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| techtalk:evo:engmech02 [2025/10/01 06:27] – [Comparing OEM and Andrews Cam Grinds] hippysmack | techtalk:evo:engmech02 [2025/10/01 06:32] (current) – [Comparing OEM and Andrews Cam Grinds] hippysmack | ||
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| All of the old Andrews grinds ... the N2/N4/N6/N8 ... were all designed around the 03 & older heads, which are a totally different animal from the newer heads. If you notice, every one of those grinds is at .500" lift or less> That's because .500" was the maximum safe lift for the hardware that came in the older heads. ((aswracing of the XLFORUM https:// | All of the old Andrews grinds ... the N2/N4/N6/N8 ... were all designed around the 03 & older heads, which are a totally different animal from the newer heads. If you notice, every one of those grinds is at .500" lift or less> That's because .500" was the maximum safe lift for the hardware that came in the older heads. ((aswracing of the XLFORUM https:// | ||
| + | W's actually came out in 1998 on the 1200S models. Then in 2004, all the 1200s got them. Then in 2007, all the 883s got them as well. W cams have a really, really early intake close event. What that does is it builds more cylinder pressure, since more of the compression stroke is used for actual compression. This helps bottom end and mid range a lot. But then at higher rpm's, it chokes the motor. So they' | ||
| These figures are from the Sportster Evolution Cams PDF from Andrews Products. ((Page25 - http:// | These figures are from the Sportster Evolution Cams PDF from Andrews Products. ((Page25 - http:// | ||
