Advanced Valvetrain Development (AVD) ft. Billy Godbold – April 19th-21st

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About Course

!!!WARNING!!! This course will change the way you think about camshaft and rocker systems!

This is your chance to peek behind the curtain and unshroud the mystery of camshaft lobe design, selecting event timing, optimizing the system stiffness and translating the camshaft intent to the valve through understanding and manipulating your rocker arm geometry.

We will address issues related to each of these subjects over a 3 day period while we carefully investigate a high-rpm, drag-race competition engine by using data from Combustion Analysis and Dynamic Valve Motion measurement from EFI University’s unique Spintron capabilities.
 While we work our way through the camshaft design process, we will take many opportunities to understand the critical concept that we have a “series of dependent events” conspiring against us and 14484971_10157602758275441_4689657499584865976_nany change we affect in one event can have adverse effects on other events or components.
While examining the camshaft selection process we will explore ways to maximize airflow, increase Volumetric Efficiency and reduce pumping losses starting from the beginning and analyzing each and every critical component in the system.  
We will begin by placing special emphasis on understanding the role of the camshaft as the “Conductor” of the engine’s symphony, and explore the terminology and fundamental design issues when selecting lobe families for a given engine application.
Next, we begin to understand the relationship of the four camshaft “events” relative to what is happening in the four stroke cycle, by comparing graphical data captured in combustion analysis software packages.  By the end of this section, you’ll begin to see why selecting a camshaft based on “Lobe Separation Angle” or “LSA” is really a backwards approach and should never be used a our target, but rather the consequence of the chosen opening an closing points.
Once we understand how to get the camshaft to tell the rest of the engine what it wants, we will begin looking at how the valvetrain can be better prepared to actually carry out those commands and we’ll investigate ways to compare rocker arms, valve springs, pushrods and other system components via graphs developed on our Spintron over years of testing and data collection.
Finally, we’ll spend time exploring valve train geometry, how to measure it, and how to correct problems that crop up while we also discuss methods for setting up and checking the setup of the cylinder heads and valves themselves.
Students will have an opportunity to ask questions directly about projects they are working on and get insightful help from the experts.
This will be an action-packed 3 day crash course and offer a peek inside what the pro’s do to “develop” a competition valve train system.

All of the information covered in this class can be applied to ANY engine you build.

Students will learn:

  • Choosing Lobes versus Selecting a Cam
  • Deciding on Lobe Lift versus Rocker Ratio
  • How to Interpret Combustion Data to help with Cam timing optimization
  • Using Spintron Data for Dynamic Valve Motion behavior and Spring Optimization
  • Camshaft and Rocker geometry to take advantage of really good or really bad stiffness scenarios

Special emphasis will be placed on:

  • Finding and understanding problem areas
  • Understanding the relationships between airflow and valve motion
  • How to test and diagnose camshaft and valvetrain issues

Students will also learn:

  • Engine theory
  • Component Selection
  • Choosing a starting point for a valve spring
  • Deciding how to choose a lobe family
  • Choosing the IVO, IVC, EVO and EVC events for a camshaft

Our Advanced Valvetrain Development class not only dispels some of the magic and mystery of racing engine design, but our results speak for themselves on the track with the customers who WIN with our engines!

This 3-day class is only offered at our state-of-the-art training facility in Lake Havasu, Arizona and is limited to 12 students per class for an excellent student to teacher ratio.

Just consider the peace of mind you can get from your engine projects for less than the cost of a single rebuild.

Don’t build another engine until you attend this course!