Web Cam Type 1 Camshaft, Grind 109, 1.1 or 1.25 Rockers, 00-072 is designed for 1.1 and 1.25 rockers, and it's specs are .465" Valve Lift with 1.1 Rockers, 287 degrees of advertised duration, and 260 degrees of duration at .050" checking clearance.This cam is similar to the Engle 125. A little bigger than the Engle or Web 110, but with more valve lift. Harder on the Valve Train than the 110, with extended mid and top RPM Power. You MUST have a decent amount of headwork AND Dual 2bbls of carburetion or your engine is not going to work well.
Expect a powerband from 2000 to 6000 RPMs, the more headwork and carburetion the better the top end will be.
Due to this cam's fast ramps, it requires Dual Valve springs and Bolt On Rocker Shafts. Use a compression ratio of 8.75-9.5:1
If you choose to use this cam with 1.25 rockers, you will extend the top end to 6200, and you will have to be VERY careful with coil bind and lifter/case clearance.
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 do offer other Lobe Centers for guys that have researched the topic enough, and make these options available to those that want them.
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.