Camshaft for STREET PERFORMANCE (Colombo & Bariani) 12.0mm Lift Mild HP Increase
BEST STREET PERFORMANCE INTAKE CAM
(NEW — No Exchange Necessary)
All of our street/performance cams are daily driver friendly with gentle opening ramps for good idle and transition with no lag or flat spots. Our custom designs have progressively more top end. (82-89 USA SPIDERS WITH BOSCH EFI MUST DO WITHOUT VVT FEATURE.)
This is a great street performance upgrade for all Weber cars. This 12mm CB-12 INTAKE CAM is the tried and true Colombo & Bariani street performance cam with good low end torque, better midrange and a lot more top end than a pair of C/B-11 10.9mm cams. Duration 254 degrees @ .050″ lift. TOTAL DURATION 292. Base circle diameter 1.030,” Standard 1.075.
- Installed as INTAKE CAM CB-12 makes a smooth step up from stock cams, and brings the engine power a pleasant boost by raising the torque curve mostly on the top end.
- Install with a 10.9mm Colombo & Bariani CB-11 as exhaust cam to maintain low end and mid-range performance.
PORTING: Cleaning up the bowls from valve seats to back guides is quite sufficient for street performance cams without enlarging the runners. Full porting is marginally appropriate for street unless you plan to do track days. Enlarging the ports enhances gain from midrange up and pays handsomely above 7000 rpm.
VALVES: Enlarging the window into the chambers with our 1mm oversize valves is equally valuable and lets cams have full effect for both street performance and race.
HEADERS: Cam and porting do make a big difference on their own, but these enhancements will only reach their full potential with our Spruell Motorsport free flow headers.
- The base circle is undercut to 1.025.” (standard is 1.080″) on this high lift 12mm performance cam to eliminate lobe interface with follower bores.
- Bolt-in with no clearance issues with any piston.
- Use our basic VSS12 performance valve springs
We strongly recommend upgrading to VSS12-1 springs for 11.6 and 12mm lift cams.
All new cams should be installed with new followers. We can only guarantee our cams when installed with new set of Spruell Motorsport followers.