Chino886
05-01-2008, 08:50 PM
Here is some cam information for all of those who miss it (Thanks Sredish from "another site")!
The Honda, and Hot cams are drop in cams which mean you can swap them out with out changing anything else. With the Megacycle and WEB cams you may need to change valve springs, cut valve guides, cut valve reliefs in the top of your piston depending on which one you choose.
Honda Cams
Honda 2004-2005 HRC Cam - Part # 14110-NLZ-650
Really strong to top end cam, with a decent mid range, but lacks bottom end.
Intake Lift(inches): .390
Exhaust Lift(inches): .350
Intake Lobe Center (degrees): 110
Exhaust Lobe Center (degrees): 105
Intake Duration (degrees at .040"): 264
Exhaust Duration (degrees at .040"): 268
Intake Open / Close: 22 btc/62 abc
Exhaust Open / Close: 59 bbc/29 atc
Lobe Separation Angle: 107.5
Overlap: 51
Honda 2002 CRF Cam - Part # 14110-MEB-670
A good all around cam, strong bottom and really strong mid range with a decent top end as well.
Intake Lift(inches): .380"
Exhaust Lift(inches): .356"
Intake Lobe Center (degrees): 106.5
Exhaust Lobe Center (degrees): 107
Intake Duration (degrees at .040"): 249
Exhaust Duration (degrees at .040"): 272
Intake Open / Close: 18 btc/51 abc
Exhaust Open / Close: 63 bbc/29 atc
Lobe Separation Angle: 106.75
Overlap: 47
Honda 2003 CRF Cam - 14110-MEB-770
A good mid range cam.
Intake Lift(inches): .380"
Exhaust Lift(inches): .336"
Intake Lobe Center (degrees): 109
Exhaust Lobe Center (degrees): 109
Intake Duration (degrees at .040"): 249
Exhaust Duration (degrees at .040"): 262
Intake Open / Close: 15.5 btc/53.5 abc
Exhaust Open / Close: 60 bbc/22 atc
Lobe Separation Angle: 109
Overlap: 37.5
Honda 2006-2007 HRC / 2004 - 2006 CRF - Part # 14110-NLZ-610 (CRF Part # 14110-MEN-670)
Really strong bottom with a decent mid range.
Intake Lift(inches): .374"
Exhaust Lift(inches): .313"
Intake Lobe Center (degrees): 248
Exhaust Lobe Center (degrees): 268
Intake Duration (degrees at .040"):
Exhaust Duration (degrees at .040"):
HotCams
HotCams Stage 1 - Part #1016-1
Excellent bottom end and midrange increase.
Intake lift (inches): .378"
Exhaust lift (inches): .343"
Intake lobe center (degrees): 106.5
Exhaust lobe center (degrees): 103.5
Intake duration (degrees at 1mm): 237.5
Exhaust duration (degrees at 1mm): 268.5
Lobe Separation Angle: 110
Overlap: 33
HotCams Stage 2 - Part #1024-2
Excellent midrange and top end increase, good all-around cam.
Intake lift (inches): .402"
Exhaust lift (inches): .343"
Intake lobe center (degrees): 106.5
Exhaust lobe center (degrees): 103.5
Intake duration (degrees at 1mm): 248
Exhaust duration (degrees at 1mm): 268.5
Intake Open / Close: 11 btc/ 53abc
Exhaust Open / Close: 55 bbc/23 atc
Lobe Separation Angle: 105
Overlap: 38.25
HotCams Stage 3 - Part # 1056-3
More top-end power than Stage 2. Will work well for TT and big bore/strokers.
Intake lift (inches): .409"
Exhaust lift (inches): .356"
Intake lobe center (degrees): 116
Exhaust lobe center (degrees): 104.5
Intake duration (degrees at 1mm): 251.5
Exhaust duration (degrees at 1mm): 265
Intake Open / Close: 10 btc/62abc
Exhaust Open / Close: 57 bbc/28 atc
Lobe Separation Angle: 110.25
Overlap: 37.75
Megacycle Cams
Megacycle X1 - Part # 108-x1
Race profile for increased mid to top end, must use race piston and valve springs. Intake valve pocket may need cut on piston.
Intake Lift(inches): .430"
Exhaust Lift(inches): .385"
Intake Lobe Center (degrees): 102
Exhaust Lobe Center (degrees): 106
Intake Duration (degrees at .040"): 266
Exhaust Duration (degrees at .040"): 282
Intake Open / Close: 31 btc/ 55abc
Exhaust Open / Close: 67 bbc/35 atc
Lobe Separation Angle: 104
Overlap: 66
Megacycle X2 - Part # 108-x2
Strong midrange / all-around. Must use race piston and valve springs. Intake valve pocket may need cut on piston
Intake Lift(inches): .412"
Exhaust Lift(inches): .350"
Intake Lobe Center (degrees): 108
Exhaust Lobe Center (degrees): 108
Intake Duration (degrees at .040"): 260
Exhaust Duration (degrees at .040"): 268
Intake Open / Close: 22 btc/58 abc
Exhaust Open / Close: 62 bbc/26 atc
Lobe Separation Angle: 108
Overlap: 48
Megacycle X3 - Part # 108-x3
Full race cam max top end. Must use race piston and valve springs. Intake valve pocket may need cut on piston.
Intake Lift(inches): .435"
Exhaust Lift(inches): .385"
Intake Lobe Center (degrees): 104
Exhaust Lobe Center (degrees): 108
Intake Duration (degrees at .040"): 276
Exhaust Duration (degrees at .040"): 276
Intake Open / Close: 34 btc/62 abc
Exhaust Open / Close: 66 bbc/30 atc
Lobe Separation Angle: 106
Overlap: 64
WEB Cam Inc.
613/812 - Part # 57-102
Performance profile to increase mid and upper end power. Higher compression recommended. Must be used with performance spring kit shortened valve guides and adjustable cam gears.
Intake Lift(inches): .381"
Exhaust Lift(inches): .357"
Intake Lobe Center (degrees):
Exhaust Lobe Center (degrees):
Intake Duration (degrees at .050"): 240
Exhaust Duration (degrees at .050"): 258
493/729 - Part # 55-462 Reduced Base Circle
Performance profile to increase mid and upper end power. Higher compression recommended. Must be used with performance spring kit shortened valve guides and adjustable cam gears.
Intake Lift(inches): .415"
Exhaust Lift(inches): .340"
Intake Lobe Center (degrees): ...
Exhaust Lobe Center (degrees): ...
Intake Duration (degrees at .050"): 252
Exhaust Duration (degrees at .050"): 252
493/739 - Part #
Performance profile to increase mid and upper end power. Higher compression recommended. Must be used with performance spring kit shortened valve guides and adjustable cam gears.
Intake Lift(inches): .415"
Exhaust Lift(inches): .410"
Intake Lobe Center (degrees): 110
Exhaust Lobe Center (degrees): 104
Intake Duration (degrees at .050"): 276
Exhaust Duration (degrees at .050"): 276
Intake Open / Close: 16 btc/48 abc
Exhaust Open / Close: 56 bbc/20 atc
Lobe Separation Angle: 107
Overlap: 62
208/921 - Part # 57-042 Reduced or Full Base Circle
Race profile. Higher compression required. Must use performance spring kit, shortened valve guides and adjustable cam gear.
Intake Lift(inches): .408"
Exhaust Lift(inches): .340"
Intake Lobe Center (degrees):
Exhaust Lobe Center (degrees):
Intake Duration (degrees at .050"): 282
Exhaust Duration (degrees at .050"): 298
Intake Open / Close: 19 btc/ 59abc
Exhaust Open / Close: 55 bbc/27 atc
Mysto - Part # 57-072 Reduced Base Circle
The "MYSTO" cam designed for race use ONLY. Higher compression required. Must use performance spring kit, shortened valve guides and adjustable cam gear. Check all clearances!
Intake Lift(inches): .432"
Exhaust Lift(inches): .350"
Intake Lobe Center (degrees):
Exhaust Lobe Center (degrees):
Intake Duration (degrees at .050"): 293
Exhaust Duration (degrees at .050"): 296
Intake Open / Close: 20 btc/ 60abc
Exhaust Open / Close: 54 bbc/26 atc
Johnson Cams
400 - 375 (Little Johnson)
Strong midrange and top end.
Intake Lift(inches): .400"
Exhaust Lift(inches): .375"
Intake Lobe Center (degrees): 108
Exhaust Lobe Center (degrees): 108
Intake Duration (degrees at .040"): 266
Exhaust Duration (degrees at .040"): 284
Intake Open / Close: 26°btc / 60°abc
Exhaust Open / Close: 71°bbc / 34°atc
Lobe Seperation Angle: 108
Overlap: 59
430 - 400 (Big Johnson)
Top end drag cam.
Intake Lift(inches): .430"
Exhaust Lift(inches): .400"
Intake Lobe Center (degrees): 110
Exhaust Lobe Center (degrees): 110
Intake Duration (degrees at .040"): 274
Exhaust Duration (degrees at .040"): 289
Intake Open / Close: 28°btc / 66°abc
Exhaust Open / Close: 74°bbc / 35°atc
Lobe Separation Angle: 110
Overlap: 61.5
Crower Cams
G2 - Part # H04-450-400 Reduced Base Circle
Increases in midrange and top end.
Intake Lift(inches): .400
Exhaust Lift(inches): .394
Intake Lobe Center (degrees):
Exhaust Lobe Center (degrees):
Intake Duration (degrees at .040"): 254
Exhaust Duration (degrees at .040"): 254
-------------------------------------------------------------------------------------------------------------------------------------------------
Cam Terms
BDC (Bottom Dead Center): Point where piston is at the lowest point of it's rotation; measured in degrees.
Base Circle: The round portion of the cam lobe where the valve lash measurement is taken; the base from where the lobe dies into.
Cam Lobe: The part of the camshaft that performs the lift of the valve.
Duration: The length of time that the valve is held off the seat by the cam. This is measured by the degrees that the crankshaft rotates. Lower duration cams produce the power in the lower RPM range. Larger duration cams operate at higher RPM, but you will lose bottom end power to gain top end power as the duration is increased.
Lobe Center: The distance measured in degrees between the centerline of the intake lobe and the centerline of the exhaust lobe in the same cylinder.
Lobe Separation Angle (LSA): The Lobe Separation Angle is the degrees that the crankshaft rotates BETWEEN the exhaust valve’s maximum lift point (Exhaust Lobe Center) and the intake valve’s maximum lift point (Intake Lobe Center). This separation generally determines where peak torque will occur within the engine's power range. Tight lobe separations cause the torque to build earlier in the RPM range of the cam. The torque will be concentrated, build quickly and peak out. Broader lobe separations allow the torque to be spread over a broader portion of the RPM range to produce better power through the upper RPM.
LSA Formula = Intake Lobe Center + Exhaust Lobe Center / 2 (the average of the 2 lobe centers).
Overlap: The point where both the intake and exhaust valves are open at the same time.
Overlap Formula = Intake Duration + Exhaust Duration /4 - LSA x 2 , or Add the intake opening to the exhaust closing.
Piston - Valve Clearance: The closest distance from the piston to the valves during the rotation of the piston through TDC, measured in thousandths.
Ramp Rate: The speed that the valve opens and closes.
TDC (Top Dead Center): Point where piston is at the highest point of it's rotation, closest to combustion chamber; measured in degrees.
Valve Float: When the speed of the engine is too great for the valve springs to control the valve, from fatigued springs, over revving the motor or a combination. The valves will stay open and/or "bounce" on their seats.
Valve Lash / Clearance: The clearance between the base circle of the camshaft and the valve bucket / rocker arm or tappet.
Valve Opening and Closing Angles: The angles (usually measured in crankshaft degrees) when the valves first leave and then return to their seats.
Valvetrain: The "train" of parts leading from the cam lobe to the valve.
1. Max Lift or Nose
2. Flank
3. Opening Clearance Ramp
4. Closing Clearance Ramp
5. Base Circle
6. Exhaust Opening Timing Figure
7. Exhaust Closing Timing Figure
8. Intake Opening Timing Figure
9. Intake Closing Timing Figure
10. Intake to Exhaust Lobe Separation
If anyone sees a mistake or would like another cam added to the list, please PM me the info and I'll get it up ASAP.
Thanks,
Scott
The Honda, and Hot cams are drop in cams which mean you can swap them out with out changing anything else. With the Megacycle and WEB cams you may need to change valve springs, cut valve guides, cut valve reliefs in the top of your piston depending on which one you choose.
Honda Cams
Honda 2004-2005 HRC Cam - Part # 14110-NLZ-650
Really strong to top end cam, with a decent mid range, but lacks bottom end.
Intake Lift(inches): .390
Exhaust Lift(inches): .350
Intake Lobe Center (degrees): 110
Exhaust Lobe Center (degrees): 105
Intake Duration (degrees at .040"): 264
Exhaust Duration (degrees at .040"): 268
Intake Open / Close: 22 btc/62 abc
Exhaust Open / Close: 59 bbc/29 atc
Lobe Separation Angle: 107.5
Overlap: 51
Honda 2002 CRF Cam - Part # 14110-MEB-670
A good all around cam, strong bottom and really strong mid range with a decent top end as well.
Intake Lift(inches): .380"
Exhaust Lift(inches): .356"
Intake Lobe Center (degrees): 106.5
Exhaust Lobe Center (degrees): 107
Intake Duration (degrees at .040"): 249
Exhaust Duration (degrees at .040"): 272
Intake Open / Close: 18 btc/51 abc
Exhaust Open / Close: 63 bbc/29 atc
Lobe Separation Angle: 106.75
Overlap: 47
Honda 2003 CRF Cam - 14110-MEB-770
A good mid range cam.
Intake Lift(inches): .380"
Exhaust Lift(inches): .336"
Intake Lobe Center (degrees): 109
Exhaust Lobe Center (degrees): 109
Intake Duration (degrees at .040"): 249
Exhaust Duration (degrees at .040"): 262
Intake Open / Close: 15.5 btc/53.5 abc
Exhaust Open / Close: 60 bbc/22 atc
Lobe Separation Angle: 109
Overlap: 37.5
Honda 2006-2007 HRC / 2004 - 2006 CRF - Part # 14110-NLZ-610 (CRF Part # 14110-MEN-670)
Really strong bottom with a decent mid range.
Intake Lift(inches): .374"
Exhaust Lift(inches): .313"
Intake Lobe Center (degrees): 248
Exhaust Lobe Center (degrees): 268
Intake Duration (degrees at .040"):
Exhaust Duration (degrees at .040"):
HotCams
HotCams Stage 1 - Part #1016-1
Excellent bottom end and midrange increase.
Intake lift (inches): .378"
Exhaust lift (inches): .343"
Intake lobe center (degrees): 106.5
Exhaust lobe center (degrees): 103.5
Intake duration (degrees at 1mm): 237.5
Exhaust duration (degrees at 1mm): 268.5
Lobe Separation Angle: 110
Overlap: 33
HotCams Stage 2 - Part #1024-2
Excellent midrange and top end increase, good all-around cam.
Intake lift (inches): .402"
Exhaust lift (inches): .343"
Intake lobe center (degrees): 106.5
Exhaust lobe center (degrees): 103.5
Intake duration (degrees at 1mm): 248
Exhaust duration (degrees at 1mm): 268.5
Intake Open / Close: 11 btc/ 53abc
Exhaust Open / Close: 55 bbc/23 atc
Lobe Separation Angle: 105
Overlap: 38.25
HotCams Stage 3 - Part # 1056-3
More top-end power than Stage 2. Will work well for TT and big bore/strokers.
Intake lift (inches): .409"
Exhaust lift (inches): .356"
Intake lobe center (degrees): 116
Exhaust lobe center (degrees): 104.5
Intake duration (degrees at 1mm): 251.5
Exhaust duration (degrees at 1mm): 265
Intake Open / Close: 10 btc/62abc
Exhaust Open / Close: 57 bbc/28 atc
Lobe Separation Angle: 110.25
Overlap: 37.75
Megacycle Cams
Megacycle X1 - Part # 108-x1
Race profile for increased mid to top end, must use race piston and valve springs. Intake valve pocket may need cut on piston.
Intake Lift(inches): .430"
Exhaust Lift(inches): .385"
Intake Lobe Center (degrees): 102
Exhaust Lobe Center (degrees): 106
Intake Duration (degrees at .040"): 266
Exhaust Duration (degrees at .040"): 282
Intake Open / Close: 31 btc/ 55abc
Exhaust Open / Close: 67 bbc/35 atc
Lobe Separation Angle: 104
Overlap: 66
Megacycle X2 - Part # 108-x2
Strong midrange / all-around. Must use race piston and valve springs. Intake valve pocket may need cut on piston
Intake Lift(inches): .412"
Exhaust Lift(inches): .350"
Intake Lobe Center (degrees): 108
Exhaust Lobe Center (degrees): 108
Intake Duration (degrees at .040"): 260
Exhaust Duration (degrees at .040"): 268
Intake Open / Close: 22 btc/58 abc
Exhaust Open / Close: 62 bbc/26 atc
Lobe Separation Angle: 108
Overlap: 48
Megacycle X3 - Part # 108-x3
Full race cam max top end. Must use race piston and valve springs. Intake valve pocket may need cut on piston.
Intake Lift(inches): .435"
Exhaust Lift(inches): .385"
Intake Lobe Center (degrees): 104
Exhaust Lobe Center (degrees): 108
Intake Duration (degrees at .040"): 276
Exhaust Duration (degrees at .040"): 276
Intake Open / Close: 34 btc/62 abc
Exhaust Open / Close: 66 bbc/30 atc
Lobe Separation Angle: 106
Overlap: 64
WEB Cam Inc.
613/812 - Part # 57-102
Performance profile to increase mid and upper end power. Higher compression recommended. Must be used with performance spring kit shortened valve guides and adjustable cam gears.
Intake Lift(inches): .381"
Exhaust Lift(inches): .357"
Intake Lobe Center (degrees):
Exhaust Lobe Center (degrees):
Intake Duration (degrees at .050"): 240
Exhaust Duration (degrees at .050"): 258
493/729 - Part # 55-462 Reduced Base Circle
Performance profile to increase mid and upper end power. Higher compression recommended. Must be used with performance spring kit shortened valve guides and adjustable cam gears.
Intake Lift(inches): .415"
Exhaust Lift(inches): .340"
Intake Lobe Center (degrees): ...
Exhaust Lobe Center (degrees): ...
Intake Duration (degrees at .050"): 252
Exhaust Duration (degrees at .050"): 252
493/739 - Part #
Performance profile to increase mid and upper end power. Higher compression recommended. Must be used with performance spring kit shortened valve guides and adjustable cam gears.
Intake Lift(inches): .415"
Exhaust Lift(inches): .410"
Intake Lobe Center (degrees): 110
Exhaust Lobe Center (degrees): 104
Intake Duration (degrees at .050"): 276
Exhaust Duration (degrees at .050"): 276
Intake Open / Close: 16 btc/48 abc
Exhaust Open / Close: 56 bbc/20 atc
Lobe Separation Angle: 107
Overlap: 62
208/921 - Part # 57-042 Reduced or Full Base Circle
Race profile. Higher compression required. Must use performance spring kit, shortened valve guides and adjustable cam gear.
Intake Lift(inches): .408"
Exhaust Lift(inches): .340"
Intake Lobe Center (degrees):
Exhaust Lobe Center (degrees):
Intake Duration (degrees at .050"): 282
Exhaust Duration (degrees at .050"): 298
Intake Open / Close: 19 btc/ 59abc
Exhaust Open / Close: 55 bbc/27 atc
Mysto - Part # 57-072 Reduced Base Circle
The "MYSTO" cam designed for race use ONLY. Higher compression required. Must use performance spring kit, shortened valve guides and adjustable cam gear. Check all clearances!
Intake Lift(inches): .432"
Exhaust Lift(inches): .350"
Intake Lobe Center (degrees):
Exhaust Lobe Center (degrees):
Intake Duration (degrees at .050"): 293
Exhaust Duration (degrees at .050"): 296
Intake Open / Close: 20 btc/ 60abc
Exhaust Open / Close: 54 bbc/26 atc
Johnson Cams
400 - 375 (Little Johnson)
Strong midrange and top end.
Intake Lift(inches): .400"
Exhaust Lift(inches): .375"
Intake Lobe Center (degrees): 108
Exhaust Lobe Center (degrees): 108
Intake Duration (degrees at .040"): 266
Exhaust Duration (degrees at .040"): 284
Intake Open / Close: 26°btc / 60°abc
Exhaust Open / Close: 71°bbc / 34°atc
Lobe Seperation Angle: 108
Overlap: 59
430 - 400 (Big Johnson)
Top end drag cam.
Intake Lift(inches): .430"
Exhaust Lift(inches): .400"
Intake Lobe Center (degrees): 110
Exhaust Lobe Center (degrees): 110
Intake Duration (degrees at .040"): 274
Exhaust Duration (degrees at .040"): 289
Intake Open / Close: 28°btc / 66°abc
Exhaust Open / Close: 74°bbc / 35°atc
Lobe Separation Angle: 110
Overlap: 61.5
Crower Cams
G2 - Part # H04-450-400 Reduced Base Circle
Increases in midrange and top end.
Intake Lift(inches): .400
Exhaust Lift(inches): .394
Intake Lobe Center (degrees):
Exhaust Lobe Center (degrees):
Intake Duration (degrees at .040"): 254
Exhaust Duration (degrees at .040"): 254
-------------------------------------------------------------------------------------------------------------------------------------------------
Cam Terms
BDC (Bottom Dead Center): Point where piston is at the lowest point of it's rotation; measured in degrees.
Base Circle: The round portion of the cam lobe where the valve lash measurement is taken; the base from where the lobe dies into.
Cam Lobe: The part of the camshaft that performs the lift of the valve.
Duration: The length of time that the valve is held off the seat by the cam. This is measured by the degrees that the crankshaft rotates. Lower duration cams produce the power in the lower RPM range. Larger duration cams operate at higher RPM, but you will lose bottom end power to gain top end power as the duration is increased.
Lobe Center: The distance measured in degrees between the centerline of the intake lobe and the centerline of the exhaust lobe in the same cylinder.
Lobe Separation Angle (LSA): The Lobe Separation Angle is the degrees that the crankshaft rotates BETWEEN the exhaust valve’s maximum lift point (Exhaust Lobe Center) and the intake valve’s maximum lift point (Intake Lobe Center). This separation generally determines where peak torque will occur within the engine's power range. Tight lobe separations cause the torque to build earlier in the RPM range of the cam. The torque will be concentrated, build quickly and peak out. Broader lobe separations allow the torque to be spread over a broader portion of the RPM range to produce better power through the upper RPM.
LSA Formula = Intake Lobe Center + Exhaust Lobe Center / 2 (the average of the 2 lobe centers).
Overlap: The point where both the intake and exhaust valves are open at the same time.
Overlap Formula = Intake Duration + Exhaust Duration /4 - LSA x 2 , or Add the intake opening to the exhaust closing.
Piston - Valve Clearance: The closest distance from the piston to the valves during the rotation of the piston through TDC, measured in thousandths.
Ramp Rate: The speed that the valve opens and closes.
TDC (Top Dead Center): Point where piston is at the highest point of it's rotation, closest to combustion chamber; measured in degrees.
Valve Float: When the speed of the engine is too great for the valve springs to control the valve, from fatigued springs, over revving the motor or a combination. The valves will stay open and/or "bounce" on their seats.
Valve Lash / Clearance: The clearance between the base circle of the camshaft and the valve bucket / rocker arm or tappet.
Valve Opening and Closing Angles: The angles (usually measured in crankshaft degrees) when the valves first leave and then return to their seats.
Valvetrain: The "train" of parts leading from the cam lobe to the valve.
1. Max Lift or Nose
2. Flank
3. Opening Clearance Ramp
4. Closing Clearance Ramp
5. Base Circle
6. Exhaust Opening Timing Figure
7. Exhaust Closing Timing Figure
8. Intake Opening Timing Figure
9. Intake Closing Timing Figure
10. Intake to Exhaust Lobe Separation
If anyone sees a mistake or would like another cam added to the list, please PM me the info and I'll get it up ASAP.
Thanks,
Scott