TegSox
Super Duper Moderator
Aftermarket VTEC camshaft specs
All specs supplied by Team-Integra.net
All of these specs are of the VTEC lobe only.
All duration specs are measured @1mm of lift for purposes of comparison between brands.
USDM GSR (B17a and B18C)
Intake lift 10.6mm, duration 230
Exhaust lift 9.4mm, duration 227
1997-1999 USDM ITR
Intake lift 11.5mm, duration 240
Exhaust lift 10.5mm, duration 235
CTR and 2000-2001 USDM ITR
Intake lift 11.5mm, duration 243
Exhaust lift 10.5mm, duration 235
Buddy Club
Spec 3
Intake lift 11.2mm, duration 250
Exhaust lift 11.5mm, duration 245
Spec 4
Intake lift 12.3mm, duration 269
Exhaust lift 11.8mm, duration 274
Crane
Stage 1
Intake lift 11.6mm, duration 243
Exhaust lift 10.8mm, duration 237
Crower
63402
Intake lift 11.83mm, duration 237
Exhaust lift 11.81mm, duration 228
63403
Intake lift 11.98mm, duration 246
Exhaust lift 11.83mm, duration 238
Jun
Type 1
Intake lift 10.9mm, duration 265
Exhaust lift 10mm, duration 268
Type 2
Intake lift 12mm, duration 267
Exhaust lift 10.9mm, duration 265
Type 3
Intake lift 12mm, duration 265
Exhaust lift 11.5mm, duration 265
Type 4
Intake lift 12.5mm, duration 265
Exhaust lift 12.5mm, duration 265
Piper
BP285
Intake lift 11.6mm, duration 256
Exhaust lift 11.2mm, duration 256
Rocket Motorsports
M22
Intake lift 12.1mm, duration 244
Exhaust lift 12.1mm, duration 244
M23
Intake lift 12.1mm, duration 252
Exhaust lift 12.1mm, duration 252
M24
Intake lift 12.1mm, duration 258
Exhaust lift 12.1mm, duration 258
M24E
Intake lift 12.7mm, duration 263
Exhaust lift 12.7mm, duration 263
M24X
Intake lift 12.7mm, duration 258
Exhaust lift 12.1mm, duration 265
M25
Intake lift 12.1mm, duration 270
Exhaust lift 12.1mm, duration 270
M25E
Intake lift 13.25mm, duration 276
Exhaust lift 13.25mm, duration 276
Skunk2
Stage 1
Intake lift 11.58mm, duration 252
Exhaust lift 10.8mm, duration 249
Stage 2
Intake lift 12.3mm, duration 266
Exhaust lift 11.8mm, duration 262
Stage 3
Intake lift 12.8mm, duration 270
Exhaust lift 11.8mm, duration 279
Pro Series
Stage 1
Intake lift 12.6mm, duration 264
Exhaust lift 11.9mm, duration 264
Stage 2
Intake lift 12.8mm, duration 270
Exhaust lift 12mm, duration 276
Spoon
Intake lift 11.53mm, duration 256
Exhaust lift 11.13mm, duration 245
Toda
Spec A
Intake lift 11.6mm, duration 250
Exhaust lift 11.2mm, duration 240
Spec B
Intake lift 12mm, duration 255
Exhaust lift 12mm, duration 245
Spec C
Intake lift 12.5mm, duration 255
Exhaust lift 12.5mm, duration 255
Increasing duration - Moves peak HP and peak TQ to a higher RPM. The actual value of both also increases.
Increasing lift - Increases HP and TQ, but does not move the point of peak HP and peak TQ up or down the RPM range.
Increasing overlap - Increases peak HP at the sacrifice of low end TQ. (This is where your cam gears come in, adjusting overlap.)
Camshaft terminology
Limit speed - Maximum speed at which a cam can spin.
Major Intensity - How fast the valves are accelerated open.
RPM bounce - The RPM at which the cam and valvespring can no longer control the valve.
All specs supplied by Team-Integra.net
All of these specs are of the VTEC lobe only.
All duration specs are measured @1mm of lift for purposes of comparison between brands.
USDM GSR (B17a and B18C)
Intake lift 10.6mm, duration 230
Exhaust lift 9.4mm, duration 227
1997-1999 USDM ITR
Intake lift 11.5mm, duration 240
Exhaust lift 10.5mm, duration 235
CTR and 2000-2001 USDM ITR
Intake lift 11.5mm, duration 243
Exhaust lift 10.5mm, duration 235
Buddy Club
Spec 3
Intake lift 11.2mm, duration 250
Exhaust lift 11.5mm, duration 245
Spec 4
Intake lift 12.3mm, duration 269
Exhaust lift 11.8mm, duration 274
Crane
Stage 1
Intake lift 11.6mm, duration 243
Exhaust lift 10.8mm, duration 237
Crower
63402
Intake lift 11.83mm, duration 237
Exhaust lift 11.81mm, duration 228
63403
Intake lift 11.98mm, duration 246
Exhaust lift 11.83mm, duration 238
Jun
Type 1
Intake lift 10.9mm, duration 265
Exhaust lift 10mm, duration 268
Type 2
Intake lift 12mm, duration 267
Exhaust lift 10.9mm, duration 265
Type 3
Intake lift 12mm, duration 265
Exhaust lift 11.5mm, duration 265
Type 4
Intake lift 12.5mm, duration 265
Exhaust lift 12.5mm, duration 265
Piper
BP285
Intake lift 11.6mm, duration 256
Exhaust lift 11.2mm, duration 256
Rocket Motorsports
M22
Intake lift 12.1mm, duration 244
Exhaust lift 12.1mm, duration 244
M23
Intake lift 12.1mm, duration 252
Exhaust lift 12.1mm, duration 252
M24
Intake lift 12.1mm, duration 258
Exhaust lift 12.1mm, duration 258
M24E
Intake lift 12.7mm, duration 263
Exhaust lift 12.7mm, duration 263
M24X
Intake lift 12.7mm, duration 258
Exhaust lift 12.1mm, duration 265
M25
Intake lift 12.1mm, duration 270
Exhaust lift 12.1mm, duration 270
M25E
Intake lift 13.25mm, duration 276
Exhaust lift 13.25mm, duration 276
Skunk2
Stage 1
Intake lift 11.58mm, duration 252
Exhaust lift 10.8mm, duration 249
Stage 2
Intake lift 12.3mm, duration 266
Exhaust lift 11.8mm, duration 262
Stage 3
Intake lift 12.8mm, duration 270
Exhaust lift 11.8mm, duration 279
Pro Series
Stage 1
Intake lift 12.6mm, duration 264
Exhaust lift 11.9mm, duration 264
Stage 2
Intake lift 12.8mm, duration 270
Exhaust lift 12mm, duration 276
Spoon
Intake lift 11.53mm, duration 256
Exhaust lift 11.13mm, duration 245
Toda
Spec A
Intake lift 11.6mm, duration 250
Exhaust lift 11.2mm, duration 240
Spec B
Intake lift 12mm, duration 255
Exhaust lift 12mm, duration 245
Spec C
Intake lift 12.5mm, duration 255
Exhaust lift 12.5mm, duration 255
Increasing duration - Moves peak HP and peak TQ to a higher RPM. The actual value of both also increases.
Increasing lift - Increases HP and TQ, but does not move the point of peak HP and peak TQ up or down the RPM range.
Increasing overlap - Increases peak HP at the sacrifice of low end TQ. (This is where your cam gears come in, adjusting overlap.)
Camshaft terminology
Limit speed - Maximum speed at which a cam can spin.
Major Intensity - How fast the valves are accelerated open.
RPM bounce - The RPM at which the cam and valvespring can no longer control the valve.
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