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Unread 12-27-2014, 04:51 PM   #1
Gone Wild
 
Join Date: Oct 2010
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Default Briggs Vanguard EFI project

Yet another hair-brained idea of mine!

After installing the supercharger on my Vanguard, I quickly realized that in order to get any kind of tunability, I would need to have a better fuel management system. So, I am attempting to build an EFI(electronic fuel injection) system for the motor. This will be my 2014/2015 winter project.

There are a few systems available, but they are extremely pricey IMO. That led me to do a little research, actually, a lot of research about DIY EFI systems.
What you are actually paying for, besides the parts, is the software and lookup tables inside the controller. I'm a controls software engineer... I think I can do that myself.

This is the path I decided to take. We'll see what happens.
I will use an Arduino 2560 as the controller. It will have a MAP sensor, an RPM sensor, a TPS, and an AFR input.
All the fuel requirements will be calculated in the Arduino controller, about 1000 times per second, and a PWM signal will drive the injectors(one for each cylinder).
The controller costs about $35, and is open-source, so there is a large community of programmers sharing libraries of functions.
The rest of the parts will probably come from fleabay.

This is the general layout.

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Unread 12-27-2014, 05:30 PM   #2
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Yamaha
 
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Default Re: Briggs Vanguard EFI project

The stuff you come up with amazes me, I cant wait to see this all come together.
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Unread 12-27-2014, 07:09 PM   #3
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Default Re: Briggs Vanguard EFI project

EFI Vanguard! I love it!
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Unread 12-27-2014, 07:17 PM   #4
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Default Re: Briggs Vanguard EFI project

Quote:
Originally Posted by Field6565 View Post
EFI Vanguard! I love it!
They say that "necessity is the mother of invention"!
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Unread 12-27-2014, 07:42 PM   #5
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Default Re: Briggs Vanguard EFI project

If anyone can do it, it would be you.go ahead an put me on the waiting list because I no a bunch of people are going to want it! Good luck an can't wait to see the finished product!
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Unread 12-29-2014, 05:32 PM   #6
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Default Re: Briggs Vanguard EFI project

This should be a fun one to watch!!!

By the way Don, nice new avatar.
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Unread 12-29-2014, 06:50 PM   #7
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Default Re: Briggs Vanguard EFI project

Very simple. So tunable with a laptop? The only other way to do it is to do a mechanical setup like early European cars, but if you know how to do the programs....sweet! How will you deal with elevation changes, just rely on the wideband readings?
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Unread 12-29-2014, 07:05 PM   #8
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Default Re: Briggs Vanguard EFI project

Quote:
Originally Posted by slonomo View Post
How will you deal with elevation changes, just rely on the wideband readings?
You read the MAP sensor before the motor is started. That will give you barometric pressure.
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Unread 12-29-2014, 08:00 PM   #9
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Default Re: Briggs Vanguard EFI project

Sweet! Subscribed and want to see this come together.
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Unread 12-30-2014, 03:28 PM   #10
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Default Re: Briggs Vanguard EFI project

Got my controller board ordered. $15.00. It's an Arduino clone board.



These are the injectors I will use for testing.

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