Tuning Basics Book?
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Cruiser
Joined: Dec 2013
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From: North Carolina
Tuning Basics Book?
I was wondering if any of the wizards in here had a recommendation for a book to read for the basics of EFI tuning. If there's something specific to Twin Cams, so much the better.
Thanks,
Jon
Thanks,
Jon
MODERATOR
Joined: Oct 2007
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From: New England
Just click on the Tuning Guide v134 button to open file.
Ultimate HDF Member
Joined: Jul 2011
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From: New Braunfels, Texas
Even though the tuning is similiar, it's going to be based on which tuner you decide on. There are "sticky's" on this forum that are specific for the most commonly used tuners. There you will find very specific information and those pages also have inputs from some of the best tuners around.
Outstanding HDF Member
Joined: May 2008
Posts: 2,543
Likes: 19
From: Ashland Ohio
There are a few good books. But see how much of this you can digest...
http://www.megamanual.com/begintuning.htm
Here is the deal. In todays auto world, all cars are tuned with a speed density system using a MAF. Mass AirFlow. A MAF actually weighs how much air enters the intake track.
Harley bikes use a speed density system, but does NOT use a MAF. Instead, our system uses a look up table to decide how much air is being used. This table is the VE table. Speed density is called such because it uses a MAP (Manifold Absolute Pressure) sensor to determine the load upon the engine. The higher the MAP the higher the load, the different VE table it looks towards. Three vectors are used here. Throttle position, rpm, and MAP. Autos still use these same three positions, but the VE look up table is a hybrid that uses not only VEs, but actual weight of the incoming air charge.
So, we use Speed density without a MAF. Also good reading would be to get a very basic understanding of older systems. Alpha N is an older tuning system. Alpha N is to two vector system that uses Throttle position and RPM. Alpha N cannot truly tell the actual load being placed upon the engine.
TMax is an Alpha N system, for example.
With the above in mind look for simple How To Tuning Basics books for cars, and remember our bikes are a bit different. Tuning is tuning up to a point, so NO reading, on your part will be wasted. Our bikes also have ION sensing, but save THAT for later. ION sensing is a safety system that folks use to help with timing, but it is NOT the proper tool to use for timing.
http://www.megamanual.com/begintuning.htm
Here is the deal. In todays auto world, all cars are tuned with a speed density system using a MAF. Mass AirFlow. A MAF actually weighs how much air enters the intake track.
Harley bikes use a speed density system, but does NOT use a MAF. Instead, our system uses a look up table to decide how much air is being used. This table is the VE table. Speed density is called such because it uses a MAP (Manifold Absolute Pressure) sensor to determine the load upon the engine. The higher the MAP the higher the load, the different VE table it looks towards. Three vectors are used here. Throttle position, rpm, and MAP. Autos still use these same three positions, but the VE look up table is a hybrid that uses not only VEs, but actual weight of the incoming air charge.
So, we use Speed density without a MAF. Also good reading would be to get a very basic understanding of older systems. Alpha N is an older tuning system. Alpha N is to two vector system that uses Throttle position and RPM. Alpha N cannot truly tell the actual load being placed upon the engine.
TMax is an Alpha N system, for example.
With the above in mind look for simple How To Tuning Basics books for cars, and remember our bikes are a bit different. Tuning is tuning up to a point, so NO reading, on your part will be wasted. Our bikes also have ION sensing, but save THAT for later. ION sensing is a safety system that folks use to help with timing, but it is NOT the proper tool to use for timing.
Last edited by wurk_truk; Jan 26, 2014 at 05:41 PM.
Outstanding HDF Member
Joined: May 2008
Posts: 2,543
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From: Ashland Ohio
I have the name of a good book right on the tip of my tongue... damn alzheimers! 
Here is another decent website to peruse for cars. http://www.enginebasics.com/EFI%20Tuning.html
I am googling around trying to find a book or two I have read in the past, for you. Might not have luck at that today.
Old EFILive discussion on MAF-vs- straight VE tables. http://forum.efilive.com/archive/index.php/t-1773.html
Screw Alzheimers... Here is the book I would suggest you read to gain a start....
Here is another decent website to peruse for cars. http://www.enginebasics.com/EFI%20Tuning.html
I am googling around trying to find a book or two I have read in the past, for you. Might not have luck at that today.
Old EFILive discussion on MAF-vs- straight VE tables. http://forum.efilive.com/archive/index.php/t-1773.html
Screw Alzheimers... Here is the book I would suggest you read to gain a start....
Last edited by wurk_truk; Jan 26, 2014 at 05:52 PM.
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