BC, otherwise known as Brian Crower, delivered their stage 2 naturally aspirated camshafts, which are known to be an aggressive cam without sacrificing drivability on the streets. Designed using a 304-degree intake and 300-degree duration exhaust specification, the larger-than-factory cam profile requires aftermarket valve springs and retainers.
Installing the new valve springs on the K20 engine can be a complete pain in the ass. Patience and steady hands can take more than a few hours to complete the task. Luckily, we came across Buddy Club's new valve spring removal tool, which enabled us to not only replace the factory valve springs without removing the head but also help to speed up the installation process. Paying close attention to torque specifications and proper installation of the timing chain is crucial in having the engine run without misfiring.
Camshaft, titanium retainers, BC dual valve springs
10-, 12- and 14mm socket, 10- and 12mm open end, ratchet, extension, valve lash tool, valve adjustment tool, white marking paint (for cam gear), shop manual, Hondabond, air compressor (for valve spring removal tool)
180 minutes
Our initial dyno pulls with the newly installed cams looked promising at lower rpm's as the dynamometer recorded a gain of 14hp and 12 lb-ft of torque at 5700 rpm. Things seemed to go downhill from 5800rpm as VTEC kicked in and the K20's horsepower looses steam with a drop in horsepower and torque. At 7400 rpm the power once again picked up over our initial header run with a consistent gain of 3hp and 6 lb-ft of torque until redline. Using the more aggressive BC cam profile with the factory ECU caused erratic horsepower levels. This, once again, backs our theory on how important proper fuel and ignition timing is required to make power.
BC Stage 2 Camshafts/BC Dual Valve
Springs/Titanium Retainers
Peakhp 205.9 / peaktq 143.1
Horsepower Gain
1500 to 3500 HP range: -4 to 2
3500 to 5500 HP range: 6 to 10
5500 to redline HP range: -9 to 8
Torque Gain
1500 to 3500 TQ range: 8 to 2
3500 to 5500 TQ range: 7 to 12
5500 to redline TQ range: 8 to 5