Web Cam Type 1 Split Duration Camshaft Grind 218/119, 00-562 is designed for 1/2 1600 Class Cars, and it's specs are .460/.422" Valve Lift with 1.1 Rockers, 280/276 degrees of advertised duration, and 242/240 degrees of duration at .050" checking clearance. This is an absolutely fantastic cam for milder applications when used with dual carbs, expect a 5750 RPM power limit with this camshaft. For example, this is an ACN recommended camshaft for Busses and Type 3s. Run this cam with 8.5 - 8.75:1 compression. When ordering, be sure to get this cam on a 108LC.
This is an ideal cam for an engine with dual 1bbl carbs (ICTs, Kadrons, FRDs), since it is as big as possible without the idle quality going down! 5 degrees more duration (Like an Engle W110) and the idle is poor, but the 218/119 retains a quality idle while still pulling hard!
We recommend HD single springs for 1.1 rockers, and dual springs or beehives for 1.25 rockers. Use a compression ratio of 7.75-8.25:1 in Type 2s and Type 3s, or 8.75-9:1 in Type 1s.
The cam looks like it's aggressive due to the pointy lobe, but it's
actually not. This cam simply doesn't hold the valve open at full lift for
very long, which gives some people the impression that it's
"aggressive". This is a great bus cam for small and medium sized engines
(Mild strokers, aka 74-76mm strokes)!
The Split Duration of this cam was engineered to optimize the power output of Class 1/2 1600 off road racers with RESTRICTOR PLATES. Restrictor plates and/or limited carburation means the engine has a tough time breathing. They never limit the exhaust! By increasing intake's lift/duration and keep the exhaust mild, it extends power while minimizing overlap (losing low end). The intake is what needs help on these engines, not the exhaust, so that's what these cams are designed for!
Lobe Center: The proper term is really "Lobe Separation Angle", but people more recognize "Lobe Center" so that's the term we have used here. Lobe Center is a VERY complex topic, generally speaking a smaller (Narrower) Lobe Center will improve low end power at the expense of top end, and a Wider Lobe Center will do the opposite. Of course, duration does the same (more duration helps top end at the expense of low end), but it's just another way to further refine your power. If you do not know what Lobe Center to choose, the VW Standard is "108 Degrees" and you won't go wrong with that (if you didn't know, we would send you "108 Lobe Center").
We offer a range of Lobe Center options for guys that have researched the topic thoroughly, and want to order a cam with a specialty configuration.
CAM CLEARANCING: Select the Cam Clearancing option for stroker crank on long stroke engines! It's needed on all 82mm or longer strokes, and SOME 78+mm crank/rod combos (VW or Porsche journals). It depends on the size of the big end of the connecting rod, but USUALLY the bigger the rod journal the bigger the big end of the rod. Generally speaking H-beam rods have a smaller "Big End" than I-beam rods do, but the only way to know is to check. If you aren't sure, just pay up for the "Cam Clearancing" option for the most room on your engine build.