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The Tuning School's EFI Tuning Class - Knowledge Is Power

The Tuning School Helps Us Separate Fact From Fiction When It Comes To Proper Tuning Techniques
January, 2010
By Justin Cesler
Photography by Justin Cesler
The Tuning Schools Efi Tuning Class Paper Work
Before you spend another dollar... 
   
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The Tuning Schools Efi Tuning Class Paper Work
Before you spend another dollar adding parts to your car, you should seriously consider taking a class (this class: The Tuning School) on EFI tuning. Sure, using your brain for an entire weekend is not nearly as fun as bolting on a blower or installing a new cat-back.
And, yes, your friends in the parking lot won't notice your new books or technical abilities, but this is much more important than those things. This is about actually understanding what goes on in your computer as you drive down the road. Ever wonder why your big-cammed LS1 stalls when you get to a stoplight, even though your tuner says it's normal? Ever wonder what your car might do with a little more timing or a little less fuel? We did, so we sought out some of the best tuners in the southeast and begged them to let us join in one of their upcoming classes. Little did we know just how much we would learn and how much better off we would be for knowing it.

The Tuning Schools Efi Tuning Class Hp Computer
When we first arrived at The... 
   
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The Tuning Schools Efi Tuning Class Hp Computer
When we first arrived at The Tuning School, we really didn't know what to expect. I immediately booted up my laptop thinking we would delve right into the tuning aspect, which, in retrospect would have been a pretty bad idea. If you attend, you need to bring your own laptop with an updated version of HP Tuners.
The Tuning Schools Efi Tuning Class Instruction Manual
After some brief introductions... 
   
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The Tuning Schools Efi Tuning Class Instruction Manual
After some brief introductions and some morning coffee, The Tuning School crew handed out our course work. This box contained a nice Quick Start Guide, an extremely in-depth tuning book, a MAF and VE guide, and several helpful laminated checklists to use once you get going on the dyno. We were also given a CD to use during the class, which contained screenshots of some datalogs and a couple of tune files for us to use.
The Tuning Schools Efi Tuning Class Class Learning
Since this class was for everyone... 
   
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The Tuning Schools Efi Tuning Class Class Learning
Since this class was for everyone from beginner to advanced students, Larry Neville started out by showing us how an engine works and, more importantly, how this would relate to our tuning. While it may seem simple (suck, squish, bang, blow), it is very important to understand valve events, spark advance, and just how fast everything happens within a cylinder. Building a strong mechanical foundation is key to making smart changes in the computer; so remember to pay attention here.
The Tuning Schools Efi Tuning Class Good Questions
With the firm grasp on the... 
   
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The Tuning Schools Efi Tuning Class Good Questions
With the firm grasp on the mechanics, Scott Seifreit walked the class through the basics of fuel injection, including what sensors are used, how they work, and why a VCM needs them to operate. Knowing what a knock sensor actually is and how it works cannot only help in tuning, but may save some troubleshooting time, which is always a good thing.
The Tuning Schools Efi Tuning Class Computer Assistance
Next, we moved on to learning... 
   
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The Tuning Schools Efi Tuning Class Computer Assistance
Next, we moved on to learning about the importance of datalogging and how to read an HP Tuners' scan file. The Tuning School walked us through using the scanner, setting up a quality configuration file and modifying some scanner parameters. While not as "cool" as the actual tuning portion of HP Tuners, the scanner will turn out to be your best friend, if you know how to interpret the data.
The Tuning Schools Efi Tuning Class Performance Charts
Here you can see some of the... 
   
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The Tuning Schools Efi Tuning Class Performance Charts
Here you can see some of the available Parameter IDs (PID) that HP Tuners can display for a particular vehicle. You have the option to add your own custom PIDs (such as a wideband) using a number of inputs, or modify existing ones to your liking. HP Tuners comes with a couple of stock configuration files, which are a great base to start from.

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