B-series VTEC cam specs
These b-series cams will work in most b-series VTEC heads like the B16A, B17A, and the B18C.
Type: | Intake Lift: | Intake Duration: | Exhaust Lift: | Exhaust Duration: |
---|---|---|---|---|
Crower 63400 | 10.72 mm | 234 @ 1mm | 9.60 mm | 234 @ 1mm |
Crower 63401 | 11.38 mm | 249 @ 1mm | 10.54 mm | 240 @ 1mm |
Crower 63401T | 11.81 mm | 230 @ 1mm | 11.30 mm | 226 @ 1mm |
Crower 63402 | 11.84 mm | 258 @ 1mm | 11.84 mm | 251 @ 1mm |
Crower 63402A | 11.84 mm | 267 @ 1mm | 11.84 mm | 239 @ 1mm |
Crower 63403 | 12.04 mm | 267 @ 1mm | 11.84 mm | 257 @ 1mm |
Crower 63411T | 11.81 mm | 230 @1mm | 11.30 mm | 226 @1mm |
Crower 63412 | 11.83 mm | 248@ 1mm | 11.81 mm | 240@ 1mm |
Crower 63413 | 11.98 mm | 257 @ 1mm | 11.84 mm | 246 @ 1mm |
JDM Civic Type R | 11.5mm | 243 @ 1mm | 10.5 mm | 235 @ 1mm |
JDM Integra Type R | 11.5 mm | 240 @ 1mm | 10.5 mm | 235 @ 1mm |
Jun Type 1 | 10.9 mm | 265.3 @ 1mm | 10.0 mm | 268 @ 1mm |
Jun Type 2 | 12.0 mm | 266.6 @ 1mm | 10.0 mm | 268 @ 1mm |
Jun Type 3 | 12.0 mm | 265.3 @ 1mm | 11.5 mm | 265.3 @ 1mm |
Skunk2 Stage 1 | 11.58 mm | 252 @ 1mm | 10.9 mm | 249 @ 1mm |
Skunk2 Stage 2 | 12.3 mm | 266 @ 1mm | 11.8 mm | 262 @ 1mm |
Skunk2 Stage 3 | 12.8 mm | 273 @ 1mm | 11.5 mm | 273 @ 1mm |
Spoon Sports | 11.53 mm | 256 @ 1mm | 11.13 mm | 245 @ 1mm |
Toda Spec A | 11.6 mm | 250 @ 1mm | 11.2mm | 240 @ 1mm |
Toda Spec B | 12 mm | 255 @ 1mm | 12.5 mm | 255 @ 1mm |
Toda Spec C | 12.5 mm | 255 @ 1mm | 12.5 mm | 255 @ 1mm |
Supporting Mods
Proper valvetrain components like stiffer valve springs and better retainers should be considered required supporting modifications to run most larger cams. Cam gears may be needed as well.
An increase in compression ratio may be required to support the larger/longer cam profile.
A change to the ECU to support increased RPM range may be required for max performance. Be sure to consider the complete build when considering changing your cams.
Additional Reading: B Series Cam Guide
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