[Diy_efi] (no subject)

[Bill Hamilton]

Why couldn't you just use switchable bins with the same ECM.
Just have a little switch to select the type fuel running.
Then you could have the new AFR already set in the bin along with revised 
fuel and timing tables.

Moates used to have a 6 bin switch for GM ECMs

----Original Message Follows----
From: Rick McLeod <dunvegan at sbcglobal.net>
Reply-To: Rick McLeod <dunvegan at sbcglobal.net>, diy_efi at diy-efi.org
To: diy_efi at diy-efi.org
Subject: Re: [Diy_efi] (no subject)
Date: Mon, 5 Jun 2006 06:21:05 -0700 (PDT)

in my understanding, one could use static mapping as long as you know the % 
of alcholhol blend being used. The manufacturer method, though, is to use a 
sensor to measure the % inline to the injectors and dynamically map based on 
measurements, plus a wideband O2 sensor for feedback. This is more complex, 
but not beyond the scope of a DIY'r, just need newer technology controllers 
and sensors to pull it off. Last I herd the Ford and GM systems only added 
less $150 in actual parts (at thier bulk price) to improve to FFV (Ford's 
term for Flexible Fuel Vehicle) E85 capability. So, with some scrounging and 
a little work one should be able to pull off a similar for about the same 
increase. Some of our previous international posters have pioneered this on 
this list, let's see if we can drag a response from one of them, Brazil 
comes to mind.

----- Original Message ----
From: Frederick Trient <gpzmotoman at comcast.net>
To: diy_efi at diy-efi.org
Sent: Sunday, June 4, 2006 10:03:17 PM
Subject: [Diy_efi] (no subject)


Hello out there.
I'm brand new to the list so I hope my questions won't be too basic
for any of you. The rising price of gas has made me think of
improving the mpg for my '65 El Camino. At about 11 mpg with an
Edelbrock 4 barrel carb it's getting pretty expensive to drive.
Another reason for me to consider f.i. is the possibility of E85 gas
becoming available. I'm going on the assumption that fuel injection
is necessary to burn the E85 stuff. Is that correct? If so, it seems
that it would be possible to switch, on the fly, from mapping for
straight unleaded gas to mapping for E85 with a box somewhere on the
dashboard. I'm thinking that it would be necessary to have different
mapping for each type of fuel.
Would appreciate any feedback you guys could give me.
TIA,
Fred
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