Gets you into trouble on valve-to-piston clearance.
HARLEY EVO CAMSHAFT DEGREE TOOL JIMS PLUS
However, cams with a big overlap window (intake open point plus exhaust close point) also tend to have big TDC lift numbers, and this is what Stroke, thus getting it moving before the piston even starts pulling on it. Overlap can be a wonderful thing in a set of cams, as it effectively connects the exhaust system to the intake tract and gives the exhaust an opportunity to pull on the intake charge at the front of the intake It's exactly as the name implies, how much the valves are open at top deadĬenter (TDC), in this case overlap TDC, not compression TDC (overlap TDC occurs between the exhaust and intake strokes). Not a set of cams is going to get you in trouble on valve-to-piston clearance, TDC lift is the spec you're interested it. TDC Lift: Contrary to popular belief, maximum lift has no bearing on valve-to-piston clearance, because max lift occurs with the piston well down the bore. Here's what to look for on the spec sheet: The complexity level is directly related to the cams you're trying to install, and for that information, Swapping your cams can be very simple or very complex or anywhere in between.
You have any questions, don't hesitate to contact us, we're happy to help. We want your project to be a success, so this article is provided to show all the ins and outs of swapping cams on an XL motor. When you start leaving power on the table by virtue of your stock cams, it's time to change them. Cylinder fill is the name of the game, and cams play a huge role in that, by both the timing of when they open and close Cam Specs and How They Affect InstallationĬhanging cams is part of almost every high performance project, simply because the factory cams generally start limiting you before you make it very far down the path of modifying your motor.
0 kommentar(er)
