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Original Message
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| "B" cams and info... |
| By kevin - 04/08/2002 11:13:02 AM; IP 209.240.222.130 |
| OK, the B cam was Ford's grind that they ran at LeMans and later sold over the counter in the Muscle Parts catalogue. It is a variation of the original 427-425 (2-4V) horse Low-Riser cam. It was ground on 106 lobe centers as opposed to 114 for the street cam. Both have .500 lift and 324 duration. The B cam was developed to compensate for the lower octane fuel required in FIA competition that oversaw the international racing rules. Ford had to lower the compression to 10-1 for the 100 octane fuel. To keep the combo working, they changed the opening and closing points of the valves. The Melling # RBL 13 YC (I think) and TRW # TP 143 were ground on the 114 centerlines like the stock factory passenger car cams were. There are other company's that repackage this cam too, as its the standard in the industry. The standard cam (114, 3,000-6,500) idles well for its size. The "B", 3,500-7,000 does not. The ramps are gentle on valve train and valve & seat interface. You can achieve 500 horse with the B cam in a well set up FE. The Medium Riser used the 306 cam by the way, (original 427-4V grind). |
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