultimate Road cams:
Duration of 265 deg
Duration of 217 deg intake and 211 deg exhaust @ 1mm
Lift of 11.5mm intake and 10.8mm exhaust
Upgraded valve springs required
Piper Rally cams:
Duration of 265 deg
Duration of 217 deg @ 1mm
Lift of 11.5mm
Upgraded valve springs required
Piper Race cams:
Duration of 272 deg
Duration of 224 deg @ 1mm
Lift of 12.0mm
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.
May I know where did you get the specs for the Jun 272 cams? Mine is set at 110 and 115. does that make the duration 225? confused
#6
Thanks everyone! Keep the updates comming.
I had talked with works directly a few months ago and they didn't want to disclose their exact data to me back then.
I know both Comp and Crower either have released or will be releasing Evo cams; I haven't had time to track down that data.
The figure for the duration on the JUN 272 cams came from www.lancerregiser.com. One of the builders/tuners there had posted that figure.
I didn't have much luck with emails to the companies when originally trying to source this information. I suppose I could try again. Piper was an exception, they provided a spreadsheet with complete specs that covered their entire Evo cam line; it even included specs for their solid lifter cams.
I had talked with works directly a few months ago and they didn't want to disclose their exact data to me back then.
I know both Comp and Crower either have released or will be releasing Evo cams; I haven't had time to track down that data.
The figure for the duration on the JUN 272 cams came from www.lancerregiser.com. One of the builders/tuners there had posted that figure.
I didn't have much luck with emails to the companies when originally trying to source this information. I suppose I could try again. Piper was an exception, they provided a spreadsheet with complete specs that covered their entire Evo cam line; it even included specs for their solid lifter cams.
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#10
Thanks - I purchased my Piper cams from Mark at Quantum Racing. The website is www.quantum-racing.com.
Update: Crane Cams and Comp Cams both list 4g63 applications on their website, but nothing Evo specific.
Update: Crane Cams and Comp Cams both list 4g63 applications on their website, but nothing Evo specific.
Last edited by erioshi; Jun 29, 2004 at 10:02 PM.
#11
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My hks 272 exhaust just came in today. So here is the specs. They also give me the specs for the 264 exhaust specs.
hks 264 exhaust:
duration @1mm: 206*
open: 30* bbdc
close: 4* afdc
max lift: 110* atdc
hks 272 exhaust:
duration @1mm: 214*
open: 34* bbdc
close: 0* (tdc)
max lift: 110* atdc
hks 264 exhaust:
duration @1mm: 206*
open: 30* bbdc
close: 4* afdc
max lift: 110* atdc
hks 272 exhaust:
duration @1mm: 214*
open: 34* bbdc
close: 0* (tdc)
max lift: 110* atdc
#12
Thanks for the info! I'll see if I can track down the missing "duration @ 1mm" figures for the other cams.
Is there any other info you'd like to se added to this thread?
Is there any other info you'd like to se added to this thread?