B-series VTEC cam specs

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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 6340010.72 mm234 @ 1mm9.60 mm234 @ 1mm
Crower 6340111.38 mm249 @ 1mm10.54 mm240 @ 1mm
Crower 63401T11.81 mm230 @ 1mm11.30 mm226 @ 1mm
Crower 6340211.84 mm258 @ 1mm11.84 mm251 @ 1mm
Crower 63402A11.84 mm267 @ 1mm11.84 mm239 @ 1mm
Crower 6340312.04 mm267 @ 1mm11.84 mm257 @ 1mm
Crower 63411T11.81 mm230 @1mm11.30 mm226 @1mm
Crower 6341211.83 mm248@ 1mm11.81 mm240@ 1mm
Crower 6341311.98 mm257 @ 1mm11.84 mm246 @ 1mm
JDM Civic Type R11.5mm243 @ 1mm10.5 mm235 @ 1mm
JDM Integra Type R11.5 mm240 @ 1mm10.5 mm235 @ 1mm
Jun Type 110.9 mm265.3 @ 1mm10.0 mm268 @ 1mm
Jun Type 212.0 mm266.6 @ 1mm10.0 mm268 @ 1mm
Jun Type 312.0 mm265.3 @ 1mm11.5 mm265.3 @ 1mm
Skunk2 Stage 111.58 mm252 @ 1mm10.9 mm249 @ 1mm
Skunk2 Stage 212.3 mm266 @ 1mm11.8 mm262 @ 1mm
Skunk2 Stage 312.8 mm273 @ 1mm11.5 mm273 @ 1mm
Spoon Sports11.53 mm256 @ 1mm11.13 mm245 @ 1mm
Toda Spec A11.6 mm250 @ 1mm11.2mm240 @ 1mm
Toda Spec B12 mm255 @ 1mm12.5 mm255 @ 1mm
Toda Spec C12.5 mm255 @ 1mm12.5 mm255 @ 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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